output_description: If we can choose K integers as above, print `YES`; otherwise, print `NO`.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      N K
attempt: A,B=map(int, input() .split())
  if int(A / 2) + 1 =< B:
       print(YES)
  else:print
problem_description: Statement
  
  Determine if we can choose K different integers between 1 and N (inclusive) so
  that no two of them differ by 1.
samples: [{"input": "3 2", "output": "YES\n    \n\nWe can choose 1 and 3.\n\n* * *"}, {"input": "5 5", "output": "NO\n    \n\n* * *"}, {"input": "31 10", "output": "YES\n    \n\n* * *"}, {"input": "10 90", "output": "NO"}]