#define _USE_MATH_DEFINES
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<string>
#include<iostream>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<queue>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include <sstream>
#include<iomanip>
#include <ctype.h>
using namespace std;

//#include<bits/stdc++.h>


int main() {
	int r[15] = {1,0,0,0,1,0,1,0,2,1};
	int n, ans = 0;
	cin >> n;
	int a = 0;
	while (n) {
		a += r[n % 10];
		n /= 10;
		ans++;
	}

	cout << min(2 * (a + 1) + ans, 2 * ans + a + 1)<<endl;
	return 0;
}