func_code_string: #include <bits/stdc++.h>   using namespace std;   const double EPS = 1e-9;   const int INF = 1 << 28;   const long long INFL = 1LL << 62;   int toi(string x) {     int z;     istringstream iss(x);     iss >> z;     return z;   }   string str[] = { YES ,  NO };   int modulo(int m, int n) { return m >= 0 ? m % n : (n - abs(m % n)) % n; }   using namespace std;   int arr[101] = {0}, n, m;   int main() {     cin >> n >> m;     for (int i = 1, a, b, c; i <= m; i++) {       cin >> a >> b >> c;       arr[a] -= c;       arr[b] += c;     }     int sum = 0;     for (int i = 1; i <= n; i++)       if (arr[i] > 0) sum += arr[i];     cout << sum << endl;     return 0;   }   