func_code_string: #include <bits/stdc++.h>   using namespace std;   const int mod = 1e9 + 9;   const int mod1 = 999999937;   const int inf = 2e9;   const double eps = 1e-7;   int d[101][101];   int main() {     int n, m;     cin >> n >> m;     for (int i = 0; i < m; i++) {       int a, b, c;       cin >> a >> b >> c;       d[a - 1][b - 1] = c;     }     int ans = 0;     int w = n;     while (w--) {       for (int i = 0; i < n; i++) {         for (int j = 0; j < n; j++) {           for (int k = 0; k < n; k++) {             if (d[i][j] > 0 && d[j][k] > 0) {               int q = min(d[i][j], d[j][k]);               d[i][j] -= q;               d[j][k] -= q;               d[i][k] += q;             }           }         }       }     }     for (int i = 0; i < n; i++) {       for (int j = 0; j < n; j++) {         ans += d[i][j];       }     }     cout << ans;     return 0;   }   