#include <bits/stdc++.h>
using namespace std;

#define rep(i,n) for(long long i = 0; i < (long long)(n); i++)
using ll = long long;
template<class T1, class T2> bool chmin(T1 &a, T2 b) { return b < a && (a = b, true); }
static const long long INF = 4e18;

ll pay[] = {0, 1, 2, 3, 2, 1, 2, 3, 3, 2, 1};
int main(void) {
    string s; cin >> s;
    ll n = s.length(); 
    if (n != 10001) {
        assert(1<=n&&n<=10000);
    } else {
        assert(n=10001);
        assert(s[0] == 1);
        rep(i, n-1)
            assert(s[i+1] == 0);
    }
    rep(i, n) assert('0'<=s[i]&&s[i]<='9'), s[i] -= '0';

    ll a = pay[s[0]], b = pay[s[0]+1];
    rep(i, s.length()-1) {
        ll a_next = INF, b_next = INF;
        chmin(a_next, min(a + pay[s[i+1]+0], b + pay[10-s[i+1]]));
        chmin(b_next, min(a + pay[s[i+1]+1], b + pay[9-s[i+1]]));
        swap(a_next, a), swap(b_next, b);
    }
    cout << a << endl;
    return 0;
}