[Solved] Consider the following code snippet implementing the sweep line approach for... Given the input schedule = [[[1,2],[5,6]], [[1,3]], [[4,10]]], what is the final returned list of free time intervals? | Intervals

Intervals - Employee Free Time

Consider the following code snippet implementing the sweep line approach for Employee Free Time. Given the input schedule = [[[1,2],[5,6]], [[1,3]], [[4,10]]], what is the final returned list of free time intervals?

A[[3,4],[6,10]]

B[[3,4]]

C[[3,4],[6,7]]

D[[3,4],[6,10]]

Step-by-Step Solution

Step 1: Sort events and track active intervals
Events: (1,1),(1,1),(2,-1),(3,-1),(4,1),(5,1),(6,-1),(10,-1). Active counts track busy employees.
Step 2: Identify free intervals when active==0 between events
Free time occurs between 3 and 4 only, as after 4 active increments again until 10.
Final Answer:
Option B -> Option B
Quick Check:
Only [3,4] is free time interval [OK]

Quick Trick: Free time only when no active intervals between events [OK]

Common Mistakes:

MISTAKES

Including intervals after 6 incorrectly as free time

Trap Explanation:

PITFALL

Misreading event order or active count leads to wrong free intervals.

Interviewer Note:

CONTEXT

Tests ability to mentally execute sweep line code and track active intervals.

Master "Employee Free Time" in Intervals

3 interactive learning modes - each teaches the same concept differently

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More Intervals Quizzes

Given the input schedule = [[[1,2],[5,6]], [[1,3]], [[4,10]]], what is the final returned list of free time intervals?

Step 1: Sort events and track active intervals

Step 2: Identify free intervals when active==0 between events

Final Answer:

Quick Check:

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