func main()
	var n: int :: cui@inputInt()
	var ans: int :: 0
	var day: int :: 0
	while loop(true)
		do day :+ 1
		if(day % 7 = 0)
			do n :+ 6
		end if
		do n :- 1
		if(n = 0)
			do cui@print("\{day}\n")
			break loop
		end if
	end while
end func