func main()
	var a: int :: cui@inputInt()
	var b: int :: cui@inputInt()
	var c: int :: cui@inputInt()
	var d: int :: cui@inputInt()
	var e: int :: cui@inputInt()
	var lcm: int :: math@lcm(a + b, c + d)
	var ans: int :: 0
	for i(0, lcm - 1)
		do ans :+ f(i, a, a + b, c, c + d)
	end for
	do ans :* e / lcm
	for i(0, e % lcm - 1)
		do ans :+ f(i, a, a + b, c, c + d)
	end for
	do cui@print("\{ans}\n")
	
	func f(i: int, a: int, ab: int, c: int, cd: int): int
		if(i % ab >= a)
			ret 0
		end if
		if(i % cd >= c)
			ret 0
		end if
		ret 1
	end func
end func