LinkedIn

Problems tagged as asked at LinkedIn, grouped by pattern.

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Hash Table

Isomorphic StringsStart here
Easy

Sliding Window

Minimum Window Substring
Hard

Stack

Evaluate Reverse Polish Notation
Medium

String

Valid Number
Hard
Text Justification
Hard

Binary Search

Find First and Last Position of Element in Sorted Array
Medium

Tree

Symmetric Tree
Easy
Maximum Depth of Binary Tree
Easy
Binary Tree Level Order Traversal
Medium
Lowest Common Ancestor of a Binary Tree
Medium
Serialize and Deserialize Binary Tree
Hard

Heap

Find K Pairs with Smallest Sums
Medium

Dynamic Programming

Maximum Subarray
Medium
Maximum Product Subarray
Medium
House Robber
Medium

Intervals

Insert Interval
Medium

Backtracking

Permutations
Medium

Math

Pow(x, n)
Medium
Max Points on a Line
Hard

Design

Two Sum III - Data structure design
Easy
Binary Search Tree Iterator
Medium