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

int main()
{
    int n; int m;
	cin >> n;
	for (int i = 0; i < n; i++){
		cin >> m; string b1; string b2;
		cin >> b1; cin >> b2;
		for (int j = 0; j < m - 1; j++){
			if (b1[j] != b2[j]){
				b1[j] = ((b1[j] == '1') ? '0': '1');
				b1[j+1] = ((b1[j+1] == '1') ? '0': '1');
			}
		}
		if (b1 == b2){
			cout << "YES" << endl;
		}
		else{
			cout << "NO" << endl;	
		}
	}
	return 0;
}