Tripple Sum

using System;
using System.Collections.Generic;
using System.Linq;

namespace ExamPreparation
{
    class Startup
    {
        static void Main()
        {
            int[] numbers = Console.ReadLine()
                .Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries)
                .Select(int.Parse)
                .ToArray();
            int found = 0;

            for (int j = 0; j < numbers.Length; j++)
            {
                for (int k = j + 1; k < numbers.Length; k++)
                {
                    int sum = numbers[j] + numbers[k];

                    if (numbers.Contains(sum))
                    {
                        Console.WriteLine($"{numbers[j]} + {numbers[k]} == {sum}");
                        found++;
                    }
                }
            }

            if (found == 0)
            {
                Console.WriteLine("No");
            }
        }
    }
}