Problem Overview

Given an array of meeting time intervals consisting of start and end times [[start_1,end_1],[start_2,end_2],...] where start_i < end_i, determine if a person could attend all meetings without any conflicts.

Two meetings overlap if one starts before the other ends. However, meetings that touch at a boundary are NOT considered conflicts. For example, [0,8] and [8,10] do not conflict.

This is a fundamental interval scheduling problem that tests your understanding of sorting and interval comparison logic.

Example 1

` intervals = [[0,30],[5,10],[15,20]]

Output: false

Explanation:

Meeting [0,30] runs from time 0 to 30

Meeting [5,10] starts at 5, which is during [0,30]

Meeting [15,20] starts at 15, which is also during [0,30]

Cannot attend all meetings

`

Example 2

` intervals = [[5,8],[9,15]]

Output: true

Explanation:

First meeting ends at 8

Second meeting starts at 9

No overlap - can attend both

`

Example 3

` intervals = [[0,8],[8,10]]

Output: true

Explanation:

Meetings touch at time 8 but don't overlap

This is explicitly NOT considered a conflict

`

Requirements

• Handle up to 500 meeting intervals

• Meeting times can be as large as 1,000,000

• Empty interval list should return

• Should we modify the input array or work with a copy?

• Are the intervals guaranteed to have start < end?

• Can there be duplicate intervals?