Boat Parts

ID: boatparts

Difficulty: 1.4

CPU Time: 1 second

Memory: 1024 MB

Solution

Keep a tally of unique parts seen, and a map to track their occurrences, and any time a part is seen for the first time, mark it in the map. If the number of unique parts is ever == P, output the day (by tracking that too) or the number of parts seen total, etc.