Poj 3057 未AC http://poj.org/showsource?solution_id=15175171
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<span style="font-size:18px;">#include <iostream>#include <cstdio>#include <cstring>#include <cstdlib>#include <cmath>#include <vector>#include <queue>#include <map>#include <algorithm>#include <set>using namespace std;#define MM(a) memset(a,0,sizeof(a))typedef long long ll;typedef unsigned long long ULL;const int mod = 1000000007;const double eps = 1e-10;const int inf = 0x3f3f3f3f;const int big=50000;int max(int a,int b) {return a>b?a:b;};int min(int a,int b) {return a<b?a:b;};int n,m,x,y;vector<int> G[1005];vector<int> dx,dy,px,py;char field[15][15];int xx[4]={-1,1,0,0},yy[4]={0,0,1,-1};int sroad[15][15][15][15],dist[15][15];int used[150],match[150];void add_edge(int u,int v){ G[u].push_back(v); G[v].push_back(u); //printf("%d %d//////\n",u,G[u][G[u].size()-1]);}void bfs(int x,int y){ memset(dist,-1,sizeof(dist)); dist[x][y]=0; queue<int> qx,qy; qx.push(x); qy.push(y); while(!qx.empty()) { for(int i=0;i<=3;i++) { int tx=qx.front()+xx[i],ty=qy.front()+yy[i]; if(tx>=1&&tx<=n&&ty>=1&&ty<=m) { if(field[tx][ty]=='.'&&dist[tx][ty]<0) { dist[tx][ty]=dist[x][y]+1; sroad[x][y][tx][ty]=dist[tx][ty]; qx.push(tx); qy.push(ty); } } } qx.pop(); qy.pop(); }}int dfs(int u){ used[u]=1; for(int i=0;i<G[u].size();i++) { int v=G[u][i],w=match[v]; //printf("%d %d %d %d//////\n",u,match[u],v,match[v]); if(w<0||!used[w]&&dfs(w)) { match[u]=v; match[v]=u; return 1; } } return 0;}int pipei(int t){ int res=0; for(int i=0;i<dx.size();i++) { int u=i+t*dx.size(); //cout<<u<<" /////// "<<match[u]<<endl; if(match[u]<0) { memset(used,0,sizeof(used)); if(dfs(u)) res++; } } return res;}int num(int t){ for(int i=0;i<px.size();i++) for(int j=0;j<dx.size();j++) { int renx=px[i],reny=py[i]; int menx=dx[j],meny=dy[j]; if(sroad[menx][meny][renx][reny]<=t) add_edge(t*dx.size()+j,1000*dx.size()+i); } return pipei(t);}void solve(){ memset(match,-1,sizeof(match)); memset(sroad,inf,sizeof(sroad)); int ans=0; for(int t=0;t<=n*m+3;t++) { ans+=num(t); if(ans>=px.size()) { cout<<t<<endl; return; } } cout<<"impossible"<<endl;}int main(){ int cas; cin>>cas; while(cas--) { scanf("%d %d",&n,&m); dx.clear();dy.clear(); px.clear();py.clear(); for(int i=0;i<=500;i++) G[i].clear(); for(int i=1;i<=n;i++) scanf("%s",field[i]); for(int i=1;i<=n;i++) { for(int j=0;j<m;j++) if(field[i][j]=='D') { dx.push_back(i); dy.push_back(j+1); bfs(i,j+1); } else if(field[i][j]=='.') { px.push_back(i); py.push_back(j+1); } } solve(); } return 0;}</span></pre><ul style="font-family: Simsun;font-size:14px;"><pre class="sh_cpp sh_sourceCode" style="font-family: 'Courier New', Courier, monospace; background-color: white;"><span class="sh_preproc" style="color: rgb(0, 0, 139); font-weight: bold;">#include</span> <span class="sh_string" style="color: red; font-family: monospace;"><iostream></span><span class="sh_preproc" style="color: rgb(0, 0, 139); font-weight: bold;">#include</span> <span class="sh_string" style="color: red; font-family: monospace;"><cstdio></span><span class="sh_preproc" style="color: rgb(0, 0, 139); font-weight: bold;">#include</span> <span class="sh_string" style="color: red; font-family: monospace;"><cstring></span><span class="sh_preproc" style="color: rgb(0, 0, 139); font-weight: bold;">#include</span> <span class="sh_string" style="color: red; font-family: monospace;"><cstdlib></span><span class="sh_preproc" style="color: rgb(0, 0, 139); font-weight: bold;">#include</span> <span class="sh_string" style="color: red; font-family: monospace;"><cmath></span><span class="sh_preproc" style="color: rgb(0, 0, 139); font-weight: bold;">#include</span> <span class="sh_string" style="color: red; font-family: monospace;"><vector></span><span class="sh_preproc" style="color: rgb(0, 0, 139); font-weight: bold;">#include</span> <span class="sh_string" style="color: red; font-family: monospace;"><queue></span><span class="sh_preproc" style="color: rgb(0, 0, 139); font-weight: bold;">#include</span> <span class="sh_string" style="color: red; font-family: monospace;"><map></span><span class="sh_preproc" style="color: rgb(0, 0, 139); font-weight: bold;">#include</span> <span class="sh_string" style="color: red; font-family: monospace;"><algorithm></span><span class="sh_preproc" style="color: rgb(0, 0, 139); font-weight: bold;">#include</span> <span class="sh_string" style="color: red; font-family: monospace;"><set></span><span class="sh_keyword" style="color: blue; font-weight: bold;">using</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">namespace</span> std<span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span><span class="sh_preproc" style="color: rgb(0, 0, 139); font-weight: bold;">#define</span> <span class="sh_function" style="font-weight: bold;">MM</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>a<span class="sh_symbol" style="color: rgb(139, 0, 0);">)</span> <span class="sh_function" style="font-weight: bold;">memset</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>a<span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span><span class="sh_keyword" style="color: blue; font-weight: bold;">sizeof</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>a<span class="sh_symbol" style="color: rgb(139, 0, 0);">))</span><span class="sh_keyword" style="color: blue; font-weight: bold;">typedef</span> <span class="sh_type" style="color: rgb(0, 100, 0);">long</span> <span class="sh_type" style="color: rgb(0, 100, 0);">long</span> ll<span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span><span class="sh_keyword" style="color: