#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define db double
#define pii pair<int,int>
#define fi first
#define se second
//cout<<setiosflags(ios::fixed)<<setprecision(K);
const int dx[4]={1,-1,0,0};
const int dy[4]={0,0,1,-1};
const double eps=1e-9; 
const double PI=acos(-1.0);
const int inf=1e9+7;
const int mod=998244353;
const int N=2e5+10,M=N<<1;

void solve(){
    int n;cin>>n;
    string s1,s2;
    cin>>s1>>s2;
    bool ok=1;
    for(int i=0;i<n;i++){
        int x=s1[i]-'0',y=s2[i]-'0';
        if(x+y==0||x+y==4||(x+y==2&&x!=1)) ok=0;
    }
    if(ok) cout<<1<<'\n';
    else cout<<0<<'\n';
}

signed main(){
    ios::sync_with_stdio(false);
    cin.tie(0);cout.tie(0);
    int T=1;
    //cin>>T;
    while(T--){
        solve();
    }
    return 0;
}