题解 | #正方形图案#

import java.util.Scanner;
import java.util.Collections;
public class Main{
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        while(scan.hasNextInt()) {
            int num = scan.nextInt();
            for(int i = 0; i < num; i++) {
                System.out.println(String.join(" ", Collections.nCopies(num, "*")));
            }
        }
    }
}