#include <iostream>
using namespace std;
int main()
{
int n;cin>>n;
int r,d;
int t=n;
while(n>0)
{
r=n%10;
d=d+r;
n=n/10;
}
int k=t/d;
if(k%2==0) cout<<"yes";
else cout<<"no";
}
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