output_description: Print the answer.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      N i
attempt: import sys
  
  # 関数 solve は，もちろん，問題に応じて書き換える
  def solve(a, b):
        c=a-b+1
      return(c)
  # ここから下は，入力・出力形式が同じであれば，変えなくて良い．
  def readQuestion():
      line = sys.stdin.readline().rstrip()
      [str_a, str_b] = line.split(' ')
      return (int(str_a), int(str_b))
  
  def main():
      a, b = readQuestion()
      answer = solve(a, b)
      print(answer)
      
  if __name__ == '__main__':
      main()
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"}]