1
Q
Question
A
Topic
2
Q
- Two Sum
A
Array & Hashing
3
Q
- Valid Anagram
A
Array & Hashing
4
Q
- Contains Duplicate
A
Array & Hashing
5
Q
- Product of Array Except Self
A
Array & Hashing
6
Q
- Valid Parentheses
A
Stack
7
Q
- Best Time to Buy and Sell Stock
A
Array & Hashing
8
Q
- Valid Palindrome
A
Two Pointers
9
Q
- Invert Binary Tree
A
Trees
10
Q
- Lowest Common Ancestor of a Binary Search Tree
A
Trees
11
Q
- Binary Tree Level Order Traversal
A
Trees
12
Q
- Maximum Subarray
A
Divide & Conquer
13
Q
- Linked List Cycle
A
Linked List
14
Q
- Merge Two Sorted Lists
A
Linked List
15
Q
- Reverse Linked List
A
Linked List
16
Q
- Contains Duplicate II
A
Array & Hashing
17
Q
- 3Sum
A
Two Pointers
18
Q
- Container With Most Water
A
Two Pointers
19
Q
- Product of Array Except Self (Revisited)
A
Array & Hashing
20
Q
- Two Sum II Input Array Is Sorted
A
Two Pointers
21
Q
- Trapping Rain Water
A
Two Pointers
22
Q
- Remove Nth Node From End of List
A
Linked List
23
Q
- LRU Cache
A
Hash Table + Linked List
24
Q
- Longest Substring Without Repeating Characters
A
Sliding Window
25
24. Longest Repeating Character Replacement
Sliding Window
26
25. Minimum Window Substring
Sliding Window
27
26. Permutation in String
Sliding Window
28
27. Search in Rotated Sorted Array
Binary Search
29
28. Find Minimum in Rotated Sorted Array
Binary Search
30
29. Maximum Product Subarray
Dynamic Programming
31
30. Number of Islands
Graph
32
31. Number of Provinces
Graph
33
32. Balanced Binary Tree
Trees
34
33. Same Tree
Trees
35
34. Subtree of Another Tree
Trees
36
35. Diameter of Binary Tree
Trees
37
36. Word Search
Backtracking
38
37. Clone Graph
Graph
39
38. Pacific Atlantic Water Flow
Graph
40
39. Longest Consecutive
Hash Map
41
40. Alien Dictionary
Topological Sort
Neetcode tamizh
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