\begin{array}{c} \color{#db1616}{\texttt{#Khoadang09}} \end{array}
`@`$\texttt{C++: }$

#include <bits/stdc++.h>
#define int long long
#define buff ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define name ""
#define ip freopen(name".INP","r",stdin);
#define op freopen(name".OUT","w",stdout)
using namespace std;
signed main(){
    map<int,int> save = {{0,1},{1,0},{2,0},{3,0},{4,1},{5,0},{6,1},{7,0},{8,2},{9,1}};
    buff;
    int n; cin >> n;
    int res = 0;
    while (n>0){
        res += save[n%10];
        n /= 10;
    }
    cout << res;
    return 0;
}

#include <iostream>
using namespace std;
int a[10] = {1,0,0,0,1,0,1,0,2,1};
int main()
{
    int n;
    cin >> n;
    int cnt = 0;
    while (n > 0) {
        int x = n % 10;
        cnt += a[x];
        n /= 10;
    }
    cout << cnt;
}