Problems
125
include <iostream>
include <cmath>
using namespace std;
int main()
{
long long n;
long long hasil=1;
long long say=0;
cin>>n;
while(n!=0){
long long son=n%10;
n=n/10;
if(son%2!=0){
hasil=hasil*son;
say++;
}
}
if(say!=0){
cout<<hasil;
}
else{
cout<<"-1";
}
return 0;
}