using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static char[][] SList(long n) => Enumerable.Repeat(0, (int)n).Select(_ => ReadLine().ToCharArray()).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = ReadLine();
        var list = new int[n.Length * 2];
        for (var i = 0; i < n.Length; ++i)
        {
            list[i * 2] = (n[i] - '0') / 5;
            list[i * 2 + 1] = (n[i] - '0') % 5;
        }
        var dp0 = 0;
        var dp1 = 0;
        var INF = int.MaxValue / 2;
        if (list[0] == 0) dp1 = INF;
        else
        {
            dp0 = 1;
            dp1 = 2;
        }
        for (var i = 1; i < list.Length; ++i)
        {
            var ndp0 = 0;
            var ndp1 = 0;
            if (i % 2 == 0)
            {
                ndp0 = Math.Min(dp0, dp1) + list[i];
                ndp1 = Math.Min(dp0, dp1 - 2) + 3 - list[i];
            }
            else
            {
                ndp0 = Math.Min(dp0, dp1) + list[i];
                ndp1 = Math.Min(dp0, dp1 - 2) + 6 - list[i];
            }
            dp0 = ndp0;
            dp1 = ndp1;
        }
        WriteLine(Math.Min(dp0, dp1));
    }
}