func_code_string: #include <bits/stdc++.h>   using namespace std;   vector<pair<int, int> > E[1010];   int deg[1010], vis[1010];   vector<pair<int, pair<int, int> > > ans;   int N, P;   int main() {     int u, v, d;     while (~scanf( %d%d , &N, &P)) {       for (int i = 0; i < N; i++) deg[i] = 0, E[i].clear();       for (int i = 0; i < P; i++)         scanf( %d%d%d , &u, &v, &d), u--, v--, deg[v]++,             E[u].push_back(make_pair(v, d));       ans.clear();       for (int i = 0; i < N; i++)         if (deg[i] == 0) {           int dd = 1 << 30, u = i;           for (u = i; E[u].size() > 0; u = E[u][0].first)             dd = min(dd, E[u][0].second);           if (dd < (1 << 30)) ans.push_back(make_pair(i, make_pair(u, dd)));         }       sort(ans.begin(), ans.end());       printf( %d n , ans.size());       for (int i = 0; i < ans.size(); i++)         printf( %d %d %d n , ans[i].first + 1, ans[i].second.first + 1,                ans[i].second.second);     }     return 0;   }   