HDOJ 2097

 #include<stdio.h>
 int func(int n,int k)
 {
     int a,b=;
     a=n;
     while(a!=)
     {
         b+=a%k;
         a=a/k;
     }
     return b;
 }
 int main()
 {
     int a,b,n;
     while(scanf("%d",&n)!=EOF&&n)
     {
         int x1,x2,x3,x4;
         x1=func(n,);
         x2=func(n,);
         x3=func(n,);
         if(x1==x2&&x2==x3)
             printf("%d is a Sky Number.\n",n);
         else
             printf("%d is not a Sky Number.\n",n);

     }
     return ;
 }