#include <bits/stdc++.h>
using namespace std;
int main()
{
    int t;
    cin >> t;
    while (t--)
    {
        int n;

        string s1,s2;
        cin>>n>>s1>>s2;
        int x=0;
        for(int i=1;i<n;i++){
            if((s1[i-1]=='0'&& s1[i]=='0')||(s2[i-1]=='1'&& s2[i]=='0') ){
                x=1;
            }
        }

        if(x==1)cout<<"YES"<<endl;
        else cout<<"NO"<<endl;
        
    }
}