#include <bits/stdc++.h>   using namespace std;   int main() {     ios::sync_with_stdio(false);     int i, j, t, n, a[150], b[150], sum1 = 0, sum2 = 0;     cin >> n;     for (i = 1; i <= n; i++) {       cin >> a[i];     }     for (i = 1; i <= n; i++) {       cin >> b[i];     }     for (i = 1; i <= n; i++) {       if (a[i] && !b[i]) sum1++;       if (!a[i] && b[i]) sum2++;     }     if (sum1 == 0) {       cout <<  -1  <<   n ;     } else if (sum1 > sum2) {       cout << 1 <<   n ;     } else {       int k = sum2 / sum1;       k++;       cout << k <<   n ;     }   }   