I applied through college or university. The process took 6 weeks.

The first round is coding round of same problem with different level of complexity. After successfully passing 2 problems, we will be selected for hackathon round. In hackathon, there are 2 phases. First phase involves a coding round with the problem named "Tree of Space". After clearing this round, there is a hackathon round part two, which is conducted in Slack (Juspay communication application), which is conducted from morning 11 am to night 9 pm.

Now I'm currently waiting for the results. Then after there will be 3 rounds of interview.

Explain time complexity of the lock and unlock functions.