func_code_string: #include <bits/stdc++.h>   using namespace std;   struct EDGE {     int to, next, w, co;   } e[100000];   int head[100], top, vis[100000];   void add(int u, int v, int w, int co) {     e[top].to = v;     e[top].w = w;     e[top].co = co;     e[top].next = head[u];     head[u] = top++;   }   struct _ {     int max_flow, co;   };   int dis[100], vvis[100], prep[100], pree[100];   queue<int> q;   deque<int> node;   void spfa(int s) {     memset(dis, 63, sizeof(dis));     memset(vvis, 0, sizeof(vvis));     dis[s] = 0;     q.push(s);     int i;     while (!q.empty()) {       s = q.front();       q.pop();       vvis[s] = 0;       int i;       for (i = head[s]; ~i; i = e[i].next) {         if (!e[i].w) continue;         if (dis[s] + e[i].co < dis[e[i].to]) {           dis[e[i].to] = dis[s] + e[i].co;           pree[e[i].to] = i;           prep[e[i].to] = s;           if (vvis[e[i].to]) continue;           vvis[e[i].to] = 1;           q.push(e[i].to);         }       }     }   }   _ dfs(int s, int t, int rest) {     int flow = 998244353, co = 0;     int temp = t;     _ rv;     while (t != s) {       flow = min(flow, e[pree[t]].w);       co += e[pree[t]].co;       t = prep[t];     }     if (co > 0) flow = min(flow, rest / co);     if (flow == 0) return rv = (_){0, 0};     t = temp;     while (t != s) {       temp = pree[t];       e[temp].w -= flow;       e[temp ^ 1].w += flow;       t = prep[t];     }     rv = (_){flow, co};     return rv;   }   long long EK(int s, int t, int rest) {     long long sum = 0;     _ _;     while (1) {       spfa(s);       if (dis[t] > 998244353) break;       _ = dfs(s, t, rest);       if (_.max_flow == 0) break;       sum += _.max_flow;       rest -= _.max_flow * _.co;     }     return sum;   }   int main() {     memset(head, 255, sizeof(head));     int n, k;     scanf( %d%d , &n, &k);     int i, j, t;     for (i = 1; i <= n; i++) {       for (j = 1; j <= n; j++) {         scanf( %d , &t);         if (t) {           add(i, j, t, 0);           add(j, i, 0, 0);           add(i, j, k, 1);           add(j, i, 0, -1);         }       }     }     long long ans = EK(1, n, k);     printf( %lld n , ans);     return 0;   }   