IXL LeetCode Questions
17 questions all-time · 3 easy · 11 medium · 3 hard
| # | Problem | Difficulty | Frequency | Acceptance |
|---|---|---|---|---|
| 1 | Range Addition II Array, Math | Easy | 100 | 57.3% |
| 2 | Fraction Addition and Subtraction Math, String, Simulation | Medium | 92 | 66.1% |
| 3 | Palindrome Linked List Linked List, Two Pointers, Stack, Recursion | Easy | 90 | 55.9% |
| 4 | Stickers to Spell Word Array, Hash Table, String, Dynamic Programming, Backtracking, Bit Manipulation, Memoization, Bitmask | Hard | 88 | 50.0% |
| 5 | Merge k Sorted Lists Linked List, Divide and Conquer, Heap (Priority Queue), Merge Sort | Hard | 86 | 56.8% |
| 6 | Merge Intervals Array, Sorting | Medium | 86 | 49.4% |
| 7 | Design Snake Game Array, Hash Table, Design, Queue, Simulation | Medium | 86 | 39.7% |
| 8 | Find the Derangement of An Array Math, Dynamic Programming, Combinatorics | Medium | 86 | 41.7% |
| 9 | Fraction to Recurring Decimal Hash Table, Math, String | Medium | 86 | 26.2% |
| 10 | Find Median from Data Stream Two Pointers, Design, Sorting, Heap (Priority Queue), Data Stream | Hard | 82 | 53.3% |
| 11 | Minimum Number of Steps to Make Two Strings Anagram Hash Table, String, Counting | Medium | 76 | 82.2% |
| 12 | Find Peak Element Array, Binary Search | Medium | 72 | 46.5% |
| 13 | 1-bit and 2-bit Characters Array | Easy | 67 | 45.1% |
| 14 | Basic Calculator II Math, String, Stack | Medium | 67 | 45.8% |
| 15 | Insert Delete GetRandom O(1) Array, Hash Table, Math, Design, Randomized | Medium | 61 | 55.0% |
| 16 | Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts Array, Greedy, Sorting | Medium | 61 | 41.2% |
| 17 | Course Schedule Depth-First Search, Breadth-First Search, Graph, Topological Sort | Medium | 52 | 49.2% |
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.