blue; font-weight: bold;">typedef</span> <span class="sh_type" style="color: rgb(0, 100, 0);">unsigned</span> <span class="sh_type" style="color: rgb(0, 100, 0);">long</span> <span class="sh_type" style="color: rgb(0, 100, 0);">long</span> ULL<span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span><span class="sh_keyword" style="color: blue; font-weight: bold;">const</span> <span class="sh_type" style="color: rgb(0, 100, 0);">int</span> mod <span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span> <span class="sh_number" style="color: purple;">1000000007</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span><span class="sh_keyword" style="color: blue; font-weight: bold;">const</span> <span class="sh_type" style="color: rgb(0, 100, 0);">double</span> eps <span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span> <span class="sh_number" style="color: purple;">1e-10</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span><span class="sh_keyword" style="color: blue; font-weight: bold;">const</span> <span class="sh_type" style="color: rgb(0, 100, 0);">int</span> inf <span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span> <span class="sh_number" style="color: purple;">0x3f3f3f3f</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span><span class="sh_keyword" style="color: blue; font-weight: bold;">const</span> <span class="sh_type" style="color: rgb(0, 100, 0);">int</span> big<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span><span class="sh_number" style="color: purple;">50000</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> <span class="sh_function" style="font-weight: bold;">max</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> a<span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> b<span class="sh_symbol" style="color: rgb(139, 0, 0);">)</span> <span class="sh_cbracket" style="color: red;">{</span><span class="sh_keyword" style="color: blue; font-weight: bold;">return</span> a<span class="sh_symbol" style="color: rgb(139, 0, 0);">></span>b<span class="sh_symbol" style="color: rgb(139, 0, 0);">?</span>a<span class="sh_symbol" style="color: rgb(139, 0, 0);">:</span>b<span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span><span class="sh_cbracket" style="color: red;">}</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> <span class="sh_function" style="font-weight: bold;">min</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> a<span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> b<span class="sh_symbol" style="color: rgb(139, 0, 0);">)</span> <span class="sh_cbracket" style="color: red;">{</span><span class="sh_keyword" style="color: blue; font-weight: bold;">return</span> a<span class="sh_symbol" style="color: rgb(139, 0, 0);"><</span>b<span class="sh_symbol" style="color: rgb(139, 0, 0);">?</span>a<span class="sh_symbol" style="color: rgb(139, 0, 0);">:</span>b<span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span><span class="sh_cbracket" style="color: red;">}</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> n<span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span>m<span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span>x<span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span>y<span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span>vector<span class="sh_symbol" style="color: rgb(139, 0, 0);"><</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">></span> G<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span><span class="sh_number" style="color: purple;">100005</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">];</span>vector<span class="sh_symbol" style="color: rgb(139, 0, 0);"><</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">></span> dx<span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span>dy<span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span>px<span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span>py<span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span><span class="sh_type" style="color: rgb(0, 100, 0);">char</span> field<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span><span class="sh_number" style="color: purple;">15</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">][</span><span class="sh_number" style="color: purple;">15</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">];</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> xx<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span><span class="sh_number" style="color: purple;">4</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">]=</span><span class="sh_cbracket" style="color: red;">{</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">-</span><span class="sh_number" style="color: purple;">1</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span><span class="sh_number" style="color: purple;">1</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span><span class="sh_number" style="color: purple;">0</span><span class="sh_cbracket" style="color: red;">}</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span>yy<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span><span class="sh_number" style="color: purple;">4</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">]=</span><span class="sh_cbracket" style="color: red;">{</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span><span class="sh_number" style="color: purple;">1</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">,-</span><span class="sh_number" style="color: purple;">1</span><span class="sh_cbracket" style="color: