알고리즘 - 백준, 2442 별찍기 -5

import java.io.*;
import java.util.*;

public class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sb = new StringBuilder();
        
        int value= Integer.parseInt(br.readLine());
        
        for(int i=1; i <= value; i++){
            for(int j=1; j<=value-i; j++){
                sb.append(" ");
            }
            for(int k=1; k <=i; k++){
                sb.append("**");
            }
            sb.delete(sb.length()-1,sb.length());
            sb.append("\n");
        }
        String result = sb.toString();
        
        System.out.print(result);
    }
}