output_description: If there exists an equilateral triangle whose sides have lengths A, B and C,
  print `Yes`; otherwise, print `No`.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      A B C
attempt: x = [int(i) for i in input().split(" ")]
  y = "Yes" if x[0] ** 3 == x[0] * x[1] * x[2] else "No"
  print(y)
  
problem_description: 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.
samples: [{"input": "2 2 2", "output": "Yes\n    \n\n  * There exists an equilateral triangle whose sides have lengths 2, 2 and 2.\n\n* * *"}, {"input": "3 4 5", "output": "No\n    \n\n  * There is no equilateral triangle whose sides have lengths 3, 4 and 5."}]