题解 | #牛牛的字符矩形#

#include <iostream>
using namespace std;

int main() {
    char a;

    cin >> a;

    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 3; j++) {
            cout << a;
        }
        cout << endl;
    }

    return 0;
}