import java.io.PrintStream;
import java.util.Scanner;

public class Triangle 
{
    public static void main(String[] args) 
    {
	Scanner input = new Scanner(System.in);
	PrintStream output = System.out;
		
	int number;
	do 
	{
	    output.print("Enter a positive integer: ");
	    number = input.nextInt();
	} 
	while (number < 0);
		
	for (int n = 0; n < number; n++) 
	{
	    for (int i = 0; i <= n; i++) 
	    {
		output.print("*");
	    }
	    output.println();
	}
    }
}