testing - dair

import kotlin.math.ceil

fun friendly(a: Int, b: Int) : Boolean {
    val evenA: MutableList<Int> = mutableListOf()
    val evenB: MutableList<Int> = mutableListOf()

    for (n in 1..a) {
        if (a % n == 0 && n != a) {
            evenA.add(n)
        }
    }
    for (n in 1..b) {
        if (b % n == 0 && n != b) {
            evenB.add(n)
        }
    }

    return evenA.sum() == b && evenB.sum() == a
}

fun prices(values: List<Float>) {
    val minimumPrice = values.min()
    val maximimPrice = values.max()
    val dayToBuy = values.indexOf(minimumPrice)
    val dayToSell = values.indexOf(maximimPrice)
    println("day to buy $dayToBuy")
    println("day to sell $dayToSell")
}

fun replace(value: String) {
    val grouped = value.groupingBy { it }
            .eachCount()
            .filter {
                it.value > 1
            }

    var finalString = value
    grouped.entries.forEach {
        val exp = it.key.toString().repeat(it.value)
        finalString = finalString.replace(exp.toRegex(), "${it.value}${it.key}")
    }

    println(finalString)
}

fun main(args: Array<String>) {
    println(friendly(220, 285))
    prices(listOf(1f, 2f, 1f, 5f, 2.1f, 6f, 3f))
    replace("ABBBBCFLL")
}