package main

import (
	"bufio"
	"fmt"
	"io"
	"math"
	"os"
	"strconv"
)

var iost *Iost

type Iost struct {
	Scanner *bufio.Scanner
	Writer  *bufio.Writer
}

func NewIost(fp io.Reader, wfp io.Writer) *Iost {
	const BufSize = 2000005
	scanner := bufio.NewScanner(fp)
	scanner.Split(bufio.ScanWords)
	scanner.Buffer(make([]byte, BufSize), BufSize)
	return &Iost{Scanner: scanner, Writer: bufio.NewWriter(wfp)}
}
func (i *Iost) Text() string {
	if !i.Scanner.Scan() {
		panic("scan failed")
	}
	return i.Scanner.Text()
}
func (i *Iost) Atoi(s string) int                 { x, _ := strconv.Atoi(s); return x }
func (i *Iost) GetNextInt() int                   { return i.Atoi(i.Text()) }
func (i *Iost) Atoi64(s string) int64             { x, _ := strconv.ParseInt(s, 10, 64); return x }
func (i *Iost) GetNextInt64() int64               { return i.Atoi64(i.Text()) }
func (i *Iost) Atof64(s string) float64           { x, _ := strconv.ParseFloat(s, 64); return x }
func (i *Iost) GetNextFloat64() float64           { return i.Atof64(i.Text()) }
func (i *Iost) Print(x ...interface{})            { fmt.Fprint(i.Writer, x...) }
func (i *Iost) Printf(s string, x ...interface{}) { fmt.Fprintf(i.Writer, s, x...) }
func (i *Iost) Println(x ...interface{})          { fmt.Fprintln(i.Writer, x...) }
func isLocal() bool                               { return os.Getenv("NICKEL") == "BACK" }
func main() {
	fp := os.Stdin
	wfp := os.Stdout
	if isLocal() {
		fp, _ = os.Open(os.Getenv("WELL_EVERYBODY_LIES_TOO_MUCH"))
	}
	iost = NewIost(fp, wfp)
	defer func() {
		iost.Writer.Flush()
	}()
	solve()
}
func solve() {
	s := iost.Text()
	n := len(s)
	ss := make([]int, n+1)
	for i := 0; i < n; i++ {
		ss[i+1] = int(s[i] - '0')
	}
	const Inf = math.MaxInt64
	dp := [2]int{0, Inf}
	for i := n; i >= 0; i-- {
		dp2 := [2]int{Inf, Inf}
		for j := 0; j < 2; j++ {
			if dp[j] == Inf {
				continue
			}
			for k := 0; k < 10; k++ {
				tj := 0
				b := 0
				if ss[i]+j > k {
					tj = 1
					b = 10
				}
				x := (k - (ss[i] + j) + b)
				sum := k/5 + k%5 + x/5 + x%5
				dp2[tj] = min(dp2[tj], dp[j]+sum)
			}
		}
		dp, dp2 = dp2, dp
	}
	iost.Println(min(dp[0], dp[1]))
}
func max(a, b int) int {
	if a < b {
		return b
	}
	return a
}
func min(a, b int) int { return -max(-a, -b) }
func abs(a int) int    { return max(a, -a) }