#include <bits/stdc++.h>
using namespace std;

int main() {
	int t;
	cin>>t;
	while(t--)
	{
	    int n;
	    cin>>n;
	    string s,p;
	    cin>>s>>p;
	    int cnt=0;
	    for(int i=0;i<n;i++)
	    {
	        if(p[i]=='0'&&p[i+1]=='0')
	        {
	            cout<<"NO";
	            cnt=1;
	            break;
	        }
	        else
	            continue;
	    }
	    if(s==p)
	        cout<<"YES"<<endl;
	    else if(n==1)
	        cout<<"NO"<<endl;
	    else if(cnt==0)
	        cout<<"YES"<<endl;
	    else
	        cout<<endl;
	}

}