#include <bits/stdc++.h>   using namespace std;   int main() {     int n, arr[200005];     string swaps;     cin >> n;     for (int i = 1; i <= n; i++) cin >> arr[i];     cin >> swaps;     int m = 0, flag = 0;     for (int i = 1; i < n; i++) {       m = max(m, arr[i]);       if (swaps[i - 1] ==  0  && m > i) {         flag = 1;         break;       }     }     (flag) ? cout <<  NO n  : cout <<  YES n ;     return 0;   }   