F.java

import java.util.Scanner;

public class F {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Scanner s	= new Scanner(System.in);
		
		System.out.println("INPUT");
		System.out.print("a  : ");
		int a	= s.nextInt();
		
		System.out.println("\nOUTPUT");
		for(int i=1;i<=a;i++){
			for(int j=1;j<=i;j++){
				System.out.print("* ");
			}
			System.out.println();
		}

	}

}