func_code_string: #include <bits/stdc++.h>   int n, m, i, j, w[2001][3], v[2001], ct, a, b, c, t, tt, r[2001][3];   int min(int a, int b) {     if (a > b) return b;     return a;   }   int main() {     scanf( %d%d , &n, &m);     for (i = 0; i < m; i++) {       scanf( %d%d%d , &a, &b, &c);       w[a][0] = b, w[b][1] = a, w[a][2] = c;     }     for (i = 1; i <= n; i++) {       if (w[i][1] == 0 && w[i][0] != 0) {         v[i] = 1;         t = w[i][0];         while (w[t][0] != 0) {           w[i][0] = w[t][0];           w[i][2] = min(w[i][2], w[t][2]);           tt = w[t][0];           w[t][0] = w[t][1] = w[t][2] = 0;           t = tt;         }       }     }     for (i = 1; i <= n; i++) {       if (w[i][0] != 0 && v[i] == 1)         r[ct][0] = i, r[ct][1] = w[i][0], r[ct++][2] = w[i][2];     }     printf( %d n , ct);     for (i = 0; i < ct; i++) printf( %d %d %d n , r[i][0], r[i][1], r[i][2]);   }   