Level 5Exercise #125

Mini OA: meeting rooms

Given meeting intervals, return the minimum rooms required.

What you’ll practice

This Level 5 exercise focuses on heap scheduling in the Algorithms curriculum. Solve the challenge prompt above using clear, idiomatic Python and the relevant language or standard-library tools.

Relevant Python reference: heapq — Heap queue algorithm.

Sample Test Cases

Example #1

Input:min_rooms([(0,30),(5,10),(15,20)])

Output:2

Reference Solution

Reveal Reference Solution

def min_rooms(intervals: list[tuple[int,int]]) -> int:
    import heapq
    rooms = []
    for start, end in sorted(intervals):
        if rooms and rooms[0] <= start:
            heapq.heapreplace(rooms, end)
        else:
            heapq.heappush(rooms, end)
    return len(rooms)

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Mini OA: meeting rooms

What you’ll practice

Sample Test Cases

Further Reading

Reference Solution