package main
import (
	"math"
	"sync"
)

func sum (id int)  {
	var x int64
	for i := 0 ;  i < math.MaxUint32 ; i ++  {
		x += int64(i)
	}
	println(id ,x)
}


func main() {
	wg := new(sync.WaitGroup)
	wg.Add(2)
	for i := 0 ; i < 2 ; i ++ {
		go func(id int) {
			defer wg.Done()
			sum(id)
		}(i)
	}
	wg.Wait()
}