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Time Based Key-Value Store - HashMap + Ordered Map
Binary Search
C++
Design
Hash Table
Medium
String
-
Plus One - Simple c++ solution with explanation
Array
C++
Easy
Math
-
Binary Tree Zigzag Level Order Traversal - BFS using Queue
Binary Tree
Breadth-First Search
C++
Medium
Queue
Tree
-
Add One Row to Tree - Easy to understand DFS solution
Binary Tree
Breadth-First Search
Depth-First Search
Medium
Tree
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Spiral Matrix - Spiral traversal
Array
C++
Matrix
Medium
Simulation
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Search in Rotated Sorted Array - Faster than 100% -- Rotation pivot using binary search
Array
Binary Search
Medium
-
Longest Increasing Subsequence - Two DP solutions
Array
Binary Search
C++
Dynamic Programming
Medium
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Largest Divisible Subset - DP faster than 95%
Array
Dynamic Programming
Math
Medium
Sorting