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())
  v_list = list(map(int,input().split()))
  odd_list = []
  even_list = []
  
  for i in range(n):
      if i % 2 == 0:
          odd_list.append(v_list[i]) 
      else:
          even_list.append(v_list[i])
  
  import collections
  
  odd_list_c = collections.Counter(odd_list)
  even_list_c = collections.Counter(even_list)
  
  if odd_list_c.most_common()[0][0] != even_list_c.most_common()[0][0]:
      ans = n - odd_list_c.most_common()[0][1] - even_list_c.most_common()[0][1]
  else:
      if len(even_list_c) == 1 && len(odd_list_c) == 1:
          ans = n // 2
      else: 
          if odd_list_c.most_common()[0][1] >= even_list_c.most_common()[0][1]:
              ans = n - odd_list_c.most_common()[0][1] - even_list_c.most_common()[1][1]
          elif odd_list_c.most_common()[0][1] < even_list_c.most_common()[0][1]:
              ans = n - odd_list_c.most_common()[1][1] - even_list_c.most_common()[0][1]
  
  print(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 /\\/\\/\\/."}]