using System;
public class Program
{
public static void Main()
//Q8. Write a program to print following pattern.
//1
//2 3
//4 5 6
//7 8 9 10
int i;
int print = 1;
for (i = 1; i < 5; i++)
int j;
for (j = 1; j <= i; j++)
Console.Write(print);
print++;
}
Console.WriteLine();