Find the Most Frequently Used Meeting Room

Question

The candidate is asked to write a function that identifies the most frequently used meeting room from a list of meeting records.

Codemia · Accepted Answer

To find the most frequently used meeting room, I will utilize a hash map (or dictionary) to count the occurrences of each room. This allows us to efficiently tally the number of times each room is used as we iterate through the list of meeting records.

1. Initialize an empty hash map to store room counts.
2. Loop through each meeting record, updating the count for each room in the hash map.
3. After counting, iterate through the hash map to find the room with the highest count.
4. Return this room as the result.

The time complexity of this solution is O(n), where n is the number of meeting records, since we are making a single pass to count and another pass to find the maximum. The space complexity is O(m), where m is the number of unique rooms, as we store counts for each room in the hash map.

```python
from collections import defaultdict

def most_frequent_room(meetings):
    room_count = defaultdict(int)
    
    for room in meetings:
        room_count[room] += 1
    
    most_frequent = None
    max_count = 0
    
    for room, count in room_count.items():
        if count > max_count:
            max_count = count
            most_frequent = room
    
    return most_frequent
```

It's important to consider edge cases such as an empty list of meetings, where the function should return None or an appropriate message. Additionally, if there are multiple rooms with the same highest frequency, the implementation should specify which one is returned, such as the first one encountered.

Find the Most Frequently Used Meeting Room

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