#include <bits/stdc++.h>

using namespace std;

#define int int64_t
#define el '\n'

void run_case(int tc) {
  int n;
  cin >> n;
  string s, p;
  cin >> s >> p;
  for (int i = 0; i < n; i++) {
    if (s[i] != p[i]) {
      if (p[i] == '0') {
        s[i] = '0';
        if (i > 0 && s[i - 1] == '1') continue;
        else if (i < n - 1) s[i + 1] = '1';
        else return cout << "NO\n", void();
      } else {
        s[i] = '1';
        if (i > 0 && s[i - 1] == '0') continue;
        else if (i < n - 1) s[i + 1] = '0';
        else return cout << "NO\n", void();
      }
    }
  }
  cout << "YES\n";
}

int32_t main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int _t = 1;
  cin >> _t;
  for (int i = 1; i <= _t; i++) {
    run_case(i);
  }
}