#include<stdio.h>
#include<string.h>


int main(){
int a,b;
scanf("%d%d",&a,&b);
if(a<b){
	printf("%d\n",b-a);
	
}else if(a>b){
	
	printf("-%d\n",a-b);
	
}else if(a==b){
	
	printf("0\n");
}
	return 0;
}