uva 11461 Square Numbers

#include<iostream>#include<math.h>using namespace std;int main(){   int num1,num2;   while(cin>>num1>>num2&&(num1+num2))   {     int count=0,i,num;     for(i=num1;i<=num2;i++)     {       num=sqrt((double)i);       if(num*num==i)       count++;     }     cout<<count<<endl;   }   return 0;}