LeetCode Problem Lists

LeetCode 15 PatternsAdvanced SQL 50Grind 75SQL 50

Two Pointers

• 1. Two Sum
• 167. Two Sum II - Input Array Is Sorted
• 15. 3Sum
• 11. Container With Most Water

Overlapping Intervals

• 56. Merge Intervals
• 57. Insert Interval
• 435. Non-overlapping Intervals

Sliding Window

• 643. Maximum Average Subarray I
• 3. Longest Substring Without Repeating Characters
• 76. Minimum Window Substring

Prefix Sum

• 303. Range Sum Query - Immutable
• 525. Contiguous Array
• 560. Subarray Sum Equals K

Fast and Slow Pointers

• 141. Linked List Cycle
• 202. Happy Number
• 287. Find the Duplicate Number

Linked List In-place Reversal

• 206. Reverse Linked List
• 92. Reverse Linked List II
• 24. Swap Nodes in Pairs

Monotonic Stack

• 496. Next Greater Element I
• 739. Daily Temperatures
• 84. Largest Rectangle in Histogram

Top K Elements

• 215. Kth Largest Element in an Array
• 347. Top K Frequent Elements
• 373. Find K Pairs with Smallest Sums

Dynamic Programming

• 70. Climbing Stairs
• 322. Coin Change
• 300. Longest Increasing Subsequence
• 312. Burst Balloons
• 416. Partition Equal Subset Sum
• 1143. Longest Common Subsequence

Backtracking

• 46. Permutations
• 78. Subsets
• 51. N-Queens

Binary Search

• 374. Guess Number Higher or Lower
• 2300. Successful Pairs of Spells and Potions
• 162. Find Peak Element
• 875. Koko Eating Bananas

Modified Binary Search

• 33. Search in Rotated Sorted Array
• 153. Find Minimum in Rotated Sorted Array
• 240. Search a 2D Matrix II

Binary Tree Traversal

• 257. Binary Tree Paths
• 230. Kth Smallest Element in a BST
• 124. Binary Tree Maximum Path Sum
• 107. Binary Tree Level Order Traversal II

DFS

• 133. Clone Graph
• 113. Path Sum II
• 210. Course Schedule II

BFS

• 102. Binary Tree Level Order Traversal
• 994. Rotting Oranges
• 127. Word Ladder

Matrix Traversal

• 733. Flood Fill
• 200. Number of Islands
• 130. Surrounded Regions

Advanced SQL 50

Grind 75

SQL 50