[贪心 构造] SRM 717 div1 ScoresSequence

首先他保证图唯一确定，那么可以把图给构出来
类似这个题，按照出度从大到小排序，出度最大那个点怎么分配，类似无向图可图判定，应该是向出度小的点连，使得出度大的向他连，让出度大的出度减小

// BEGIN CUT HERE  #include<conio.h>#include<sstream>// END CUT HERE  #include<cstdio>#include<cstdlib>#include<cstring>#include<cmath>#include<iostream>#include<algorithm>#include<vector>#include<map>#include<string>#include<set>#define cl(x) memset(x,0,sizeof(x))using namespace std;typedef long long ll;typedef pair<int,int> abcd;const int N=105;int n;abcd a[N];int f[N][N];class ScoresSequence{public:  int count(vector <int> s){    n=s.size();    for (int i=1;i<=n;i++) a[i]=abcd(s[i-1],i); cl(f);    for (int i=1;i<=n;i++) f[i][i]=1;    int t=n;    while (t){      sort(a+1,a+t+1);      if (a[t].first==0) break;      for (int i=1;i<=a[t].first;i++)    f[a[t].second][a[i].second]=1;      for (int i=a[t].first+1;i<t;i++)    f[a[i].second][a[t].second]=1,a[i].first--;      t--;    }    for (int k=1;k<=n;k++)      for (int i=1;i<=n;i++)    for (int j=1;j<=n;j++)      f[i][j]|=f[i][k]&f[k][j];    int ans=0;    for (int i=1;i<=n;i++)      for (int j=1;j<=n;j++)    ans+=f[i][j];    return ans;  }  // BEGIN CUT HEREpublic:  void run_test(int Case) { if ((Case == -1) || (Case == 0)) test_case_0(); if ((Case == -1) || (Case == 1)) test_case_1(); if ((Case == -1) || (Case == 2)) test_case_2(); if ((Case == -1) || (Case == 3)) test_case_3(); if ((Case == -1) || (Case == 4)) test_case_4(); }private:  template <typename T> string print_array(const vector<T> &V) { ostringstream os; os << "{ "; for (typename vector<T>::const_iterator iter = V.begin(); iter != V.end(); ++iter) os << '\"' << *iter << "\","; os << " }"; return os.str(); }  void verify_case(int Case, const int &Expected, const int &Received) { cerr << "Test Case #" << Case << "..."; if (Expected == Received) cerr << "PASSED" << endl; else { cerr << "FAILED" << endl; cerr << "\tExpected: \"" << Expected << '\"' << endl; cerr << "\tReceived: \"" << Received << '\"' << endl; } }  void test_case_0() { int Arr0[] = {2, 0, 1}; vector <int> Arg0(Arr0, Arr0 + (sizeof(Arr0) / sizeof(Arr0[0]))); int Arg1 = 6; verify_case(0, Arg1, count(Arg0)); }  void test_case_1() { int Arr0[] = {1, 0, 2}; vector <int> Arg0(Arr0, Arr0 + (sizeof(Arr0) / sizeof(Arr0[0]))); int Arg1 = 6; verify_case(1, Arg1, count(Arg0)); }  void test_case_2() { int Arr0[] = {1, 1, 1}; vector <int> Arg0(Arr0, Arr0 + (sizeof(Arr0) / sizeof(Arr0[0]))); int Arg1 = 9; verify_case(2, Arg1, count(Arg0)); }  void test_case_3() { int Arr0[] = {0, 2, 8, 4, 3, 9, 1, 5, 7, 6}; vector <int> Arg0(Arr0, Arr0 + (sizeof(Arr0) / sizeof(Arr0[0]))); int Arg1 = 55; verify_case(3, Arg1, count(Arg0)); }  void test_case_4() { int Arr0[] = {22,20,14,13,17,15,12,18,23,15,21,26,33,5,19,9,37,0,25,28,4,12,35,32,25,7,31,6,2,29,10,33,36,27,39,28,40,3,8,38,3}; vector <int> Arg0(Arr0, Arr0 + (sizeof(Arr0) / sizeof(Arr0[0]))); int Arg1 = 1422; verify_case(4, Arg1, count(Arg0)); }  // END CUT HERE};// BEGIN CUT HEREint main(){  ScoresSequence ___test;  ___test.run_test(-1);  getch() ;  return 0;}// END CUT HERE