How should I practice 15-Minute Chat Session Tracker?

Start by reading the full statement, solve the visible examples, then compare the pattern against related OpenAI onsite interview problems in FastPrep.

Is 15-Minute Chat Session Tracker associated with OpenAI?

FastPrep tags this as a OpenAI onsite interview coding practice problem when the problem catalog has that company and stage context.

Problem · Hash Table

15-Minute Chat Session Tracker

● Hard

OpenAIFULLTIMEONSITE INTERVIEW

Problem statement

Implement trackChatSessions. Process the operations in input order. Each operation is one of:

The problem statement continues

Pro

Examples

Example 1

operations = ["INTERACT u1 7 1","INTERACT u1 7 5","COUNT u1 7","ACTIVE u1","END u1 7 6","ACTIVE u1","INTERACT u1 8 20","COUNT u1 7","ACTIVE u1"]return = ["2","1","0","0","1"]

The first two interactions are counted while T=5. The end event deactivates chat 7. Advancing to minute 20 expires every event before minute 6, so chat 7 has count zero and only chat 8 is active.

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