Quick Overview

Process a stream of add-one and remove-all operations on a multiset and report, after each operation, how many element triples form an arithmetic progression with a fixed positive difference. It tests efficient incremental updates, correct treatment of duplicate occurrences, and counts that exceed the 32-bit range.

Count Equal-Difference Triples After Each Add or Remove-All Operation

Company: SIG (Susquehanna)

Role: Software Engineer

Category: Coding & Algorithms

Difficulty: medium

Interview Round: Online Assessment

Overview: Process a stream of add-one and remove-all operations on a multiset and report, after each operation, how many element triples form an arithmetic progression with a fixed positive difference. It tests efficient incremental updates, correct treatment of duplicate occurrences, and counts that exceed the 32-bit range.

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