#include<bits/stdc++.h>
#define ll          long long
#define nl          '\n'
#define F           first
#define S           second
#define pb          push_back
#define all(a)      (a.begin()),(a.end())
#define Input       freopen("in.txt","r",stdin)
#define Output      freopen("out.txt","w",stdout)
#define PI          2*acos(0.0)
#define MOD         1000000007
using namespace std;


const int N = 2e5 + 5;

void Solve()
{
    int n;
    cin >> n;
    string s, t;
    cin >> s >> t;
    for (int i = n - 1; i > 0; i--)
    {
        if (s[i] != t[i])
        {
            if (s[i] == '0') {
                s[i] = '1';
                s[i - 1] = '0';
            }
            else
            {
                s[i] = '0';
                s[i - 1] = '1';
            }
        }
    }
    if (s[0] != t[0] and n > 1)
    {
        if (t[0] == '1') {
            s[0] = '1';
            s[1] = '0';
        }
        else {
            s[0] = '0';
            s[1] = '1';
        }
    }
    if (s == t)
        cout << "YES\n";
    else
        cout << "NO\n";
}

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    int t, T = 1;
    cin >> T;
    for (t = 1; t <= T; t++)
        Solve();
    return 0;
}