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Showing 20 of 401 questions
Longest Substring Without Repeating Characters
Medium
Strings
Hash Tables
Sliding Window
★
LeetCode #3
Longest Turbulent Subarray
Medium
Arrays
Dynamic Programming
Sliding Window
★
Dynamic Programming
1
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3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
LeetCode #978
Longest Valid Parentheses
Hard
Strings
Stack
Dynamic Programming
Dynamic Programming
Monotonic Stack
★
LeetCode #32
Lowest Common Ancestor of a Binary Search Tree
Medium
Trees
Binary Tree Traversal
Binary Search
★
LeetCode #235
LRU Cache
Medium
Linked Lists
Hash Tables
LinkedList In-Place Reversal
★
LeetCode #146
Majority Element II
Medium
Arrays
Hash Tables
Greedy
★
LeetCode #229
Majority Element
Easy
Arrays
Hash Tables
Greedy
★
LeetCode #169
Matchsticks to Square
Medium
Arrays
Recursion
Backtracking
★
LeetCode #473
Max Area of Island
Medium
Arrays
Graphs
DFS (Depth-First Search)
BFS (Breadth-First Search)
★
Matrix Traversal
LeetCode #695
Maximum Depth of Binary Tree
Easy
Trees
Recursion
DFS (Depth-First Search)
BFS (Breadth-First Search)
★
Binary Tree Traversal
LeetCode #104
Maximum Frequency Stack
Hard
Stack
Hash Tables
Monotonic Stack
★
Hashing
LeetCode #895
Maximum Fruits Harvested After at Most K Steps
Hard
Arrays
Binary Search
Sliding Window
★
Prefix Sum
Two Pointers
LeetCode #2106
Maximum Length of Pair Chain
Medium
Arrays
Dynamic Programming
Sorting
Greedy
Overlapping Intervals
★
LeetCode #646
Maximum Product Subarray
Medium
Arrays
Dynamic Programming
Dynamic Programming
★
LeetCode #152
Maximum Subarray
Medium
Arrays
Dynamic Programming
Dynamic Programming
★
LeetCode #53
Maximum Sum Circular Subarray
Medium
Arrays
Dynamic Programming
Dynamic Programming
★
LeetCode #918
Median of Two Sorted Arrays
Hard
Arrays
Binary Search
Binary Search
★
LeetCode #4
Merge Intervals
Medium
Arrays
Sorting
Overlapping Intervals
★
LeetCode #56
Merge k Sorted Lists
Hard
Linked Lists
Heap
Heap / Priority Queue
★
LeetCode #23
Merge Sorted Array
Easy
Arrays
Two Pointers
Sorting
Two Pointers
★
LeetCode #88