Problem to understand a program output

Question

using System;

class sample

{

public static void Main()

{

int x = 1024 * 1024 * 1024;

uint p = 1024 * 1024 * 1024;

int y = -42;

Console.WriteLine("LEFT SHIFT OPERATIONS :");

Console.WriteLine("{0},{1},{2}", x, x * 2, x << 1);

Console.WriteLine("{0},{1},{2}", p, p * 2, p << 1);

Console.WriteLine("{0},{1},{2}", x, x * 4, x << 2);

Console.WriteLine("{0},{1},{2}", p, p * 4, p << 2);

Console.WriteLine("{0},{1},{2}", y, y * 1024 * 1024 * 64, x << 26);

Console.ReadLine();

}

}

 

the output are:

 

i could not understand output

 

kindly help 

 

LEFT SHIFT OPERATIONS : 

1073741824,-2147483648,-2147483648 

1073741824,2147483648,2147483648 

1073741824,0,0 

1073741824,0,0 

-42,1476395008,0