#include <stdio.h>

	int square(int x){
 	return x*x;
 }
 
	int negate(int x,int y){
	return x-y;
 }
		
	int abs(int x){
	return (x>0)?x:-x;
}


 int main(void){
 int x,y;
 scanf("%d %d",&x,&y);
 printf("%d",abs(negate(square(x),square(y))));
 return 0;
 }