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

int main() {
    int t;
    cin >> t;
    while (t--) {
        int n;
        cin >> n;
        string s;
        cin >> s;
        string p;
        cin >> p;
        for (int i = 0; i+1 < n; i++) {
            if (s[i] != p[i]) {
                if (s[i] == '0') {
                    s[i+1] = '0';
                } else {
                    s[i+1] = '1';
                }
            }
        }
        cout << (s[n-1] == p[n-1] ? "YES" : "NO") << "\n";
    }
}