func_code_string: #include <bits/stdc++.h>   using namespace std;   const int INF = 2147483647;   const int N = 100005;   int n, i, tab[N], res, act, a, was[N];   int main() {     scanf( %d , &n);     for (i = 0; i < n; i++) scanf( %d , &tab[i]);     res = 0;     act = 0;     for (i = 0; i < n; i++) {       scanf( %d , &a);       was[a] = 1;       if (a != tab[act])         res++;       else {         act++;         while (act < n && was[tab[act]]) act++;       }     }     printf( %d n , res);     return 0;   }   