What is the Meeting Rooms pattern?

The Meeting Rooms is a common coding interview pattern in Intervals problems. It provides a structured approach to solving related algorithm challenges efficiently.

When should I use Meeting Rooms?

Use the Meeting Rooms pattern when you encounter problems matching its characteristics. Check the "When to Use" and "Clues" sections in the lesson for specific indicators.

Is Meeting Rooms asked in FAANG interviews?

Yes, Meeting Rooms is an essential pattern commonly tested in FAANG and top tech company technical interviews.

Intervals

Easy

Meeting Rooms

Determine if a person can attend all meetings.

10 min read

Solve on LeetCode

Problem Understanding

Given an array of meeting time intervals intervals where intervals[i] = [starti, endi], determine if a person can attend all meetings.

Example 1:

Input: [[0,30],[5,10],[15,20]]
Output: false
Why? Meeting [0,30] overlaps with both [5,10] and [15,20].

Example 2:

Input: [[7,10],[2,4]]
Output: true

Algorithm Strategy

We simply need to check if any two intervals overlap. If we sort them by start time, we only need to check adjacent meetings.

Sort: Sort intervals by start time.
Scan: Iterate through the sorted list.
Check: If current.start < previous.end, then there is an overlap. Return false immediately.
Result: If loop finishes without conflict, return true.

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