#include<bits/stdc++.h>
//Made by Stick_Man_
using namespace std;
#define int long long  
int n;
string n1,n2;
int solve(){
    for(int i=0;i<n;){
        if(n1[i]=='1'||n2[i]=='1'){
            if(i==n-1) return 1;
            else i++;
        }else return 0;
    }
}
signed main(){
    cin>>n>>n1>>n2;
    cout<<solve()<<'\n';
    return 0;
}