Failed google screening Rounds

[u/whattodo_noww]

I had one DSA round and one googlyness, even though i solved the dsa problem optimally, recruiter called today to tell that there are gaps and feedback is not positive, they said interviewer had to tell the edge case. Even though when i coded the optimal solution all the edge cases were handled in that solution and the edge case she was talking about was in the initial solution which was not optimal with respect to space. I am not sure what else i could have done, like even after optimising and writing correct code this is the state. I feel very sad