red;">}</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> sroad<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span><span class="sh_number" style="color: purple;">15</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">][</span><span class="sh_number" style="color: purple;">15</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">][</span><span class="sh_number" style="color: purple;">15</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">][</span><span class="sh_number" style="color: purple;">15</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">],</span>dist<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span><span class="sh_number" style="color: purple;">15</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">][</span><span class="sh_number" style="color: purple;">15</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">];</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> used<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span><span class="sh_number" style="color: purple;">30000</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">],</span>match<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span><span class="sh_number" style="color: purple;">1000000</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">];</span><span class="sh_type" style="color: rgb(0, 100, 0);">void</span> <span class="sh_function" style="font-weight: bold;">add_edge</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> u<span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> v<span class="sh_symbol" style="color: rgb(139, 0, 0);">)</span><span class="sh_cbracket" style="color: red;">{</span> G<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>u<span class="sh_symbol" style="color: rgb(139, 0, 0);">].</span><span class="sh_function" style="font-weight: bold;">push_back</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>v<span class="sh_symbol" style="color: rgb(139, 0, 0);">);</span> G<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>v<span class="sh_symbol" style="color: rgb(139, 0, 0);">].</span><span class="sh_function" style="font-weight: bold;">push_back</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>u<span class="sh_symbol" style="color: rgb(139, 0, 0);">);</span><span class="sh_cbracket" style="color: red;">}</span><span class="sh_type" style="color: rgb(0, 100, 0);">void</span> <span class="sh_function" style="font-weight: bold;">bfs</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> x<span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> y<span class="sh_symbol" style="color: rgb(139, 0, 0);">)</span><span class="sh_cbracket" style="color: red;">{</span> <span class="sh_function" style="font-weight: bold;">memset</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>dist<span class="sh_symbol" style="color: rgb(139, 0, 0);">,-</span><span class="sh_number" style="color: purple;">1</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span><span class="sh_keyword" style="color: blue; font-weight: bold;">sizeof</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>dist<span class="sh_symbol" style="color: rgb(139, 0, 0);">));</span> dist<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>x<span class="sh_symbol" style="color: rgb(139, 0, 0);">][</span>y<span class="sh_symbol" style="color: rgb(139, 0, 0);">]=</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span> queue<span class="sh_symbol" style="color: rgb(139, 0, 0);"><</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">></span> qx<span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span>qy<span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span> qx<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">push</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>x<span class="sh_symbol" style="color: rgb(139, 0, 0);">);</span> qy<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">push</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>y<span class="sh_symbol" style="color: rgb(139, 0, 0);">);</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">while</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(!</span>qx<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">empty</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">())</span> <span class="sh_cbracket" style="color: red;">{</span> <span class="sh_type" style="color: rgb(0, 100, 0);">int</span> sx<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span>qx<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">front</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">();</span> <span class="sh_type" style="color: rgb(0, 100, 0);">int</span> sy<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span>qy<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">front</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">();</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">for</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> i<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);"><=</span><span class="sh_number" style="color: purple;">3</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">++)</span> <span class="sh_cbracket" style="color: red;">{</span> <span class="sh_type" style="color: rgb(0, 100, 0);">int</span> tx<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span>sx<span class="sh_symbol" style="color: rgb(139, 0, 0);">+</span>xx<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">],</span>ty<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span>sy<span class="sh_symbol" style="color: rgb(139, 0, 