#include <bits/stdc++.h>
                
using namespace std;
     
int n, cnt = 0; 
deque<int> a;
vector<int> b; 
int main()
{
    freopen("proposal.in", "r", stdin);
    freopen("proposal.out", "w", stdout);
            
    ios::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
                
    cin >> n;
    for(int i = 1; i <= n; ++i)
    {
        int x;
        cin >> x;
        a.push_back(x);
    }
    for(int i = 1; i <= n; ++i)
    {
        int x;
        cin >> x;
        b.push_back(x);
    }
    for(;;)
    {
        bool p = false;
        for(int i = 0; i < n; ++i)
            if(a[i] > b[i])
            {
                p = true;
                break;
            }
        if(p == false)
            break;
        cnt++;
        a.push_front(1);
        a.pop_back();
    }
    
    cout << cnt;
        
   	return 0;
}