func_code_string: #include <bits/stdc++.h>   int ar[100000];   int main() {     int i, j, m, n, total = 0, a, b, c;     scanf( %d %d , &n, &m);     if (m == 0 || n == 1)       printf( 0 );     else {       for (j = 1; j <= m; j++) {         scanf( %d %d %d , &a, &b, &c);         ar[a] += c;         ar[b] -= c;       }       for (i = 1; i <= n; i++) {         if (ar[i] < 0) total += ar[i];       }       total = -1 * total;       printf( %d , total);     }     return 0;   }   