#include <stdio.h>
#include <math.h>

int f(double R) {
    double v = sqrt(R);
    int cnt=0;
    double y;
    for (double x=0;x<v/2;x++){
        y=sqrt(R-pow(x,2));
        if ((ceil(x)==floor(x))&&(ceil(y)==floor(y))){
            if((x==0)||(y==0)) cnt+=4;
            else if (x==y) cnt+=4;
            else cnt+=8;
        }
    }
    return cnt;
}

int main() {
    double a,b;
    scanf("%lf %lf", &a, &b);
    double max=0,maxf=0;
    for (double i=a;i<=b;i++){
        max=(f(i)>maxf)?i:max;
    }
    printf("%d\n",(int)max);
}