Meeting Rooms II (Recent Phone Screen)

Had this pop up in a backend phone screen recently. Thought it was going to be a straightforward LeetCode 253.

The Prompt:
Given an array of meeting time intervals [[start, end], ...], find the minimum number of conference rooms required.

My Approach:

• S
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  Takeaway:
  Don't just memorize the min-heap solution. Be ready to explain why sorting by start times and tracking the earliest ending meeting works intuitively.

Was this backend phone screen in a shared runnable editor, and did you have to code the min-heap follow-up live or just explain it verbally?

楼主这个 takeaway 很实在，253 背个 heap 写法确实不难，难的是被追问 why 的时候能把直觉讲顺。好奇电面里有没有加 twist 啊，比如带权重的变体或者 follow-up？WaitList 还有戏，蹲一个后续！

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