func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, k, p[111], c[111], l[111], bottleneck[111], par[111], cost[111][111];   bitset<200005> prime;   vector<vector<int> > vert;   int edmondskarp(int s, int t) {     int mf = 0;     while (1) {       memset(bottleneck, 0, sizeof(bottleneck));       bottleneck[s] = 1e9;       par[s] = s;       queue<int> q;       q.push(s);       while (!q.empty() && !bottleneck[t]) {         int u = q.front();         q.pop();         for (int i = 0; i < vert[u].size(); i++) {           int v = vert[u][i];           if (cost[u][v] > 0 && !bottleneck[v]) {             q.push(v);             par[v] = u;             bottleneck[v] = min(bottleneck[u], cost[u][v]);           }         }       }       if (!bottleneck[t]) break;       mf += bottleneck[t];       for (int u = t; par[u] != u; u = par[u]) {         cost[par[u]][u] -= bottleneck[t];         cost[u][par[u]] += bottleneck[t];       }     }     return mf;   }   int ok(int x) {     int idx = 0;     p[0] = -1;     for (int i = 1; i <= n; i++) {       if (c[i] == 1 && l[i] <= x && p[i] > p[idx]) {         idx = i;       }     }     vert.assign(111, vector<int>());     memset(cost, 0, sizeof(cost));     for (int i = 1; i <= n; i++) {       if (l[i] > x) continue;       if (c[i] & 1) continue;       if (c[i] == 1) continue;       for (int j = 1; j <= n; j++) {         if (l[j] > x) continue;         if (i == j) continue;         if (c[j] == 1) continue;         if (prime[c[i] + c[j]]) {           vert[i].push_back(j);           vert[j].push_back(i);           cost[i][j] = 1e9;         }       }     }     int s = 101, t = 102;     for (int i = 1; i <= n; i++) {       if (l[i] > x) continue;       if (c[i] & 1) continue;       if (c[i] == 1) continue;       vert[s].push_back(i);       vert[i].push_back(s);       cost[s][i] = p[i];     }     for (int i = 1; i <= n; i++) {       if (l[i] > x) continue;       if (!(c[i] & 1)) continue;       if (c[i] == 1) continue;       vert[i].push_back(t);       vert[t].push_back(i);       cost[i][t] = p[i];     }     if (idx) {       vert[idx].push_back(t);       vert[t].push_back(idx);       cost[idx][t] = p[idx];       for (int i = 1; i <= n; i++) {         if (l[i] > x) continue;         if (c[i] & 1) continue;         if (!prime[1 + c[i]]) continue;         vert[i].push_back(idx);         vert[idx].push_back(i);         cost[i][idx] = 1e9;       }     }     int sum = 0;     for (int i = 1; i <= n; i++) {       if (l[i] > x || c[i] == 1) continue;       sum += p[i];     }     if (idx) sum += p[idx];     int ek = edmondskarp(s, t);     return sum - ek >= k;   }   int main() {     scanf( %d %d , &n, &k);     for (int i = 1; i <= n; i++) {       scanf( %d%d%d , &p[i], &c[i], &l[i]);     }     prime.set();     prime[0] = prime[1] = 0;     for (long long i = 2; i <= 200000; i++) {       if (prime[i]) {         for (long long j = i * i; j <= 200000; j += i) {           prime[j] = 0;         }       }     }     if (!ok(n)) {       printf( %d n , -1);       return 0;     }     int lo = 0, hi = n;     while (hi - lo > 1) {       int m = (lo + hi) / 2;       if (ok(m))         hi = m;       else         lo = m;     }     printf( %d n , hi);     return 0;   }   