siruri pb6

#include<iostream>
#include<cstring>
using namespace std;
char a[100];
int main()
{
    int n,i,s;
    s=0;
    cin.getline(a,100)
    cin>>a;
    cin>>n;
    n=strlen(a)-1;
    for(i=0;i<=n;i--)
    {
        if(a[i]>='0'&&a[i]<='9')
        {
            s=s+a[i];
        }
    }
    cout<<s;
}