package main

import "fmt"

func main() {
	var n int
	fmt.Scan(&n)
	weeks := n / 7
	rem := n % 7
	minOff := weeks * 2
	if rem == 6 {
		minOff++
	}
	maxOff := weeks * 2
	if rem >= 2 {
		maxOff += 2
	} else {
		maxOff += rem
	}
	fmt.Println(minOff, maxOff)
}