func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MAX_N = 100000 + 10;   int mod;   int n, m;   vector<int> E[MAX_N];   bool v[MAX_N];   int cnt;   void dfs(int u) {     if (v[u]) return;     v[u] = true;     ++cnt;     for (vector<int>::iterator e = E[u].begin(); e != E[u].end(); ++e) {       dfs(*e);     }   }   int main() {     cin >> n >> m >> mod;     for (int i = 0; i < m; ++i) {       int a, b;       scanf( %d%d , &a, &b);       --a, --b;       E[a].push_back(b), E[b].push_back(a);     }     memset(v, 0, sizeof v);     vector<int> comp;     for (int i = 0; i < n; ++i) {       if (!v[i]) {         cnt = 0;         dfs(i);         comp.push_back(cnt);       }     }     if (comp.size() == 1) {       cout << 1 % mod << endl;       return 0;     }     long long ans = 1, sum = 0;     for (vector<int>::iterator e = comp.begin(); e != comp.end(); ++e) {       ans = ans * (*e) % mod;       sum += *e;       sum %= mod;     }     for (int i = 0; i < comp.size() - 2; ++i) {       ans = ans * sum % mod;     }     cout << ans << endl;     return 0;   }   