0);">+</span>yy<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">];</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">if</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>tx<span class="sh_symbol" style="color: rgb(139, 0, 0);">>=</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">&&</span>tx<span class="sh_symbol" style="color: rgb(139, 0, 0);"><</span>n<span class="sh_symbol" style="color: rgb(139, 0, 0);">&&</span>ty<span class="sh_symbol" style="color: rgb(139, 0, 0);">>=</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">&&</span>ty<span class="sh_symbol" style="color: rgb(139, 0, 0);"><</span>m<span class="sh_symbol" style="color: rgb(139, 0, 0);">)</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">if</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>field<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>tx<span class="sh_symbol" style="color: rgb(139, 0, 0);">][</span>ty<span class="sh_symbol" style="color: rgb(139, 0, 0);">]==</span><span class="sh_string" style="color: red; font-family: monospace;">'.'</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">&&</span>dist<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>tx<span class="sh_symbol" style="color: rgb(139, 0, 0);">][</span>ty<span class="sh_symbol" style="color: rgb(139, 0, 0);">]<</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">)</span> <span class="sh_cbracket" style="color: red;">{</span> dist<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>tx<span class="sh_symbol" style="color: rgb(139, 0, 0);">][</span>ty<span class="sh_symbol" style="color: rgb(139, 0, 0);">]=</span>dist<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>sx<span class="sh_symbol" style="color: rgb(139, 0, 0);">][</span>sy<span class="sh_symbol" style="color: rgb(139, 0, 0);">]+</span><span class="sh_number" style="color: purple;">1</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span> sroad<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>x<span class="sh_symbol" style="color: rgb(139, 0, 0);">][</span>y<span class="sh_symbol" style="color: rgb(139, 0, 0);">][</span>tx<span class="sh_symbol" style="color: rgb(139, 0, 0);">][</span>ty<span class="sh_symbol" style="color: rgb(139, 0, 0);">]=</span>dist<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>tx<span class="sh_symbol" style="color: rgb(139, 0, 0);">][</span>ty<span class="sh_symbol" style="color: rgb(139, 0, 0);">];</span> qx<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">push</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>tx<span class="sh_symbol" style="color: rgb(139, 0, 0);">);</span> qy<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">push</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>ty<span class="sh_symbol" style="color: rgb(139, 0, 0);">);</span> <span class="sh_cbracket" style="color: red;">}</span> <span class="sh_cbracket" style="color: red;">}</span> qx<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">pop</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">();</span> qy<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">pop</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">();</span> <span class="sh_cbracket" style="color: red;">}</span><span class="sh_cbracket" style="color: red;">}</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> <span class="sh_function" style="font-weight: bold;">dfs</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> u<span class="sh_symbol" style="color: rgb(139, 0, 0);">)</span><span class="sh_cbracket" style="color: red;">{</span> used<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>u<span class="sh_symbol" style="color: rgb(139, 0, 0);">]=</span><span class="sh_number" style="color: purple;">1</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">for</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> i<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);"><</span>G<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>u<span class="sh_symbol" style="color: rgb(139, 0, 0);">].</span><span class="sh_function" style="font-weight: bold;">size</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">();</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">++)</span> <span class="sh_cbracket" style="color: red;">{</span> <span class="sh_type" style="color: rgb(0, 100, 0);">int</span> v<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span>G<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>u<span class="sh_symbol" style="color: rgb(139, 0, 0);">][</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">],</span>w<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span>match<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>v<span class="sh_symbol" style="color: rgb(139, 0, 0);">];</span> <span class="sh_comment" style="color: rgb(165, 42, 42); font-style: italic;">//printf("%d %d\n",v,match[v]);</span> <span class="sh_comment" style="color: rgb(165, 42, 42); font-style: italic;">// printf("match: %d w:%d\n",match[v],w);</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">if</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>w<span class="sh_symbol" style="color: rgb(139, 0, 0);"><</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">||!