How to Solve Frequency Tracker Problem
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Frequency Tracker
Design a data structure that keeps track of the values in it and answers some queries regarding their frequencies. Implement the FrequencyTracker class. FrequencyTracker(): Initializes the FrequencyTr...
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Understanding the Frequency Tracker Problem
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Problem Statement
Design a data structure that keeps track of the values in it and answers some queries regarding their frequencies. Implement the FrequencyTracker class. FrequencyTracker(): Initializes the FrequencyTracker object with an empty array initially. void add(int number): Adds number to the data structure. void deleteOne(int number): Deletes one occurrence of number from the data structure. The data structure may not contain number, and in this case nothing is deleted. bool hasFrequency(int frequency): Returns true if there is a number in the data structure that occurs frequency number of times, otherwise, it returns false.
Frequency Tracker
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Example inputExample outputConstraints
1 <= number <= 1051 <= frequency <= 105At most, 2 * 105 calls will be made to add, deleteOne, and hasFrequency in tHow Interview Coder Helps with Leetcode Problems
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