C++-POJ1067-取石子游戏

//(ak,bk)=([k*(1+sqrt(5))/2],[k*(1+sqrt(5))/2]+k)=(ak,ak+k)

 #include <cstdio>
 double sqrt5=2.2360679774997896964091736687313;
 int main(){
     for(int a,b;scanf("%d%d",&a,&b)!=EOF;puts((((int)((b-a)*(+sqrt5)/)))==a?"":""))
         a>b?a^=b,b^=a,a^=b:;
     return ;
 }