package main

import . "fmt"

func main() {
	var n int
	Scan(&n)
	a:=make([]int,n)
	for i:=range a {
		Scan(&a[i])
	}
	for birds:=0; birds<=n; birds++ {
		turtles := n-birds
		legs := birds*2+turtles*4
		ok := true
		for _, c := range a {
			ok = ok && (legs-2==c||legs-4==c)
		}
		if ok {
			Println(birds, turtles)
		}
	}
}