Meet·Beginner·Playground·10 min·Updated Sep 30, 2026

Find the meeting room double-booking

Schedule auditingConflict detection

Scenario

Facilities got a complaint that a meeting room was double-booked this morning.

Find which room has overlapping bookings.

EventID	Room	Start	End	Title
EV-1	Aspen	09:00	10:00	Budget Review
EV-2	Birch	09:30	10:30	1:1 Sync
EV-3	Cedar	10:00	11:00	Vendor Call
EV-4	Aspen	10:30	11:30	Design Crit
EV-5	Dogwood	11:00	12:00	Sprint Planning

Preview — first 5 rows of room-bookings.csv

Group the bookings by room.
Within each room, sort by start time and check whether any booking starts before the previous one ends.
Identify the one room with a real overlap, and the exact overlapping window.

Prompt idea:

Here are today's meeting room bookings. Find any room with two overlapping bookings, and tell me the exact time window where they conflict.

Which room has two overlapping bookings?

Need a hint?

Sort bookings by room, then by start time, and look for a start time that falls before the previous booking's end time for that room.

Reveal Solution

The solution files contain the completed challenge. Review the approach to see if you missed any edge cases.

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Updated Sep 30, 2026

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