//////#include<stdio.h>
//////int main() {
////// int a;
////// int b;
////// int c;
////// for(a=1; a<=9; a++) {
////// for(b=0; b<=9; b++) {
////// for(c=1; c<=9; c++) {
////// if(20*a+2*b==100*c+11*b) {
////// printf("%d%d+%d%d=%d%d%d\n", a, b, a, b, c, b, b);
////// }
////// }
////// }
////// }
//////}
////
////
//////#include<stdio.h>
//////int main() {
////// int a;
////// int b;
////// int c;
////// for(a=1; a<=9; a++) {
////// for(b=0; b<=9; b++) {
////// for(c=1; c<=9; c++) {
////// if(90*a+10*b-b==10*c) {
////// printf("%d%d%d-%d%d=%d%d\n", a, b, c, a, b, c, c);
////// }
////// }
////// }
////// }
//////}
////
////
//////#include<stdio.h>
//////int main()
//////{
////// int a, b, c, d;
////// int w, x, y, z;
////// int i, j;
////// char l[7];
////// scanf("%d %d %d %d", &a, &b, &c, &d);
////// scanf("%d %d %d %d", &w, &x, &y, &z);
////// for(i=a;i<c;i++)
////// {
////// for(j=b;j<=d;j++)
////// {
////// for(i=w;i<=y;i++)
////// {
////// for(j=x;j<=z;j++)
////// {
////// if(i==j)
////// {
////// strcpy(l,"POINT");
////// }
////// if(i==i||j==j)
////// {
////// strcpy(l,"LINE");
////// }
////// }
////// }
////// }
////// }
////// printf("%s",l);
//////}
////
////
////#include<stdio.h>
////int main() {
//// int n;
//// int k;
//// int i;
//// int j;
//// int sum = 0;
//// int max = -1000;
//// int arr[100001];
//// scanf("%d %d", &n, &k);
//// for(i=1; i<=n; i++) {
//// scanf("%d", &arr[i]);
//// }
//// for(j=1; j<=k; j++) {
//// sum+=arr[j];
//// }
//// max=sum;
//// for(i=1; i<=n-k; i++) {
//// sum=sum-arr[i]+arr[i+k];
//// //printf("%d ",sum);
//// if(sum>max) {
//// max = sum;
//// }
//// }
//// printf("%d", max);
////}
////
////
////10 5
////3 -2 -4 -9 0 3 7 13 8 -3
////*/
////
////
////#include<stdio.h>
////int main()
////{
//// int n;
//// int a;
//// int i, j;
//// int x, y;
//// int sum = 0;
//// int arr[101][101]={};
//// scanf("%d", &n);
//// for(a=1;a<=n;a++)
//// {
//// scanf("%d %d", &x, &y);
//// for(i=x;i<x+10;i++)
//// {
//// for(j=y;j<y+10;j++)
////
//// arr[i][j]=1;
//// }
//// }
//// }
////
//// for(i=1;i<=100;i++)
//// {
//// for(j=1;j<=100;j++)
//// {
//// if(arr[i][j]==1)
//// {
//// sum++;
//// }
//// }
//// }
//// printf("%d", sum);
////}
//
//
//#include<stdio.h>
//int main()
//{
// int n;
// int i;
// int a;
// int sum = 0;
// scanf("%d", &n);
// a=n;
// while(n!=0)
// {
// sum = sum + n%10;
// n=n/10;
// }
// if(a%sum==0)
// {
// printf("Yes");
// }
// else
// {
// printf("No");
// }
//}
#include<stdio.h>
int main()
{
int m, n;
int i, j;
int sum = 0;
int a;
scanf("%d %d", &m ,&n);
for(i=m;i<=n;i++)
{
for(j=1;j<=100;i++)
{
if(i==j*j)
{
sum = sum + i;
}
}
}
for(i=1;i<=100;i++)
{
if(m<=i*i&&i*i<=n)
{
a++;
if(a<1)
{
printf("-1");
}
else
{
printf("%d", sum);
}
}
}
}