#include<bits/stdc++.h>
using namespace std;
const int N=1e5+12;
int n;
string a,b;
int pa[N],pb[N];
bool check(string s)
{
    for(int i=0;i<n-1;i++)
    {
        if( a[i]!='0' && b[i]!='0'  ) return 0;
    }
    return 1;
}
int main(){
    cin>>n;
    cin>>a>>b;
    if( check(a) && check(b) ) cout<<1;
    else cout<<0;
}