using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main(string[] args)
    {
        var N = sc.ReadInt();
        var O = new int[N / 2];
        var E = new int[N / 2];
        for (int i = 0; i < N; i++)
        {
            if (i % 2 == 0)
            {
                E[i / 2] = sc.ReadInt();
            }
            else
            {
                O[i / 2] = sc.ReadInt();
            }
        }

        var ans1 = 0;
        var ans2 = 0;
        var og = O.GroupBy(x => x).OrderByDescending(g => g.Count()).ToArray();
        var eg = E.GroupBy(x => x).OrderByDescending(g => g.Count()).ToArray();

        ans1 += N / 2 - og[0].Count();
        var eg2 = eg.Where(g => g.Key != og[0].Key).ToArray();
        var ec = eg2.Length > 0 ? eg2[0].Count() : 0;
        ans1 += N / 2 - ec;

        ans2 += N / 2 - eg[0].Count();
        var og2 = og.Where(g => g.Key != eg[0].Key).ToArray();
        var oc = og2.Length > 0 ? og2[0].Count() : 0;
        ans2 += N / 2 - oc;

        var ans = Math.Min(ans1, ans2);
        Console.WriteLine(ans);
    }
    static int MOD = (int)1e9 + 7;
    static int INF = (int)1e7 + 1;
    static long LINF = (long)1e13 + 1;
    static Scanner sc = new Scanner();
}

class Scanner
{
    string[] S = new string[0];
    int Index = 0;
    char[] Separators = new char[] { ' ' };

    public string Next()
    {
        if (this.Index < this.S.Length) return this.S[this.Index++];
        var line = "";
        while (line == "") line = Console.ReadLine();
        this.S = line.Split(this.Separators, StringSplitOptions.RemoveEmptyEntries);
        if (this.S.Length == 0) return this.Next();
        this.Index = 0;
        return this.S[this.Index++];
    }
    public string ReadStr()
    {
        return this.Next();
    }
    public char ReadChar()
    {
        return this.Next()[0];
    }
    public int ReadInt()
    {
        return int.Parse(this.Next());
    }
    public uint ReadUInt()
    {
        return uint.Parse(this.Next());
    }
    public long ReadLong()
    {
        return long.Parse(this.Next());
    }
    public double ReadDouble()
    {
        return double.Parse(this.Next());
    }
    public int[] ReadIntArray(int n)
    {
        var array = new int[n];
        for (int i = 0; i < array.Length; i++)
        {
            array[i] = this.ReadInt();
        }
        return array;
    }
    public long[] ReadLongArray(int n)
    {
        var array = new long[n];
        for (int i = 0; i < array.Length; i++)
        {
            array[i] = this.ReadLong();
        }
        return array;
    }
    public double[] ReadDoubleArray(int n)
    {
        var array = new double[n];
        for (int i = 0; i < array.Length; i++)
        {
            array[i] = this.ReadDouble();
        }
        return array;
    }
    public char[] ReadCharArray(int n)
    {
        var array = new char[n];
        for (int i = 0; i < array.Length; i++)
        {
            array[i] = this.ReadChar();
        }
        return array;
    }
    public string[] ReadStrArray(int n)
    {
        var array = new string[n];
        for (int i = 0; i < array.Length; i++)
        {
            array[i] = this.ReadStr();
        }
        return array;
    }
}



Measured memory_bytes: 39120