fun main(args: Array<String>) {
    val n = readLine()!!.toInt()
    val xs = readLine()!!.split(" ").map { it.toInt() }
    val map1: Map<Int, Int> = toCountMap(xs.filterIndexed { index, x -> index % 2 == 0 })
    val map2: Map<Int, Int> = toCountMap(xs.filterIndexed { index, x -> index % 2 == 1 })
    val pairs1 = map1.toList().sortedByDescending { it.second }
    val pairs2 = map2.toList().sortedByDescending { it.second }
    var ans = n
    for (p1 in pairs1) {
        val p2 = pairs2[0]
        if (p1.first != p2.first) {
            ans = Math.min(n - p1.second - p2.second, ans)
        } else {
            ans = Math.min(n - p1.second, ans)
            ans = Math.min(n - p2.second, ans)
        }
    }
    for (p2 in pairs2) {
        val p1 = pairs1[0]
        if (p1.first != p2.first) {
            ans = Math.min(n - p1.second - p2.second, ans)
        } else {
            ans = Math.min(n - p1.second, ans)
            ans = Math.min(n - p2.second, ans)
        }
    }
    println(ans)
}

fun toCountMap(xs: List<Int>): Map<Int, Int> {
    val count = mutableMapOf<Int, Int>()
    for (x in xs) {
        if (!count.containsKey(x)) {
            count[x] = 1
        } else {
            count[x] = count[x]!! + 1
        }
    }
    return count
}