> #include<stdio.h>
> #include<math.h>
> int main()
> {
> 	int s1,s2;
> 	while(scanf("%d%d",&s1,&s2)==2){
> 	s1=abs(s1-s2);
> 	printf("%d\n",(s1+1)%2);}
> }
> 
> //个人感觉这样没错啊，谁能给帮忙找个反例？