Uber SDE-intern interview questions

A coding Round is firstly done for shortlisting the students then 3 rounds of interviews in which all three are basically technical rounds. The coding question was moderate level and the interviewer help you if you ask for hint.

It was offline interview where interviewer asked a question to solve and code it correctly. It was hard problem of leet code , the question was difficult for me. i tell him brute force approach but it was of very high time complexity