Spotify
15 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 346. Moving Average from Data Stream | Easy | 100% | TopicsArrayDesignQueueData Stream |
| 3. Longest Substring Without Repeating Characters | Medium | 86.8% | TopicsHash TableStringSliding Window |
| 1152. Analyze User Website Visit Pattern | Medium | 86.8% | TopicsArrayHash TableStringSorting |
| 215. Kth Largest Element in an Array | Medium | 83.2% | TopicsArrayDivide and ConquerSortingHeap (Priority Queue)Quickselect |
| 1. Two Sum | Easy | 78.6% | TopicsArrayHash Table |
| Leetcodify Friends Recommendations | Hard | 78.6% | TopicsDatabase |
| Leetcodify Similar Friends | Hard | 78.6% | TopicsDatabase |
| 20. Valid Parentheses | Easy | 72.8% | TopicsStringStackBracket Sequences |
| Sliding Window Median | Hard | 69.2% | TopicsArrayHash TableSliding WindowHeap (Priority Queue)Treap |
| 295. Find Median from Data Stream | Hard | 69.2% | TopicsTwo PointersDesignSortingHeap (Priority Queue)Data Stream |
| 383. Ransom Note | Easy | 64.6% | TopicsHash TableStringCounting |
| Fibonacci Number | Easy | 58.8% | TopicsMathDynamic ProgrammingRecursionMemoization |
| 104. Maximum Depth of Binary Tree | Easy | 50.7% | TopicsTreeDepth-First SearchBreadth-First SearchBinary Tree |
| 125. Valid Palindrome | Easy | 50.7% | TopicsTwo PointersString |
| 242. Valid Anagram | Easy | 50.7% | TopicsHash TableStringSorting |
