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: from collections import defaultdict
  
  
  def getN():
      return int(input())
  
  
  def getMN():
      a = input().split()
      b = [int(i) for i in a]
      return b[0], b[1]
  
  
  def getlist():
      a = input().split()
      b = [int(i) for i in a]
      return b
  
  
  n = getN()
  nums = getlist()
  lis1 = defaultdict(int)
  lis2 = defaultdict(int)
  
  for i, s in enumerate(nums):
      if i % 2 == 0:
          lis1[s] += 1
      else:
          lis2[s] += 1
  
  maxk1 = []
  maxv1 = 0
  for k in lis1.keys():
      if lis1[k] == maxv1:
          maxk1.append(k)
      elif lis1[k] > maxv1:
          maxv1 = lis1[k]
          maxk1 = [k]
  
  maxk2 = []
  maxv2 = 0
  for k in lis2.keys():
      if lis2[k] == maxv2:
          maxk2.append(k)
      elif lis2[k] > maxv2:
          maxv2 = lis2[k]
          maxk2 = [k]
  
  v1 = list(lis1.values())
  v1.sort(reverse=True)
  v1 = v1 + [0]
  v2 = list(lis2.values())
  v2.sort(reverse=True)
  v2 = v2 + [0]
  
  if (len(maxk1) == 1) and (len(maxk2) == 1) and (maxk1[0] == maxk2[0]):
      rem = max(v1[0] + v2[1], v2[0] + v1[1])
      ans = n - rem
  
  else:
      ans = n - maxv1 - maxv2
  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 /\\/\\/\\/."}]