题解 | #金字塔图案#

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 = 1; i <= num; i++) {
                System.out.println(String.join("", Collections.nCopies(num - i, " ")) + 
                                 String.join("", Collections.nCopies(i, "* ")));
            }
        }
    }
}