#include<bits/stdc++.h>
#define endl "\n"
using namespace std;
using ll = long long;
int cnt[110];
const int mod = 998244353;
ll qpow(ll n,ll m)
{
    ll res=1;
    while(m)
    {
        if(m&1)
        {
            res=res*n%mod;
        }
        n=n*n%mod;
        m>>=1;
    }
    return res;
}
void solve(void)
{
    int n;
    cin>>n;
    string s1,s2;
    cin>>s1>>s2;
    for(int i=0;i<n;i++)
    {
        if(s1[i]=='1'||s2[i]=='1')
        {
            continue;
        }
        cout<<0<<endl;
        return;
    }
    cout<<1<<endl;
}
int main(void)
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int t=1;
    while(t--)
    {
        solve();
    }
    return 0;
}
/*
7
5 3 0 0 0 0 0 0 0
4 1 1 1 0 0 0 0 0
1 0 0 0 0 0 0 0 0
1 0 0 0 0 0 0 0 1
1 0 0 0 0 0 0 0 2
99 88 77 66 55 44 33 22 11
100 90 80 70 60 50 40 30 20
*/