Question 1

The Number of Rich Customers — athenahealth Interview Question

Accepted Answer

"The Number of Rich Customers" is a easy difficulty problem asked at athenahealth interviews. It covers the following topics: Database. You can practice it on LeetCode: https://leetcode.com/problems/the-number-of-rich-customers

Question 2

Group Anagrams — athenahealth Interview Question

Accepted Answer

"Group Anagrams" is a medium difficulty problem asked at athenahealth interviews. It covers the following topics: Array, Hash Table, String, Sorting. You can practice it on LeetCode: https://leetcode.com/problems/group-anagrams

Question 3

Best Time to Buy and Sell Stock — athenahealth Interview Question

Accepted Answer

"Best Time to Buy and Sell Stock" is a easy difficulty problem asked at athenahealth interviews. It covers the following topics: Array, Dynamic Programming. You can practice it on LeetCode: https://leetcode.com/problems/best-time-to-buy-and-sell-stock

Question 4

Merge Intervals — athenahealth Interview Question

Accepted Answer

"Merge Intervals" is a medium difficulty problem asked at athenahealth interviews. It covers the following topics: Array, Sorting. You can practice it on LeetCode: https://leetcode.com/problems/merge-intervals

Question 5

Two Sum — athenahealth Interview Question

Accepted Answer

"Two Sum" is a easy difficulty problem asked at athenahealth interviews. It covers the following topics: Array, Hash Table. You can practice it on LeetCode: https://leetcode.com/problems/two-sum

Question 6

Unique Paths II — athenahealth Interview Question

Accepted Answer

"Unique Paths II" is a medium difficulty problem asked at athenahealth interviews. It covers the following topics: Array, Dynamic Programming, Matrix. You can practice it on LeetCode: https://leetcode.com/problems/unique-paths-ii

#	Question Title	Difficulty	Frequency	Topics
1	The Number of Rich Customers	EASY	100.0	Database
2	Group Anagrams	MEDIUM	79.6	ArrayHash TableString+1
3	Best Time to Buy and Sell Stock	EASY	73.2	ArrayDynamic Programming
4	Merge Intervals	MEDIUM	73.2	ArraySorting
5	Two Sum	EASY	64.2	ArrayHash Table
6	Unique Paths II	MEDIUM	64.2	ArrayDynamic ProgrammingMatrix
7	Merge Sorted Array	EASY	64.2	ArrayTwo PointersSorting
8	First Missing Positive	HARD	64.2	ArrayHash Table
9	Longest Substring Without Repeating Characters	MEDIUM	64.2	Hash TableStringSliding Window
10	Longest Palindromic Substring	MEDIUM	64.2	Two PointersStringDynamic Programming

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