#include <bits/stdc++.h>
using namespace std;
     
const long long mod = 10000007;
const long long INF = LLONG_MAX;
const int N = 1001000;

void solve () {
    int n;
    string s, s1;

    cin >> n >> s1 >> s;

    if (n == 1) {
        if (s[0] != s1[0]) {
            cout << "NO";
            return;
        }
    }
    if (s[n - 2] == '1' && s[n - 1] == '1') {
        if (s1[n - 2] != '1' || s1[n - 1] != '1') {
            cout << "NO";
            return;
        }
    } else if (s[n - 2] == '0' && s[n - 1] == '0') {
        if (s1[n - 2] != '0' || s1[n - 1] != '0') {
            cout << "NO";
            return;
        }
    }
    cout << "YES";
} 
int main () {
    ios::sync_with_stdio(false);
    cin.tie(nullptr); 

    long long t;
    cin >> t;

    while (t--) {
        solve();
        cout << "\n";
    }
    return 0;
}