Intel LeetCode Questions
25 questions all-time · 10 easy · 14 medium · 1 hard
| # | Problem | Difficulty | Frequency | Acceptance |
|---|---|---|---|---|
| 1 | Maximum Nesting Depth of the Parentheses String, Stack | Easy | 100 | 84.3% |
| 2 | Find Consecutive Integers from a Data Stream Hash Table, Design, Queue, Counting, Data Stream | Medium | 100 | 49.4% |
| 3 | Trapping Rain Water Array, Two Pointers, Dynamic Programming, Stack, Monotonic Stack | Hard | 100 | 65.1% |
| 4 | Valid Parentheses String, Stack | Easy | 94 | 42.3% |
| 5 | Number of Islands Array, Depth-First Search, Breadth-First Search, Union Find, Matrix | Medium | 94 | 62.3% |
| 6 | Copy List with Random Pointer Hash Table, Linked List | Medium | 87 | 60.5% |
| 7 | Two Sum Array, Hash Table | Easy | 83 | 55.8% |
| 8 | Longest Substring Without Repeating Characters Hash Table, String, Sliding Window | Medium | 77 | 36.9% |
| 9 | Count Primes Array, Math, Enumeration, Number Theory | Medium | 77 | 34.8% |
| 10 | Best Time to Buy and Sell Stock II Array, Dynamic Programming, Greedy | Medium | 70 | 69.5% |
| 11 | Reverse Integer Math | Medium | 70 | 30.3% |
| 12 | LRU Cache Hash Table, Linked List, Design, Doubly-Linked List | Medium | 70 | 45.2% |
| 13 | Best Time to Buy and Sell Stock Array, Dynamic Programming | Easy | 60 | 55.3% |
| 14 | Add Two Numbers Linked List, Math, Recursion | Medium | 60 | 46.2% |
| 15 | Climbing Stairs Math, Dynamic Programming, Memoization | Easy | 60 | 53.5% |
| 16 | Merge Two Sorted Lists Linked List, Recursion | Easy | 60 | 66.8% |
| 17 | Reverse Words in a String Two Pointers, String | Medium | 60 | 51.9% |
| 18 | Palindrome Number Math | Easy | 60 | 59.2% |
| 19 | Container With Most Water Array, Two Pointers, Greedy | Medium | 60 | 57.8% |
| 20 | Merge Sorted Array Array, Two Pointers, Sorting | Easy | 60 | 52.9% |
| 21 | Rotate Image Array, Math, Matrix | Medium | 60 | 77.9% |
| 22 | Linked List Cycle Hash Table, Linked List, Two Pointers | Easy | 60 | 52.6% |
| 23 | Valid Palindrome Two Pointers, String | Easy | 60 | 51.0% |
| 24 | Maximum Subarray Array, Divide and Conquer, Dynamic Programming | Medium | 60 | 52.1% |
| 25 | Top K Frequent Words Array, Hash Table, String, Trie, Sorting, Heap (Priority Queue), Bucket Sort, Counting | Medium | 60 | 59.3% |
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.