#include <cstdlib>
#include <cstdio>
#include <cmath>
#include <cstring>
#include <climits>
#include <cctype>
#include <cassert>
#include <iostream>

using namespace std;

int main (void) {
	string S;
	cin >> S;
	long long bestBelow = 0;
	long long bestAbove = 100;
	int n = S.length();
	for (int i = 0; i < n; i++) {
		int d = S[i] - '0';
		long long newBestBelow = min( 
			min( bestBelow + d    , bestBelow + 11 - d ),
			min( bestAbove + d + 1, bestAbove + 10 - d ));
		long long newBestAbove = min(
			min( bestBelow + d + 1, bestBelow + 10 - d ),
			min( bestAbove + d + 2, bestAbove +  9 - d )); 
		bestBelow = newBestBelow;
		bestAbove = newBestAbove;
	}
	cout << min(bestBelow, bestAbove+1) << "\n";
	return 0;
}