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 Control.Monad

main = do 
    a <- map read . words <$> getLine :: IO [Int]
    let tmp = head a  
    -- ass <- replicateM n (map read . words <$> getLine) :: IO [[Int]]
    if (length $ filter (==tmp) a) == 3 then  putStrLn "Yes" else putStrLn "No"