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: Accepted)

using System;
using System.Collections.Generic;
using System.IO;
using System.Runtime.Remoting.Messaging;
using System.Security.Cryptography;
using System.Text;

namespace Contest
{
    class Program
    {

        public void Solve()
        {
            var sc = new Scanner();
            int A = sc.NextInt();
            int B = sc.NextInt();
            int C = sc.NextInt();
            Console.WriteLine(A == B && B == C ? "Yes" : "No");

        }


        static void Main(string[] args) => new Program().Solve();
    }

    class Scanner
    {
        private char _separator = ' ';
        private StreamReader _stream = new StreamReader(Console.OpenStandardInput());
        private int _pos = 0;
        private string[] _line = new string[0];
        public string Next()
        {
            if (_pos >= _line.Length)
            {
                _line = _stream.ReadLine().Split(_separator);
                _pos = 0;
            }
            return _line[_pos++];
        }
        public int NextInt() => int.Parse(Next());
        public long NextLong() => long.Parse(Next());
        public double NextDouble() => double.Parse(Next());
        public string[] Array()
        {
            if (_pos >= _line.Length)
                _line = _stream.ReadLine().Split(_separator);
            _pos = _line.Length;
            return _line;
        }
        public int[] IntArray()
        {
            var arr = Array();
            var res = new int[arr.Length];
            for (int i = 0; i < arr.Length; i++)
            {
                res[i] = int.Parse(arr[i]);
            }
            return res;
        }
        public long[] LongArray()
        {
            var arr = Array();
            var res = new long[arr.Length];
            for (int i = 0; i < arr.Length; i++)
            {
                res[i] = long.Parse(arr[i]);
            }
            return res;
        }
        public double[] DoubleArray()
        {
            var arr = Array();
            var res = new double[arr.Length];
            for (int i = 0; i < arr.Length; i++)
            {
                res[i] = double.Parse(arr[i]);
            }
            return res;
        }
    }
}