func_code_string: #include <bits/stdc++.h>   const int MaxN = 100111;   const int mod = 1000000009;   int f[MaxN];   int getFather(int x) {     if (f[x] == x) return f[x];     return f[x] = getFather(f[x]);   }   int main() {     int n, m;     scanf( %d%d , &n, &m);     for (int i = 1; i <= n; i++) f[i] = i;     int ans = 0;     for (int i = 0; i < m; i++) {       int x, y;       scanf( %d%d , &x, &y);       if (getFather(x) == getFather(y))         ans = ((ans * 2) % mod + 1) % mod;       else         f[getFather(y)] = getFather(x);       printf( %d n , ans % mod);     }     return 0;   }   