func_code_string: #include <bits/stdc++.h>   using namespace std;   int a[1001][3] = {0};   int b[1001] = {0};   int c[1001] = {0};   vector<int> a1, a2, a3;   int main() {     int n, m, i, x, y, z;     int ans, t = 0;     scanf( %d%d , &n, &m);     for (i = 0; i < m; i++) {       scanf( %d%d%d , &x, &y, &z);       a[x][0] = y;       a[x][1] = z;       b[x]++;       c[y]++;     }     for (i = 1; i <= n; i++) {       if (b[i] == 1 && c[i] == 0) {         x = i;         ans = 1000001;         do {           if (a[x][0] > 0) {             ans = min(ans, a[x][1]);             x = a[x][0];           } else             break;         } while (1);         a1.push_back(i);         a2.push_back(x);         a3.push_back(ans);       }     }     printf( %d n , a1.size());     for (i = 0; i < a1.size(); i++) printf( %d %d %d n , a1[i], a2[i], a3[i]);     return 0;   }   