output_description: Print the minimum number of elements that needs to be replaced.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      n
      v_1 v_2 ... v_n
attempt: import sys
  import socket
  from collections import Counter
  
  if socket.gethostname() in ["N551J", "F551C"]:
      sys.stdin = open("c1.in")
  
  
  def read_int_list():
      return list(map(int, input().split()))
  
  
  def read_int():
      return int(input())
  
  
  def read_str_list():
      return input().split()
  
  
  def read_str():
      return input()
  
  
  def solve():
      n = read_int()
      a = read_int_list()
      c = [Counter(a[k::2]) for k in range(2)]
      a, b = [c[k].most_common(1)[0] for k in range(2)]
  
      if a[0] != b[0]:
          return n - a[1] - b[1]
      if a[1] == n // 2 and b[1] == n // 2:
          return n // 2
  
      res = n
      if a[1] < n // 2:
          p, q = c[0].most_common(2)
          res = min(res, n - q[1] - b[1])
      if b[1] < n // 2:
          p, q = c[1].most_common(2)
          res = min(res, n - a[1] - q[1])
  
      return res
  
  
  def main():
      res = solve()
      print(res)
  
  
  if __name__ == "__main__":
      main()
  
problem_description: Statement
  
  A sequence a_1,a_2,... ,a_n is said to be /\/\/\/ when the following
  conditions are satisfied:
  
    * For each i = 1,2,..., n-2, a_i = a_{i+2}.
    * Exactly two different numbers appear in the sequence.
  
  You are given a sequence v_1,v_2,...,v_n whose length is even. We would like
  to make this sequence /\/\/\/ by replacing some of its elements. Find the
  minimum number of elements that needs to be replaced.
samples: [{"input": "4\n    3 1 3 2", "output": "1\n    \n\nThe sequence 3,1,3,2 is not /\\/\\/\\/, but we can make it /\\/\\/\\/ by replacing\none of its elements: for example, replace the fourth element to make it\n3,1,3,1.\n\n* * *"}, {"input": "6\n    105 119 105 119 105 119", "output": "0\n    \n\nThe sequence 105,119,105,119,105,119 is /\\/\\/\\/.\n\n* * *"}, {"input": "4\n    1 1 1 1", "output": "2\n    \n\nThe elements of the sequence 1,1,1,1 are all the same, so it is not /\\/\\/\\/."}]