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(map(int, input().split()))
  
  even_map = {}
  for i in range(0, n)[::2]:
      if v[i] not in even_map:
          even_map[v[i]] = 1
      else:
          even_map[v[i]] += 1
  
  odd_map = {}
  for i in range(1, n)[::2]:
      if v[i] not in odd_map:
          odd_map[v[i]] = 1
      else:
          odd_map[v[i]] += 1
  
  
  odd_list = list(odd_map.items())
  odd_list.sort(key=lambda x: x[1], reverse=True)
  even_list = list(even_map.items())
  even_list.sort(key=lambda x: x[1], reverse=True)
  
  odd = odd_list[0][0]
  even = even_list[0][0]
  
  if odd == even:
      if odd_list[0][1] > even_list[0][1]:
          if len(even_list) > 1:
              even = even_list[1][0]
          else:
              even = odd + 1
      else:
          if len(odd_list) > 1:
              odd = odd_list[1][0]
          else:
              odd = even + 1
  
  
  ans = 0
  for k, v in odd_map.items():
      if k != odd:
          ans += v
  for k, v in even_map.items():
      if k != even:
          ans += v
  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 /\\/\\/\\/."}]