Yelp LeetCode Questions

27 questions all-time · 7 easy · 15 medium · 5 hard

#	Problem	Difficulty	Frequency	Acceptance
1	Destination City Array, Hash Table, String	Easy	100	0.8%
2	Filter Restaurants by Vegan-Friendly, Price and Distance Array, Sorting	Medium	98	0.6%
3	Two Sum Array, Hash Table	Easy	95	0.6%
4	Longest Substring Without Repeating Characters Hash Table, String, Sliding Window	Medium	95	0.4%
5	Longest Common Prefix Array, String, Trie	Easy	95	0.5%
6	Group Anagrams Array, Hash Table, String, Sorting	Medium	95	0.7%
7	Merge Intervals Array, Sorting	Medium	95	0.5%
8	Word Ladder II Hash Table, String, Backtracking, Breadth-First Search	Hard	95	0.3%
9	Word Ladder Hash Table, String, Breadth-First Search	Hard	95	0.5%
10	Reverse Words in a String Two Pointers, String	Medium	95	0.6%
11	Active Businesses Database	Medium	95	0.7%
12	Reverse Linked List Linked List, Recursion	Easy	95	0.8%
13	Course Schedule Depth-First Search, Breadth-First Search, Graph Theory, Topological Sort	Medium	95	0.5%
14	The Skyline Problem Array, Divide and Conquer, Binary Indexed Tree, Segment Tree, Sweep Line, Sorting, Heap (Priority Queue), Ordered Set	Hard	95	0.5%
15	Valid Anagram Hash Table, String, Sorting	Easy	95	0.7%
16	Top K Frequent Elements Array, Hash Table, Divide and Conquer, Sorting, Heap (Priority Queue), Bucket Sort, Counting, Quickselect	Medium	95	0.7%
17	Insert Delete GetRandom O(1) Array, Hash Table, Math, Design, Randomized	Medium	95	0.6%
18	Insert Delete GetRandom O(1) - Duplicates allowed Array, Hash Table, Math, Design, Randomized	Hard	95	0.4%
19	Decode String String, Stack, Recursion	Medium	95	0.6%
20	String Compression Two Pointers, String	Medium	95	0.6%
21	Check If a Word Occurs As a Prefix of Any Word in a Sentence Two Pointers, String, String Matching	Easy	95	0.7%
22	Find the Closest Palindrome Math, String	Hard	95	0.3%
23	Minimum Index Sum of Two Lists Array, Hash Table, String	Easy	95	0.6%
24	Top K Frequent Words Array, Hash Table, String, Trie, Sorting, Heap (Priority Queue), Bucket Sort, Counting	Medium	95	0.6%
25	Letter Case Permutation String, Backtracking, Bit Manipulation	Medium	95	0.8%
26	Remove Colored Pieces if Both Neighbors are the Same Color Math, String, Greedy, Game Theory	Medium	95	0.6%
27	Shortest and Lexicographically Smallest Beautiful String String, Sliding Window	Medium	55	0.4%

How to read this list

The tabs at the top split the questions by how recently people said they were asked in interviews. "Last 30 Days" is the past month, "Last 3 Months" is the past quarter, and so on. "All Time" is every question on record for this company.

Frequency is a score from 0 to 100 for how often a question showed up in that time window. A higher number means it came up more often, so the list starts with the most common questions first. Acceptance is the share of submissions that pass on LeetCode. Click any question to open it on LeetCode.