func_code_string: #include <bits/stdc++.h>   constexpr int Maxn = 53;   std::vector<int> e[Maxn];   int n, m;   int main() {     scanf( %d%d , &n, &m);     for (int i = 1, u, v; i <= m; ++i) {       scanf( %d%d , &u, &v);       if (u <= 50 && v <= 50) {         e[u].emplace_back(v);         e[v].emplace_back(u);       }     }     n = std::min(n, 50);     for (int i = 1; i <= n; ++i) std::sort(e[i].begin(), e[i].end());     for (int i = 1; i <= n; ++i)       for (int j = 1; j < i; ++j)         for (int k = 1; k < j; ++k)           for (int l = 1; l < k; ++l)             for (int r = 1; r < l; ++r) {               std::vector<int> vec = {i, j, k, l, r};               int cnt = 0;               for (int x : {0, 1, 2, 3, 4})                 for (int y = 0; y < x; ++y) {                   auto iter = std::lower_bound(e[vec[x]].begin(), e[vec[x]].end(),                                                vec[y]);                   if (iter == e[vec[x]].end() || *iter != vec[y]) ++cnt;                 }               if (cnt == 0 || cnt == 10) {                 printf( %d %d %d %d %d n , i, j, k, l, r);                 return 0;               }             }     puts( -1 );   }   