import java.io.*;
import java.util.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        char[] inputs = sc.next().toCharArray();
        int[] dp1 = new int[inputs.length * 2 + 2];
        int[] dp2 = new int[inputs.length * 2 + 2];
        dp2[0] = 2;
        for (int i = 0; i < inputs.length; i++) {
            int x = inputs[inputs.length - i - 1] - '0';
            int one = x % 5;
            int five = x / 5;
            dp1[i * 2 + 1] = Math.min(dp1[i * 2] + one, dp2[i * 2] + one + 1);
            dp2[i * 2 + 1] = Math.min(dp1[i * 2] + 5 - one, dp2[i * 2] + 5 - one - 1);
            dp1[i * 2 + 2] = Math.min(dp1[i * 2 + 1] + five, dp2[i * 2 + 1] + five + 1);
            dp2[i * 2 + 2] = Math.min(dp1[i * 2 + 1] + 2 - five, dp2[i * 2 + 1] + 2 - five - 1);
        }
        int ans = Math.min(dp1[inputs.length * 2], dp2[inputs.length * 2] + 1);
        System.out.println(ans);
    }
}
class Utilities {
    static String arrayToLineString(Object[] arr) {
        return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));
    }
    
    static String arrayToLineString(int[] arr) {
        return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public int[] nextIntArray() throws Exception {
        return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
    
}