import kotlinx.coroutines.*
import java.util.concurrent.TimeUnit.SECONDS

/** Returns number of prime divisors of [n] */
fun numberOfPrimeDivisors(n: Int): Int {
    var i = 2
    var currentN = n
    var primeDivisors = 0
    while (i * i <= currentN) {
        if (currentN % i == 0) {
            ++primeDivisors
        }
        while (currentN % i == 0) {
            currentN /= i
        }
        ++i
    }
    if (currentN != 1) {
        ++primeDivisors
    }
    return primeDivisors
}

/**
 * Sleeps for [n] seconds, after that gets char of the day, calling [charOfTheDay].
 * If char of the day is not 'a', returns it, otherwise repeats
 */
suspend fun getSpecificCharOfTheDay(n: Int, charOfTheDay: () -> Char): Char {
    while (true) {
        delay(SECONDS.toMillis(n.toLong()))
        val currentCharOfTheDay = charOfTheDay()
        if (currentCharOfTheDay != 'a') {
            return currentCharOfTheDay
        }
    }
}

fun f(n: Int, charOfTheDay: () -> Char, callback: (Int, Char) -> Unit) {
    GlobalScope.launch {
        val currentCharOfTheDay = async { getSpecificCharOfTheDay(n, charOfTheDay) }
        val primeDivisors = numberOfPrimeDivisors(n)
        callback(primeDivisors, currentCharOfTheDay.await())
    }
}