Available question text
Given a sequence of ID updates where each step adds or removes a given number of copies of an ID, maintain the dynamic multiset of ID counts and return the current maximum count (or 0 if empty) after each step. The challenge is to efficiently track per-ID frequencies and support fast queries for the highest frequency across up to 1e5 updates.
Related questions
Continue with questions that share topics or the same question type.
- Design Movie Rental System
Coding · Array · Design · Hash Table
- Top K Frequent Elements
Coding · Array · Bucket Sort · Counting
- Top K Frequent Words
Coding · Array · Bucket Sort · Counting
- Avoid Flood in The City
Coding · Array · Binary Search · Greedy
Sources · 2 references
These records explain where the question appears. A company tag or candidate report does not guarantee a future interview question.
Hello Interview · 1 record
No company association
Leetcode 3092. Most Frequent IDs
Reported date not specified · 0 source reports
Source snapshot: Nov 12, 2026
View source
LeetCode company tags · 1 record
Snowflake
Most Frequent IDs
Reported date not specified · Source window: 6mo
Source snapshot: Oct 20, 2026
Source frequency score: 62.9. This is not an interview probability.
View source