#include <bits/stdc++.h>
using namespace std;

#define ull unsigned long long
#define ll long long

void solve() {
    int n;
    cin >> n;
    string a,b;
    cin >> a >> b;
    for (int i = 0; i < n; i++) {
        if (a[i] == '1' || b[i] == '1') continue;
        cout << 0;
        return;
    }
    cout << 1;
}

signed main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int t;
    t = 1;
    for (int i = 0; i < t; i++) {
        solve();
    }
    return 0;
}