output_description: If the concatenation of a and b in this order is a square number, print `Yes`;
  otherwise, print `No`.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      a b
attempt: print(["Yes", "No"][int(input().replace(" ", "")) ** 0.5 % 1 > 0])
  
problem_description: Statement
  
  AtCoDeer the deer has found two positive integers, a and b. Determine whether
  the concatenation of a and b in this order is a square number.
samples: [{"input": "1 21", "output": "Yes\n    \n\nAs 121 = 11 \u00d7 11, it is a square number.\n\n* * *"}, {"input": "100 100", "output": "No\n    \n\n100100 is not a square number.\n\n* * *"}, {"input": "12 10", "output": "No"}]