Problem:
Score : 100 points

Problem Statement

You are given three integers A, B and C.

Determine if there exists an equilateral triangle whose sides have lengths A, B and C.

Constraints

All values in input are integers.

1 \leq A,B,C \leq 100

Input

Input is given from Standard Input in the following format:

A B C

Output

If there exists an equilateral triangle whose sides have lengths A, B and C, print Yes; otherwise, print No.

Sample Input 1

2 2 2

Sample Output 1

Yes

There exists an equilateral triangle whose sides have lengths 2, 2 and 2.

Sample Input 2

3 4 5

Sample Output 2

No

There is no equilateral triangle whose sides have lengths 3, 4 and 5.

Solution in C# (Mono 4.6.2.0) (judge verdict: Wrong Answer)

using System;
using System.Linq;

namespace ARegularTriang
{
    class Program
    {
        private string Read()
        {
            return Console.ReadLine();
        }
        private int[] ReadInt()
        {
            return Read().Split().Select(int.Parse).ToArray();
        }

        public void C()
        {
            var a = ReadInt();
            var A = a[0];
            var B = a[1];
            var C = a[2];
            var str = "";

            str = a[0] == a[1] && a[1] == a[2] && a[2] == a[0] ? "YES" : "NO";

            Console.Write(str);
        }

        static void Main(string[] args)
        {
            new Program().C();
        }
    }
}