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: n = int(input())
  list_v = list((map(int, input().split())))
  list_e = list_v[::2]
  list_o = list_v[1::2]
  dict_e = {}
  dict_o = {}
  for number in set(list_e):
      dict_e[number] = 0
  for i in range(0, int(n / 2)):
      dict_e[list_e[i]] += 1
  for number in set(list_o):
      dict_o[number] = 0
  for i in range(0, int(n / 2)):
      dict_o[list_o[i]] += 1
  e_max = 0
  o_max = 0
  for key in dict_e.keys():
      if dict_e[key] > e_max:
          e_max = dict_e[key]
          e_key = key
  
  for key in dict_o.keys():
      if dict_o[key] > o_max:
          o_max = dict_o[key]
          o_key = key
  ans = o_max + e_max
  if e_key == o_key:
      e_max2 = 0
      for key in dict_e.keys():
          if dict_e[key] > e_max2 and key != o_key:
              e_max2 = dict_e[key]
              e_key2 = key
      o_max2 = 0
      for key in dict_o.keys():
          if dict_o[key] > o_max2 and key != e_key:
              o_max2 = dict_o[key]
              o_key2 = key
      ans = max(e_max + o_max2, e_max2 + o_max)
  
  print(n - ans)
  
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 /\\/\\/\\/."}]