// Author: TrispdTit
// Date: 2024-11-14 15:46:03
//贪睡是一剂烈性毒品
#include <bits/stdc++.h>
#define endl '\n'
#define int long long
#define ll long long
using namespace std;

void solve() {
    int n; cin >> n;
    string a1; string a2;
    cin >> a1 >> a2;
    for (int i  = 0 ; i < n ; i ++){
        if(a1[i] != '1' && a2[i] != '1'){
            cout << "0" << endl;
            return ;
        }
    }
    cout << 1 << endl;
    
}
signed main() {
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    int t = 1;
    //cin >> t;
    while(t--) {
       solve();
    }

    return 0;
}