using System;
public class Program
{
public static void Main()
Console.WriteLine("Wprowadź liczbę wierszy");
int n = int.Parse(Console.ReadLine());
int a=1;
for (int i = 1; i <= n; i++)
for (int j = 1; j <= a; j++)
Console.Write("*");
}
Console.WriteLine();
a=a+1;