fun main(args: Array<String>) {

    C.init()
    C.execute()

}

class C {

    companion object {
        var N = 0
        private var numberMap1 = mutableMapOf<Int, Int>()
        private var numberMap2 = mutableMapOf<Int, Int>()

        fun init() {

            N = readLine()!!.toInt()

            readLine()!!.split(" ").forEachIndexed { index, s ->

                val num = s.toInt()
                if (index % 2 == 0) {
                    if (numberMap1.containsKey(num)) {
                        numberMap1[num] = numberMap1[num]!! + 1
                    } else {
                        numberMap1[num] = 1
                    }
                } else {
                    if (numberMap2.containsKey(num)) {
                        numberMap2[num] = numberMap2[num]!! + 1
                    } else {
                        numberMap2[num] = 1
                    }
                }
            }
        }

        fun execute() {

            var num1Entry = numberMap1.maxBy {
                it.value
            }!!
            var num2Entry = numberMap2.maxBy {
                it.value
            }!!

            numberMap1.remove(num1Entry.key)
            numberMap2.remove(num2Entry.key)


            val num1MostSeeEntry = num1Entry
            val num2MostSeeEntry = num2Entry

            // 異なる数字かチェック
            if (num1Entry.key != num2Entry.key) {
                print(N - num1Entry.value - num2Entry.value)
                return
            }

            // 同じ数字の場合
            // 回数が異なる場合
            if (num1Entry.value > num2Entry.value) {
                // num1の方が多いってことは、num2には２個以上あるはず
                print(N - num1Entry.value - numberMap2.maxBy {
                    it.value
                }!!.value)
                return
            } else if (num1Entry.value < num2Entry.value) {
                // num2の方が多いってことは、num1には２個以上あるはず
                print(N - numberMap1.maxBy {
                    it.value
                }!!.value - num2Entry.value)
                return
            }

            // 同じ数字の場合
            // 回数も同じ場合
            if (numberMap1.size == 0) {
                print(num1Entry.value)
                return
            }

            // 同じ数字かつ出現回数が等しい場合
            // 次の値を見る
            num1Entry = numberMap1.maxBy { it.value }!!
            num2Entry = numberMap2.maxBy { it.value }!!

            if (num1Entry.value > num2Entry.value) {
                print(N - num1Entry.value - num2MostSeeEntry.value)
            } else {
                print(N - num2Entry.value - num1MostSeeEntry.value)
            }
            return
        }
    }
}




