###### tags: `CPE-數學計算`
# *Square Numbers*
## 題目：

#include <iostream>
#include <vector>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <algorithm>
using namespace std;

int main(void)
{
   int a,b;
   while(cin>>a>>b){
       int count =0;
       int temp;
       if (a==0&&b==0){
           break;
       }
       
       for (int i=a;i<=b;i++){
           temp = (int)sqrt(i);
           if (temp*temp==i){
               count++;
           }
       }
       cout<<count<<endl;
   }
   return 0;
}