题解 | #空心三角形图案#

import java.util.Scanner;
public class Main {
    
    public static void main(String[] args) {
        
        Scanner sc = new Scanner(System.in);
        while(sc.hasNextInt()) {
            int n = sc.nextInt();
            for(int i = 0 ; i < n ; i++) {
                for(int j = 0 ; j <= i ; j++) {
                    if(j > 0 && j < i && i < n - 1) {
                        System.out.print("  ");
                    } else {
                        System.out.print("* ");
                    }
                }
                System.out.println();
            }
        }
    }
}