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: a,b = map(int,input().split())
  if (b == 100):
      AB = a * 1000 + b
  else if(b > 9):
      AB = a * 100 + b
  else:
      AB = a * 10 + b
  cnt = 1
  ans = False
  while(True):
      x = cnt * cnt
      if(x == AB):
          ans = True
      if(x > AB):
          break
      cnt += 1
  if(ans):
      print("Yes")
  else:
      print("No")
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"}]