알고리즘 - 백준, 2438번 별찍기 -1

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 <= i ; j++){
                sb.append("*");
                if(j== i){
                    sb.append("\n");
                }
            }
        }
        
        String result = sb.toString();
        
        System.out.print(result);
    }
}