题解 | #多组_字符串_T组形式#

#include <iostream>
using namespace std;

int main(){
    int t, n;
    cin >> t;
    for (int i = 0; i < t; i++) {
        cin >> n;
        char s[n];
        for (int j = 0; j < n; j++) {
            cin >> s[j];
        }    
        for (int j = n-1; j >= 0; j--) {
            cout << s[j];
        }
        cout << endl;
    }
    return 0;
}