func_code_string: #include <bits/stdc++.h>   using namespace std;   long long int mod = 1e9 + 9;   const double error = 1e-7;   const double PI = acos(-1);   mt19937 rng(       (unsigned int)chrono::system_clock::now().time_since_epoch().count());   inline long long int MOD(long long int x, long long int m = mod) {     long long int y = x % m;     return (y >= 0) ? y : y + m;   }   const int inf = 1e9 + 2;   const long long int infl = 1e18 + 1;   const int nmax = 1e6 + 10;   int master[nmax];   void init(int n) {     for (int i = 1; i <= n; i++) master[i] = i;   }   int fnd(int u) {     if (master[u] == u) return u;     return master[u] = fnd(master[u]);   }   int unite(int a, int b) {     a = fnd(a), b = fnd(b);     if (rng() & 1) swap(a, b);     master[b] = a;     return a;   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     ;     int n, m;     cin >> n >> m;     init(n);     long long int two = 1;     for (int i = 0; i < m; i++) {       int a, b;       cin >> a >> b;       if (fnd(a) == fnd(b)) {         two *= 2;         two %= mod;       } else         unite(a, b);       cout << MOD(two - 1) <<   n ;     }   }   