I was referred by one of my friends only to feel dissappointed. After the referral, the recruiter contacted me the very next day and we had a great chat. After that, my phone screen interview was scheduled where we spent about 40 minutes coding the solution. I gave the optimal solution but did make one silly mistake which had to be pointed out by the interviewer but I fixed it right away after it was pointed out. Otherwise, my code was very readable and I took care of all the edge cases. The next day I received the rejection email.