#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <cmath>
using namespace std;

int main() {
    string s;
    cin >> s;

    int n = s.size();

    reverse(s.begin(), s.end());
    s.push_back('0');

    int r = 0;
    for (int i = 0; i < n; i++) {
        int a = s[i] - '0';
        int b = s[i + 1] - '0';
        int a0 = a % 5, a1 = a / 5;
        int b0 = b % 5, b1 = b / 5;
        int c0 = 0, c1 = 0;
        if (a0 <= 3 - (a1 > 0)) {
            r += a0;
        } else {
            c0 = 1;
            r += 5 - a0;
        }
        a1 += c0;
        if (a1 <= 1 - (b0 > 2)) {
            r += a1;
        } else {
            c1 = 1;
            r += 2 - a1;
        }
        s[i + 1] += c1;
    }
    if (s[n] -= '0') {
        r += s[n];
    }

    cout << r << endl;

    return 0;
}