func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxN = 200005;   int P[maxN];   int color[maxN];   int cycle_count = 0;   void dfs(int s) {     color[s] = 1;     if (color[P[s]] == 0)       dfs(P[s]);     else if (color[P[s]] == 1)       ++cycle_count;     color[s] = 2;   }   int main() {     int n;     cin >> n;     int res = 1;     for (int i = 1; i <= n; ++i) scanf( %d , &P[i]);     for (int i = 1; i <= n; ++i) {       int b;       scanf( %d , &b);       res ^= b;     }     for (int i = 1; i <= n; ++i)       if (color[i] == 0) dfs(i);     if (cycle_count > 1) res += cycle_count;     cout << res << endl;     return 0;   }   