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 Haskell (GHC 7.10.3) (judge verdict: Accepted)

import Data.List
import Data.Bool(bool)
readInt :: String->Int
readInt = read

main = do
 s <- map readInt.words<$>getLine
 putStrLn $ solve s

solve s = bool "No" "Yes" (all (==maximum s) s)