내 풀이

import java.util.Scanner;
public class Solution {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();   
        for(int j = 1 ; j <=n ; j++){
        int index = 1;
           while(index <=j){
                System.out.print("*");
               ++index;
           }
            System.out.println();
         }          
        }    
    }