+++prod_k

 prod_k#include <iostream>

using namespace std;

int main()
{
    int n, k, c, P=1;
    bool ok=0;
    cin>>n>>k;
    while(n)
    {
        c=n%10;
        if(c!=k)
        {
            ok=1;
            P=P*c;
        }
        n=n/10;
    }
    if(ok==0)
        cout<<"0";
    else
        cout<<P;
}