Algorithms - Sherlock and Squares

#include<iostream>
#include<cmath>

using namespace std;

int main()
{
long long i,j,d;
float sq;
int sum,t,m;
while(cin>>t)
{
for(m=0; m<t; m++)
{
cin>>i;
cin>>j;

if(i==0 && j==0) break;
sum=0;

if(i<j){
for(d=i; d<=j; d++)
{
sq=sqrt(d);
if((float)sq - (int)sq==0){
sum+=1;}

}
cout<<sum<<endl;
}
else {
for(d=j; d<=i; d++)
{
sq=sqrt(d);
if(((float)sq-(int)sq)==0) {
sum+=1;}

}
cout<<sum<<endl;

}
}
}
return 0;
}