[victorhn]

Yes, there are people that good at algorithms, you just need to enter a contest at leetcode/codeforces/topcoder where you can just amaze yourself how some people can solve these difficult problems in such a little amount of time.

On the other hand, for FB and Google you just need to be decent enough at these questions not really a superstar. I would say if you can solve most medium problems in leetcode and occasionally a hard then you are good enough.

Worst case you just get rejected and life follows its normal course.

BTW, i have been rejected like 30 times from these companies, it does suck when they tell you, because you start doubting yourself, but then after a few days the feeling goes away.