Meeting Rooms

Asked byAmazonGoogle

Problem

Given an array of meeting time intervals, determine whether a single person can attend every meeting — that is, whether any two intervals overlap.

Examples

Example 1

Input:intervals = [[0,30],[5,10],[15,20]]

Output:false

Example 2

Input:intervals = [[7,10],[2,4]]

Output:true

Constraints

0 <= intervals.length <= 10^4

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How to approach it: the Intervals pattern

Problems about ranges — meeting times, event schedules, ranges on a number line — almost always start with sorting the intervals by start (or end) time, then sweeping through them once.

Look for this pattern when

The problem talks about meetings, bookings, ranges, or scheduling.
You need to merge overlapping ranges, find gaps, or count how many overlap at once.

Read the full Intervals guide →

Video walkthroughs

Original problem on LeetCode ↗