func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxn = 500;   int dist[maxn][maxn];   long long ans;   void modify(int u, int v, int w) {     if (dist[u][v] > w) {       ans -= (dist[v][u] - w);       dist[u][v] = w;     }     return;   }   int main() {     int n;     cin >> n;     for (int i = 1; i <= n; i++) {       for (int j = 1; j <= n; j++) {         cin >> dist[i][j];         if (j > i) {           ans += dist[i][j];         }       }     }     int k;     cin >> k;     for (int i = 1; i <= k; i++) {       int u, v, w;       cin >> u >> v >> w;       modify(u, v, w);       if (dist[u][v] != dist[v][u]) {         dist[v][u] = dist[u][v];       }       for (int p = 1; p <= n; p++) {         for (int q = 1; q <= n; q++) {           modify(p, q, dist[p][u] + dist[v][q] + w);           if (dist[p][q] != dist[q][p]) {             dist[q][p] = dist[p][u] + dist[v][q] + w;           }         }       }       cout << ans << endl;     }     return 0;   }   