using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine(IsSquare(16));

    }

​

    public static bool IsSquare(int value)

    {

        double result = Math.Sqrt(value);

        int squareRoot = (int)Math.Ceiling(result);

        return (value == (squareRoot * squareRoot));

    }

}