using System;
public class Program
{
public static void Main()
int N,b,a;
Console.WriteLine("enter number:");
N = Convert.ToInt32(Console.ReadLine());
b = 1;
a = 0;
for (int i = 1; i < N; i = i + 1)
b = b * 2;
if( N == b )
a = N;
}
else {
if( N == a )
Console.WriteLine ("Binary number: " + N);
Console.WriteLine ( "No binary ");