#3715: 這樣的判斷錯了嗎?


nn_971500 (Pcom)


#include <iostream>
using namespace std;
int main()
{
long long double a,b,c;
while(cin>>a)
{
if(a!=0)
{
c=(a/3)*3-a;
if(c==0)
cout<<"yes"<<endl;
else
cout<<"no"<<endl;
}
else
cout<<"no"<<endl;
}
}