</span>used<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>w<span class="sh_symbol" style="color: rgb(139, 0, 0);">]&&</span><span class="sh_function" style="font-weight: bold;">dfs</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>w<span class="sh_symbol" style="color: rgb(139, 0, 0);">))</span> <span class="sh_cbracket" style="color: red;">{</span> match<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>u<span class="sh_symbol" style="color: rgb(139, 0, 0);">]=</span>v<span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span> match<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>v<span class="sh_symbol" style="color: rgb(139, 0, 0);">]=</span>u<span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span> <span class="sh_comment" style="color: rgb(165, 42, 42); font-style: italic;">//printf("wwwww\n");</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">return</span> <span class="sh_number" style="color: purple;">1</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span> <span class="sh_cbracket" style="color: red;">}</span> <span class="sh_cbracket" style="color: red;">}</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">return</span> <span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span><span class="sh_cbracket" style="color: red;">}</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> <span class="sh_function" style="font-weight: bold;">pipei</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> t<span class="sh_symbol" style="color: rgb(139, 0, 0);">)</span><span class="sh_cbracket" style="color: red;">{</span> <span class="sh_type" style="color: rgb(0, 100, 0);">int</span> res<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">for</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> i<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);"><</span>dx<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">size</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">();</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">++)</span> <span class="sh_cbracket" style="color: red;">{</span> <span class="sh_type" style="color: rgb(0, 100, 0);">int</span> u<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">+</span>t<span class="sh_symbol" style="color: rgb(139, 0, 0);">*</span>dx<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">size</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">();</span> <span class="sh_comment" style="color: rgb(165, 42, 42); font-style: italic;">//printf("4 match:%d\n",match[0]);</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">if</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>match<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>u<span class="sh_symbol" style="color: rgb(139, 0, 0);">]<</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">)</span> <span class="sh_cbracket" style="color: red;">{</span> <span class="sh_function" style="font-weight: bold;">memset</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>used<span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span><span class="sh_keyword" style="color: blue; font-weight: bold;">sizeof</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>used<span class="sh_symbol" style="color: rgb(139, 0, 0);">));</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">if</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span><span class="sh_function" style="font-weight: bold;">dfs</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>u<span class="sh_symbol" style="color: rgb(139, 0, 0);">))</span> res<span class="sh_symbol" style="color: rgb(139, 0, 0);">++;</span> <span class="sh_cbracket" style="color: red;">}</span> <span class="sh_cbracket" style="color: red;">}</span> <span class="sh_comment" style="color: rgb(165, 42, 42); font-style: italic;">// printf("res:%d\n",res);</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">return</span> res<span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span><span class="sh_cbracket" style="color: red;">}</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> <span class="sh_function" style="font-weight: bold;">num</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> t<span class="sh_symbol" style="color: rgb(139, 0, 0);">)</span><span class="sh_cbracket" style="color: red;">{</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">for</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> i<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);"><</span>px<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">size</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">();</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">++)</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">for</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> j<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span>j<span class="sh_symbol" style="color: rgb(139, 0, 0);"><</span>dx<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">size</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">();</span>j<span class="sh_symbol" style="color: rgb(139, 0, 0);">++)</span> <span class="sh_cbracket" style="color: red;">{</span> <span class="sh_type" style="color: rgb(0, 100, 0);">int</span> renx<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span>px<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">],</span>reny<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span>py<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">];</span> <span class="sh_type" style="color: rgb(0, 100, 0);">int</span> menx<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span>dx<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>j<span class="sh_symbol" style="color: rgb(139, 0, 0);">],</span>meny<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span>dy<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>j<span class="sh_symbol" style="color: rgb(139, 0, 0);">];</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">if</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>sroad<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>menx<span