1400A - String Similarity - CodeForces Solution

//Idk how it works but it works
//¯\_(ツ)_/¯

#include <iostream>
#include <cmath>
#include <algorithm>
#include <vector>
#include <set>
#include <map>

using namespace std;

#define int long long
#define ll long long
#define cy cout << "YES"
#define cn cout << "NO"
#define eb emplace_back
#define itn int
#define fro for
#define cotu cout

void output( bool fl ) {
    if( fl ) cy;
    else cn;
    cout << endl;
}

int solve ( ) {
    int n;
    cin >> n;
    string s;
    cin >> s;
    for( int i = 0; i < n; i++ ) {
        cout << s[n - 1];
    }
    cout << endl;
}

main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin.exceptions(ios::badbit | ios::failbit);
    setlocale( LC_ALL, "Ukr" );

    int t = 1;
    cin >> t;
    while( t-- ) {
        solve();
    }
    return 0;
}