Problems
Original multi-part problems based on Blind 75, NeetCode 150, and Grind 75
170 showing
Accounts Merge
Arrays & Hashing · Stringmedium
Asteroid Collision
Arrays & Hashing · Stackmedium
IP to CIDR
Bit Manipulation · Math & Geometrymedium
Largest Local Values in a Matrix
Arrays & Hashing · Simulationeasy
Add Binary
String · Math & Geometryeasy
Add Two Numbers
Linked List · Backtrackingmedium
Alien Dictionary
Arrays & Hashing · Stringhard
Balanced Binary Tree
BFS / DFS · Treeseasy
Binary Tree Level Order Traversal
BFS / DFS · Treesmedium
Binary Tree Right Side View
BFS / DFS · Treesmedium
Binary Tree Maximum Path Sum
Trees · Dynamic Programminghard
Basic Calculator
String · Stackhard
Best Time to Buy and Sell Stock
Arrays & Hashing · Sliding Windoweasy
Stock Trading with Cooldown
Arrays & Hashing · Dynamic Programmingmedium
Meeting Rooms II
Arrays & Hashing · Heap / Priority Queuemedium
Number of Connected Components in an Undirected Graph
BFS / DFS · Graphsmedium
Network Delay Time
BFS / DFS · Graphsmedium
Swim in Rising Water
Arrays & Hashing · Graphshard
Reconstruct Itinerary
Backtracking · BFS / DFShard
Min Cost to Connect All Points
Arrays & Hashing · Graphsmedium
Graph Valid Tree
BFS / DFS · Graphsmedium
Plus One
Arrays & Hashing · Math & Geometryeasy
Multiply Strings
Math & Geometry · Stringmedium
Pow(x, n)
Backtracking · Math & Geometrymedium
Sort Colors
Arrays & Hashing · Two Pointersmedium
Ransom Note
Arrays & Hashing · Stringeasy
Binary Search
Arrays & Hashing · Binary Searcheasy
Cheapest Flights Within K Stops
Arrays & Hashing · Graphsmedium
Burst Balloons
Arrays & Hashing · Dynamic Programminghard
Climbing Stairs
Dynamic Programming · Math & Geometryeasy
Showing 1–30 of 170