class="sh_symbol" style="color: rgb(139, 0, 0);">][</span>meny<span class="sh_symbol" style="color: rgb(139, 0, 0);">][</span>renx<span class="sh_symbol" style="color: rgb(139, 0, 0);">][</span>reny<span class="sh_symbol" style="color: rgb(139, 0, 0);">]<=</span>t<span class="sh_symbol" style="color: rgb(139, 0, 0);">)</span> <span class="sh_function" style="font-weight: bold;">add_edge</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>t<span class="sh_symbol" style="color: rgb(139, 0, 0);">*</span>dx<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">size</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">()+</span>j<span class="sh_symbol" style="color: rgb(139, 0, 0);">,(</span>n<span class="sh_symbol" style="color: rgb(139, 0, 0);">*</span>m<span class="sh_number" style="color: purple;">+10</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">)*</span>dx<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">size</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">()+</span><span class="sh_number" style="color: purple;">10</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">+</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">);</span> <span class="sh_cbracket" style="color: red;">}</span> <span class="sh_comment" style="color: rgb(165, 42, 42); font-style: italic;">//printf("3 match:%d\n",match[0]);</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">return</span> <span class="sh_function" style="font-weight: bold;">pipei</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>t<span class="sh_symbol" style="color: rgb(139, 0, 0);">);</span><span class="sh_cbracket" style="color: red;">}</span><span class="sh_type" style="color: rgb(0, 100, 0);">void</span> <span class="sh_function" style="font-weight: bold;">solve</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">()</span><span class="sh_cbracket" style="color: red;">{</span> <span class="sh_function" style="font-weight: bold;">memset</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>match<span class="sh_symbol" style="color: rgb(139, 0, 0);">,-</span><span class="sh_number" style="color: purple;">1</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span><span class="sh_keyword" style="color: blue; font-weight: bold;">sizeof</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>match<span class="sh_symbol" style="color: rgb(139, 0, 0);">));</span> <span class="sh_comment" style="color: rgb(165, 42, 42); font-style: italic;">//printf("1 match:%d\n",match[0]);</span> <span class="sh_type" style="color: rgb(0, 100, 0);">int</span> ans<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">for</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> t<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span>t<span class="sh_symbol" style="color: rgb(139, 0, 0);"><=</span>n<span class="sh_symbol" style="color: rgb(139, 0, 0);">*</span>m<span class="sh_number" style="color: purple;">+3</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span>t<span class="sh_symbol" style="color: rgb(139, 0, 0);">++)</span> <span class="sh_cbracket" style="color: red;">{</span> ans<span class="sh_symbol" style="color: rgb(139, 0, 0);">+=</span><span class="sh_function" style="font-weight: bold;">num</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>t<span class="sh_symbol" style="color: rgb(139, 0, 0);">);</span> <span class="sh_comment" style="color: rgb(165, 42, 42); font-style: italic;">//cout<<t<<" "<<num(t)<<endl;</span> <span class="sh_comment" style="color: rgb(165, 42, 42); font-style: italic;">//printf("2 match:%d\n",match[0]);</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">if</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>ans<span class="sh_symbol" style="color: rgb(139, 0, 0);">>=</span>px<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">size</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">())</span> <span class="sh_cbracket" style="color: red;">{</span> cout<span class="sh_symbol" style="color: rgb(139, 0, 0);"><<</span>t<span class="sh_symbol" style="color: rgb(139, 0, 0);"><<</span>endl<span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">return</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span> <span class="sh_cbracket" style="color: red;">}</span> <span class="sh_cbracket" style="color: red;">}</span> cout<span class="sh_symbol" style="color: rgb(139, 0, 0);"><<</span><span class="sh_string" style="color: red; font-family: monospace;">"impossible"</span><span class="sh_symbol" style="color: rgb(139, 0, 0);"><<</span>endl<span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span><span class="sh_cbracket" style="color: red;">}</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> <span class="sh_function" style="font-weight: bold;">main</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">()</span><span class="sh_cbracket" style="color: red;">{</span> <span class="sh_type" style="color: rgb(0, 100, 0);">int</span> cas<span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span> cin<span class="sh_symbol" style="color: rgb(139, 0, 0);">>></span>cas<span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">while</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>cas<span class="sh_symbol" style="color: rgb(139, 0, 0);">--)</span> <span class="sh_cbracket" style="color: red;">{</span> <span class="sh_function" style="font-weight: bold;">scanf</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span><span class="sh_string" style="color: red; font-family: monospace;">"%d %d"</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">,&</span>n<span class="sh_symbol" style="color: rgb(139, 0, 0);">,&</span>m<span class="sh_symbol" style="color: rgb(139, 0, 0);">);</span> dx<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">clear</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">();</span>dy<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">clear</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">();</span> px<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">clear</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">();</span>py<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">clear</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">();</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">for</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> i<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);"><=</span><span class="sh_number" style="color: purple;">500</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">++)</span> G<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">].</span><span class="sh_function" style="font-weight: bold;">clear</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">();</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">for</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> i<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);"><</span>n<span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">++)</span> <span class="sh_function" style="font-weight: bold;">scanf</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span><span class="sh_string" style="color: red; font-family: monospace;">"%s"</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span>field<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">]);</span> <span class="sh_function" style="font-weight: bold;">memset</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>sroad<span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span>inf<span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span><span class="sh_keyword" style="color: blue; font-weight: bold;">sizeof</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>sroad<span class="sh_symbol" style="color: rgb(139, 0, 0);">));</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">for</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> i<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);"><</span>n<span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">++)</span> <span class="sh_cbracket" style="color: red;">{</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">for</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span><span class="sh_type" style="color: rgb(0, 100, 0);">int</span> j<span class="sh_symbol" style="color: rgb(139, 0, 0);">=</span><span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span>j<span class="sh_symbol" style="color: rgb(139, 0, 0);"><</span>m<span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span>j<span class="sh_symbol" style="color: rgb(139, 0, 0);">++)</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">if</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>field<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">][</span>j<span class="sh_symbol" style="color: rgb(139, 0, 0);">]==</span><span class="sh_string" style="color: red; font-family: monospace;">'D'</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">)</span> <span class="sh_cbracket" style="color: red;">{</span> dx<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">push_back</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">);</span> dy<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">push_back</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>j<span class="sh_symbol" style="color: rgb(139, 0, 0);">);</span> <span class="sh_function" style="font-weight: bold;">bfs</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">,</span>j<span class="sh_symbol" style="color: rgb(139, 0, 0);">);</span> <span class="sh_cbracket" style="color: red;">}</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">else</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">if</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>field<span class="sh_symbol" style="color: rgb(139, 0, 0);">[</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">][</span>j<span class="sh_symbol" style="color: rgb(139, 0, 0);">]==</span><span class="sh_string" style="color: red; font-family: monospace;">'.'</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">)</span> <span class="sh_cbracket" style="color: red;">{</span> px<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">push_back</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>i<span class="sh_symbol" style="color: rgb(139, 0, 0);">);</span> py<span class="sh_symbol" style="color: rgb(139, 0, 0);">.</span><span class="sh_function" style="font-weight: bold;">push_back</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">(</span>j<span class="sh_symbol" style="color: rgb(139, 0, 0);">);</span> <span class="sh_cbracket" style="color: red;">}</span> <span class="sh_cbracket" style="color: red;">}</span> <span class="sh_function" style="font-weight: bold;">solve</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">();</span> <span class="sh_cbracket" style="color: red;">}</span> <span class="sh_keyword" style="color: blue; font-weight: bold;">return</span> <span class="sh_number" style="color: purple;">0</span><span class="sh_symbol" style="color: rgb(139, 0, 0);">;</span><span class="sh_cbracket" style="color: red;">}</span> 1 0
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