package main

import (
	"bufio"
	"fmt"
	"os"
)

func abs(x int64) int64 {
	if x < 0 {
		return -x
	}
	return x
}

func min(a, b int64) int64 {
	if a < b {
		return a
	}
	return b
}

func floorCost(x, y int64) int64 {
	d := abs(x - y)
	if d == 0 {
		return 0
	}
	return min(5*d, 10+d)
}

func getPos(apartment, perEntrance, k int64) (int64, int64) {
	apartment--
	entrance := apartment/perEntrance + 1
	floor := (apartment%perEntrance)/k + 1
	return entrance, floor
}

func main() {
	in := bufio.NewReader(os.Stdin)
	out := bufio.NewWriter(os.Stdout)
	defer out.Flush()

	var n, m, k int64
	var a, b int64
	fmt.Fscan(in, &n, &m, &k)
	fmt.Fscan(in, &a, &b)

	perEntrance := m * k
	ea, fa := getPos(a, perEntrance, k)
	eb, fb := getPos(b, perEntrance, k)

	var ans int64
	if ea == eb {
		ans = floorCost(fa, fb)
	} else {
		d := abs(ea - eb)
		d = min(d, n-d)
		ans = floorCost(fa, 1) + 15*d + floorCost(1, fb)
	}

	fmt.Fprintln(out, ans)
}