2438 별 찍기 - 1

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
        int loopLeng = Integer.parseInt(buf.readLine());

        for (int i = 0; i < loopLeng; i++) {
            for (int j = 0; j <= i; j++) {
                System.out.print("*");
            }
            System.out.println("");
        }
    }
}