#include <bits/stdc++.h>

using namespace std;

int a(int n, string n1, string n2)
{
    if (n1[0]=='1' || n2[0]=='1') {
        if (n == 1) { return 1; }
        else { return a(n-1, n1.substr(1), n2.substr(1)); }
    } else {
        return 0;
    }
}

int main()
{
    int n; cin >> n;
    string n1, n2;
    cin >> n1 >> n2;
    cout << a(n, n1, n2) << endl;
}