They first invited me to their onsite campus interviews. I was told the interview would last for 1 hour and would involve solving ds and algo question. Initially he asked me about what I have done in past and I also asked some question to him. I was provided with a problem for which I gave an answer and code within 25 mins. I asked the interviewer if he wants me to optimize the problem. But he said its okay, I would just like the code. I was told after a week that I was rejected. He looked very disinterested during the interview and did not provide any hint whether I am in right or wrong direction and does he need more.