output_description: Print the answer.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      N i
attempt: n i = map(int,input().split())
  print((n - i) + 1)
  
problem_description: Statement
  
  There is an N-car train.
  
  You are given an integer i. Find the value of j such that the following
  statement is true: "the i-th car from the front of the train is the j-th car
  from the back."
samples: [{"input": "4 2", "output": "3\n    \n\nThe second car from the front of a 4-car train is the third car from the back.\n\n* * *"}, {"input": "1 1", "output": "1\n    \n\n* * *"}, {"input": "15 11", "output": "5"}]