HDU-2097 sky数

#include<iostream>
using namespace std;
int change(int a,int b)
{
	int m=0;
	while(1)
	{
		m+=a%b;
		a/=b;
		if(a==0) 
			break;
	}
	return m;
}
int main()
{
	int n;
	while(cin>>n,n)
	{
		if(change(n,10)==change(n,16) && change(n,10)==change(n,12))
		cout<<n<<" is a Sky Number."<<endl;
		else 
		cout<<n<<" is not a Sky Number."<<endl;
	}
	return 0;
}