func_code_string: #include <bits/stdc++.h>   using namespace std;   int people[105];   int main() {     int a, b, c;     memset(people, 0, sizeof(people));     int n, m;     scanf( %d%d , &n, &m);     for (int i = 0; i < m; i++) {       scanf( %d%d%d , &a, &b, &c);       people[a] -= c;       people[b] += c;     }     long long sum = 0;     for (int i = 1; i <= n; i++)       if (people[i] > 0) sum += people[i];     printf( %I64d n , sum);     return 0;   }   