func_code_string: #include <bits/stdc++.h>   using namespace std;   long long mc[1 << 20];   list<int> th;   struct f {     long long x, k, m, ms[20];   } fs[100];   bool kcomp(f a, f b) { return a.k < b.k; }   int main() {     ios::sync_with_stdio(false);     cin.tie(0);     long long n, m, b;     cin >> n >> m >> b;     for (int i = 0; i < n; i++) {       cin >> fs[i].x >> fs[i].k >> fs[i].m;       for (int j = 0; j < fs[i].m; j++) {         cin >> fs[i].ms[j];         fs[i].ms[j]--;       }     }     sort(fs, fs + n, kcomp);     long long bst = -1;     fill_n(mc, 1 << 20, -1);     for (int i = 0; i < n; i++) {       int tbt = 0;       for (int mi = 0; mi < fs[i].m; mi++) {         tbt |= 1 << fs[i].ms[mi];       }       int old = mc[tbt];       mc[tbt] = mc[tbt] == -1 ? fs[i].x : min(mc[tbt], fs[i].x);       if (old == mc[tbt]) continue;       th.push_front(tbt);       auto it = th.begin();       auto pe = th.end();       {         auto it2 = it;         ++it2;         for (; it2 != pe; ++it2) {           int bt = *it | *it2;           if (mc[bt] == -1) th.push_back(bt);           mc[bt] =               mc[bt] == -1 ? mc[*it] + mc[*it2] : min(mc[bt], mc[*it] + mc[*it2]);         }       }       for (int cpos = 0; it != th.end(); ++it, ++cpos) {         auto it2 = pe;         auto ce = th.end();         for (; it2 != ce; ++it2) {           int bt = *it | *it2;           if (mc[bt] == -1) th.push_back(bt);           mc[bt] =               mc[bt] == -1 ? mc[*it] + mc[*it2] : min(mc[bt], mc[*it] + mc[*it2]);         }       }       if (mc[(1 << m) - 1] != -1) {         bst = bst == -1 ? mc[(1 << m) - 1] + b * fs[i].k                         : min(bst, mc[(1 << m) - 1] + b * fs[i].k);       }     }     cout << bst <<   n ;   }   