#include<iostream>
#include<math.h>
using namespace std;
int main() {
int a,b,i,j=0,oglindit,m;
cout<<"a=";cin>>a;
cout<<"b=";cin>>b;
for(i=a;i<=b;i++)
if(sqrt(i)==int(sqrt(i)))
{ oglindit=0;
m=i;
while(m)
{
oglindit=oglindit*10+m%10;
m=m/10;
}
if(sqrt(oglindit)==(int)(sqrt(oglindit)))
j++;
i=((int)sqrt(i)+1)*((int)sqrt(i+1)+1);i--;}
cout<<j;
return 0;
}
