package main

import (
  "fmt"
  "time"
  "sync"
)

func timedPrint(number int64, group *sync.WaitGroup) {
  time.Sleep(time.Duration(number) * time.Millisecond)
  fmt.Println(number)
  group.Done()
}

func timeSort(numbers []int64, group *sync.WaitGroup) {
  for _, number := range numbers {
    group.Add(1)
    go timedPrint(number, group)
  }
}


func main() {
  unsorted := []int64{10, 4, 20, 13, 41}
  var group sync.WaitGroup
  timeSort(unsorted, &group)
  group.Wait()
}