LeetCode 75

Array / String
Array / String
9
Easy1768. Merge Strings Alternately
Easy1071. Greatest Common Divisor of Strings
Easy1431. Kids With the Greatest Number of Candies
Easy605. Can Place Flowers
Easy345. Reverse Vowels of a String
Medium151. Reverse Words in a String
Medium238. Product of Array Except Self
Medium334. Increasing Triplet Subsequence
Medium443. String Compression
Two Pointers
Two Pointers
4
Easy283. Move Zeroes
Easy392. Is Subsequence
Medium11. Container With Most Water
Medium1679. Max Number of K-Sum Pairs
Sliding Window
Sliding Window
4
Easy643. Maximum Average Subarray I
Medium1456. Maximum Number of Vowels in a Substring of Given Length
Medium1004. Max Consecutive Ones III
Medium1493. Longest Subarray of 1's After Deleting One Element
Prefix Sum
Prefix Sum
2
Easy1732. Find the Highest Altitude
Easy724. Find Pivot Index
Hash Map / Set
Hash Map / Set
4
Easy2215. Find the Difference of Two Arrays
Easy1207. Unique Number of Occurrences
Medium1657. Determine if Two Strings Are Close
Medium2352. Equal Row and Column Pairs
Stack
Stack
3
Medium2390. Removing Stars From a String
Medium735. Asteroid Collision
Medium394. Decode String
Queue
Queue
2
Easy933. Number of Recent Calls
Medium649. Dota2 Senate
Linked List
Linked List
4
Medium2095. Delete the Middle Node of a Linked List
Medium328. Odd Even Linked List
Easy206. Reverse Linked List
Medium2130. Maximum Twin Sum of a Linked List
Binary Tree — DFS
Binary Tree — DFS
6
Easy104. Maximum Depth of Binary Tree
Easy872. Leaf-Similar Trees
Medium1448. Count Good Nodes in Binary Tree
Medium437. Path Sum III
Medium1372. Longest ZigZag Path in a Binary Tree
Medium236. Lowest Common Ancestor of a Binary Tree
Binary Tree — BFS
Binary Tree — BFS
2
Medium199. Binary Tree Right Side View
Medium1161. Maximum Level Sum of a Binary Tree
Binary Search Tree
Binary Search Tree
2
Easy700. Search in a Binary Search Tree
Medium450. Delete Node in a BST
Graphs — DFS
Graphs — DFS
4
Medium841. Keys and Rooms
Medium547. Number of Provinces
Medium1466. Reorder Routes to Make All Paths Lead to the City Zero
Medium399. Evaluate Division
Graphs — BFS
Graphs — BFS
2
Medium1926. Nearest Exit from Entrance in Maze
Medium994. Rotting Oranges
Heap / Priority Queue
Heap / Priority Queue
4
Medium215. Kth Largest Element in an Array
Medium2336. Smallest Number in Infinite Set
Medium2542. Maximum Subsequence Score
Medium2462. Total Cost to Hire K Workers
Binary Search
Binary Search
4
Easy374. Guess Number Higher or Lower
Medium2300. Successful Pairs of Spells and Potions
Medium162. Find Peak Element
Medium875. Koko Eating Bananas
Backtracking
Backtracking
2
Medium17. Letter Combinations of a Phone Number
Medium216. Combination Sum III
DP — 1D
DP — 1D
4
Easy1137. N-th Tribonacci Number
Easy746. Min Cost Climbing Stairs
Medium198. House Robber
Medium790. Domino and Tromino Tiling
DP — Multidimensional
DP — Multidimensional
4
Medium62. Unique Paths
Medium1143. Longest Common Subsequence
Medium714. Best Time to Buy and Sell Stock with Transaction Fee
Medium72. Edit Distance
Bit Manipulation
Bit Manipulation
3
Easy338. Counting Bits
Easy136. Single Number
Medium1318. Minimum Flips to Make a OR b Equal to c
Trie
Trie
2
Medium208. Implement Trie (Prefix Tree)
Medium1268. Search Suggestions System
Intervals
Intervals
2
Medium435. Non-overlapping Intervals
Medium452. Minimum Number of Arrows to Burst Balloons
Monotonic Stack
Monotonic Stack
2
Medium739. Daily Temperatures
Medium901. Online Stock Span