func_code_string: #include <bits/stdc++.h>   using namespace std;   int dept[105], lend[105];   int main() {     int n, m, a, b, c, sum = 0;     scanf( %d%d , &n, &m);     for (int i = 0; i < m; ++i) {       scanf( %d%d%d , &a, &b, &c);       lend[b] += c;       dept[a] += c;     }     for (int i = 1; i <= n; ++i) {       if (lend[i] < dept[i]) sum += dept[i] - lend[i];     }     cout << sum;     return 0;   }   