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 Ruby (2.3.3) (judge verdict: Accepted)

attrs = Array.new
while line = $stdin.gets
    attrs << line.chomp.split.map{|v| v.to_i }
end

attrs = attrs[0]

if attrs[0] != attrs[1] then
  puts "No"
elsif attrs[0] != attrs[2] then
  puts "No"
else
  puts "Yes"
end