![:cry:](./images/smilies/icon_cry.gif)
![:(](./images/smilies/icon_frown.gif)
![:cry:](./images/smilies/icon_cry.gif)
![:(](./images/smilies/icon_frown.gif)
#include<stdio.h>
#include<math.h>
#include<iostream.h>
long primes[10000];
long pc;
long p1,p2;
int isprime(long num)
{
???????????????
}
void genprime(long lim)
{
???????????????????
}
int main()
{
long i,k,n;
genprime(32767);
while(cin>>n)
{
if(isprime(n)) cout<<"no";
else
{
for(i=2;i<=n-1;i++)
{
if((n%i)==0) k++;
}
if(k%2==0) cout<<"yes";
else cout<<"no";
}
cout<<endl;
}
return 0;
}