#include <bits/stdc++.h>

using namespace std;

using ll = long long;

const int INF = 1000000000;

int dp[2][2];

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    string n;
    cin >> n;
    dp[0][0] = 0;
    dp[0][1] = INF;
    dp[1][0] = INF;
    dp[1][1] = INF;
    int m = n.length();
    for (int i = 0; i < m; i++) {
        int cur = n[i] - '0';
        switch (cur) {
            case 0:
            case 1:
            case 2:
                dp[(i + 1) % 2][0] = min(dp[i % 2][0], dp[i % 2][1] + 1) + cur;
                break;
            case 3:
                dp[(i + 1) % 2][0] = min(dp[i % 2][0], dp[i % 2][1] + 1) + cur;
                dp[(i + 1) % 2][1] = min(dp[i % 2][0], dp[i % 2][1]) + cur - 1;
                break;
            case 4:
                dp[(i + 1) % 2][1] = min(dp[i % 2][0], dp[i % 2][1]) + 1;
                break;
            case 5:
            case 6:
                dp[(i + 1) % 2][0] = min(dp[i % 2][0], dp[i % 2][1]) + cur - 4;
                break;
            case 7:
                dp[(i + 1) % 2][0] = min(dp[i % 2][0], dp[i % 2][1]) + 3;
                dp[(i + 1) % 2][1] = min(dp[i % 2][0] + 1, dp[i % 2][1]) + 2;
                break;
            case 8:
                dp[(i + 1) % 2][1] = min(dp[i % 2][0] + 1, dp[i % 2][1]) + 1;
                break;
            case 9:
                dp[(i + 1) % 2][1] = min(dp[i % 2][0] + 1, dp[i % 2][1]);
                break;
        }
        dp[i % 2][0] = INF;
        dp[i % 2][1] = INF;
    }
    cout << min(dp[m % 2][0], dp[m % 2][1] + 1) << endl;
    return 0;
}