UVa 1599 Ideal Path[待AC]

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dix[]保存到终点的最短权值，d[]保存到终点的最短边长

结构体保存边和权值，二维数组太大用不了;

一直Runtime Error.....

#include<iostream>#include<cstring>#include<set>#include<vector>#include<cstdio>#include<queue>#include<cctype>using namespace std;const int INF=(1<<30);const int maxn=100005;int d[maxn],n,dix[maxn],ans[maxn],k;struct Line{int u,v,weight;Line(int u=0,int v=0,int weight=0) :u(u),v(v),weight(weight) {}}G[maxn*2];void print(int* A,int n){for(int i=0;i<n;i++){if(i) putchar(' ');printf("%d",A[i]);}printf("\n");}void bfs(){queue<int> q;q.push(n);d[n]=0;for(int i=1;i<n;i++)d[i]=INF;dix[n]=0;for(int i=1;i<n;i++)dix[i]=INF;int vis[maxn]={0};vis[n]=1;while(!q.empty()){int u=q.front();q.pop();for(int i=0;i<k;i++){int v=G[i].u,nu=G[i].v;if(nu==u&&!vis[v]){if(d[v]>1+d[u])d[v]=d[u]+1;if(dix[v]>dix[u]+G[i].weight)dix[v]=dix[u]+G[i].weight;vis[v]=1;q.push(v);}}}}int ans_bfs(){int u=1;int p=0;ans[p++]=1;while(u!=n){int mv=INF,mw=INF;for(int v=1;v<=n;v++){if(d[u]-d[v]==1&&mw>dix[v]){mv=v;mw=dix[v];}}u=mv;ans[p++]=mv;}return p-1;}int main(){while(scanf("%d%d",&n,&k)!=EOF){memset(G,0,sizeof(G));for(int i=0;i<k;i++){int x,y,m;scanf("%d%d%d",&x,&y,&m);G[i].u=x;G[i].v=y;G[i].weight=m;}bfs();k=ans_bfs();printf("%d\n",k);print(ans,k);}return 0;}

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