#include <stdio.h>
int main(void){
	double A, B;
	scanf("%lf%lf",&A, &B);
	
	double ans = 0;
	if(A > B){
		if((A * A) - (B * B) == 0){
			ans = (A * A) + (B * B);
		}else{
			ans = (A * A) - (B * B);
		}
	}else{
		if((B * B) - (A * A) == 0){
			ans = (B * B) + (A * A);
		}else{
			ans = (B * B) - (A * A);
			
		}
	}
	for(double i = 1;i <= ans;i ++){
		if(i * i == ans){
			printf("%lf",i);
			return 0;
		}
	}
	printf("%lf",ans);
}