#include <bits/stdc++.h>
using namespace std;
#define int long long
// #define endl '\n'
typedef pair<int,int>pii;
const int N=2e5+10;

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') {
            cout<<0<<endl;
            return;
        }
    }
    cout<<1<<endl;
}
signed main(){
    std::ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int T = 1;
    // cin >> T;
    while (T--) {
        solve();
    }
    return 0;
}