#include <iostream>
#include <vector>
#include <cmath>
#include <numeric>
#include <algorithm>
#include <set>
#include <unordered_set>
#include <cstring>
#include <unordered_map>
#include <iomanip>
#include <queue>
#include <map>
#include <sstream>
#include <stack>
#include <bitset>
#include <random>

using ll = long long;

using namespace std;

constexpr int nm = 32;

void solve() {
    int n;
    string s, p;
    cin >> n >> s >> p;

    if (s == p) {
        cout << "YES\n";
        return;
    }

    if (p == string(n, '0') || p == string(n, '1')) {
        cout << "NO\n";
        return;
    }

    cout << "YES\n";
}

int main() {
    #ifdef LOCAL
    freopen("input.txt", "r", stdin);
    // freopen("output.txt", "w", stdout);
    #endif
    ios::sync_with_stdio(0);
    cin.tie(0);
    int t;
    cin >> t;
    while (t--) solve();
}