func_code_string: #include <bits/stdc++.h>   using namespace std;   int p_arr[200005];   int main() {     int n, in, cnt, x, arr[200005];     std::cin >> n;     queue<int> q;     for (int i = 1; i <= n; i++) {       std::cin >> in;       q.push(in);     }     for (int i = 1; i <= n; i++) {       std::cin >> arr[i];     }     cnt = 0;     for (int i = 1; i <= n; i++) {       x = q.front();       while (p_arr[x] == -1) {         q.pop();         x = q.front();       }       x = q.front();       if (x == arr[i]) {         q.pop();       } else {         cnt++;         p_arr[arr[i]] = -1;       }     }     std::cout << cnt <<   n ;     return 0;   }   