using System;

public class Program

{

    public static void Main()

    {

        int firstSide = int.Parse(Console.ReadLine());

        int secondSide = int.Parse(Console.ReadLine());

        int thirdSide = int.Parse(Console.ReadLine());

        firstSide *= firstSide;

        secondSide *= secondSide;

        thirdSide *= thirdSide;

        if ((firstSide == secondSide + thirdSide) || (secondSide == firstSide + thirdSide) || (secondSide == firstSide + thirdSide))

        {

            Console.WriteLine("да");

        }

        else 

        {

            Console.WriteLine("нет");

        }

​

​

    }

}