output_description: Print the kyu M-kun has, as an integer. For example, if he has 8-kyu, print
  `8`.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      X
attempt: N = int(input())
  souba = list(map(int, input().split()))
  urikaiba = list()
  money = 1000
  num = 0
  for i in range(1, N - 1):
      if (
          (souba[i] - souba[i - 1]) * (souba[i + 1] - souba[i]) <= 0
          and ((souba[i] - souba[i - 1]) != 0 or (souba[i + 1] - souba[i]) != 0)
          and (souba[i] - souba[i - 1]) != 0
      ):
          urikaiba.append(souba[i])
  urikaiba.insert(0, souba[0])
  urikaiba.append(souba[N - 1])
  for i in range(len(urikaiba) - 1):
      if urikaiba[i + 1] - urikaiba[i] > 0:
          num = money // urikaiba[i]
          money = money - num * urikaiba[i]
      elif urikaiba[i + 1] - urikaiba[i] < 0:
          money = money + num * souba[i]
          num = 0
  if num == 0:
      print(money)
  else:
      print(money + num * souba[N - 1])
  
problem_description: Statement
  
  M-kun is a competitor in AtCoder, whose highest rating is X.  
  In this site, a competitor is given a _kyu_ (class) according to his/her
  highest rating. For ratings from 400 through 1999, the following kyus are
  given:
  
    * From 400 through 599: 8-kyu
    * From 600 through 799: 7-kyu
    * From 800 through 999: 6-kyu
    * From 1000 through 1199: 5-kyu
    * From 1200 through 1399: 4-kyu
    * From 1400 through 1599: 3-kyu
    * From 1600 through 1799: 2-kyu
    * From 1800 through 1999: 1-kyu
  
  What kyu does M-kun have?
samples: [{"input": "725", "output": "7\n    \n\nM-kun's highest rating is 725, which corresponds to 7-kyu.  \nThus, `7` is the correct output.\n\n* * *"}, {"input": "1600", "output": "2\n    \n\nM-kun's highest rating is 1600, which corresponds to 2-kyu.  \nThus, `2` is the correct output."}]