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.Linq;

namespace exawizards2019
{
    class Program
    {
        static void Main(string[] args)
        {
            var ABC = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
            var A = ABC[0];
            var B = ABC[1];
            var C = ABC[2];

            if (A <= 0 || B <= 0 || C <= 0)
            {
                Console.WriteLine("No");
                return;
            }

            if (A == B && B == C)
            {
                Console.WriteLine("Yes");
                return;
            }

            Console.WriteLine("No");
        }
    }
}