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Uber

Previous Year Questions

Construct Quad Tree

Word Pattern II

Number of Islands II

Set Intersection Size At Least Two

Reconstruct Itinerary

Flatten Nested List Iterator

Text Justification

Optimal Account Balancing

Trips and Users

Merge Intervals

Palindrome Permutation II

Print Binary Tree

Basic Calculator II

Trapping Rain Water

Number of Islands

Interval List Intersections

Serialize and Deserialize Binary Tree

Meeting Rooms II

Serialize and Deserialize N-ary Tree

Insert Delete GetRandom O(1)

Logger Rate Limiter

Basic Calculator III

Fraction to Recurring Decimal

Reaching Points

Sliding Window Maximum

Basic Calculator

Letter Combinations of a Phone Number

Design Search Autocomplete System

Walls and Gates

Palindrome Pairs

Exclusive Time of Functions

Longest Consecutive Sequence

Insert Delete GetRandom O(1) - Duplicates allowed

Find First and Last Position of Element in Sorted Array

Water and Jug Problem

Alien Dictionary

Factor Combinations

Random Pick with Weight

Max Points on a Line

Regular Expression Matching

Minimum Window Substring

Longest Increasing Path in a Matrix

Recover Binary Search Tree

Solve the Equation

Connecting Cities With Minimum Cost

Generate Parentheses

Add Two Numbers

Binary Search Tree Iterator

Insert Interval

Longest Valid Parentheses

Flatten 2D Vector

Encode and Decode TinyURL

Median of Two Sorted Arrays

Integer to English Words

Shortest Word Distance II

Stamping The Sequence

The Skyline Problem

Merge k Sorted Lists

Longest Absolute File Path

Implement Trie (Prefix Tree)

Find K Closest Elements

Read N Characters Given Read4 II - Call multiple times

Valid Parentheses

Word Abbreviation

Longest Substring Without Repeating Characters

Kth Smallest Number in Multiplication Table

Maximal Rectangle

Design Snake Game

Course Schedule

Moving Average from Data Stream

Subtract the Product and Sum of Digits of an Integer

Remove Invalid Parentheses

Design Hit Counter

All Nodes Distance K in Binary Tree

Interleaving String

Shortest Word Distance

Surrounded Regions

Maximum Vacation Days

Maximum Subarray

Merge Two Sorted Lists

Design Bounded Blocking Queue

Combination Sum

Expression Add Operators

Perfect Squares

Student Attendance Record II

Employee Free Time

Split Array With Same Average

Maximum frequency Stack

Evaluate Division

Product of Array Except Self

Longest Palindromic Substring

Find Median from Data Stream

Container With Most Water

Count of Smaller Numbers After Self

Palindrome Partitioning

Sparse Matrix Multiplication

Search a 2D Matrix

One Edit Distance

Best Time to Buy and Sell Stock

Sort Characters By frequency

Parallel Courses

Falling Squares

Pancake Sorting

Design Tic-Tac-Toe

Search in Rotated Sorted Array

All O`one Data Structure

Squares of a Sorted Array

Roman to Integer

Copy List with Random Pointer

Find Duplicate Subtrees

Spiral Matrix II

Strong Password Checker

Add Two Numbers II

First Missing Positive

Multiply Strings

Shortest Bridge

Delete Node in a BST

Array of Doubled Pairs

Next Permutation

Reorganize String

Number of Distinct Islands

Reverse Words in a String II

Serialize and Deserialize BST

Find All Anagrams in a String

Predict the Winner

Swap Nodes in Pairs

Palindrome Partitioning III

Permutation in String

Group Shifted Strings

Add and Search Word - Data structure design

Binary Tree Maximum Path Sum

Distribute Coins in Binary Tree

Remove Comments

Regions Cut By Slashes

Max Area of Island

Course Schedule II

Shortest Distance from All Buildings

Combination Sum II

Longest Substring with At Least K Repeating Characters

Max Chunks To Make Sorted

Longest Substring with At Most K Distinct Characters

Verify Preorder Sequence in Binary Search Tree

Time Based Key-Value Store

Pascal's Triangle

Binary Tree Cameras

Lowest Common Ancestor of a Binary Search Tree

Reverse Linked List

Flatten a Multilevel Doubly Linked List

Kth Smallest Element in a BST

Palindromic Substrings

ZigZag Conversion

Climbing Stairs

Majority Element II

Construct Binary Tree from Preorder and Postorder Traversal

House Robber III

Perfect Rectangle

Making A Large Island

Most Profit Assigning Work

Lowest Common Ancestor of a Binary Tree

Palindrome Permutation

Maximum Sum Circular Subarray

Top K Frequent Words

Reverse Integer

Evaluate Reverse Polish Notation

Find the Closest Palindrome

Snakes and Ladders

Maximum Length of Pair Chain

Wiggle Subsequence

Best Time to Buy and Sell Stock II

Top K Frequent Elements

Kth Largest Element in an Array

Validate IP Address

Partition Equal Subset Sum

String to Integer (atoi)

Find Minimum in Rotated Sorted Array

Minimum Path Sum

Kth Smallest Element in a Sorted Matrix

K Closest Points to Origin

Capacity To Ship Packages Within D Days

Find the Celebrity

Binary Tree Longest Consecutive Sequence

Increasing Triplet Subsequence

Longest Increasing Subsequence

Remove Zero Sum Consecutive Nodes from Linked List

Merge Sorted Array

Permutations II

Binary Tree Level Order Traversal

Binary Search Tree to Greater Sum Tree

Find Peak Element

Minimum Cost For Tickets

Meeting Scheduler

Consecutive Numbers Sum

Human Traffic of Stadium

Custom Sort String

Subarray Sum Equals K

Delete and Earn

Next Closest Time

Binary Tree Right Side View

Random Pick Index

Next Greater Node In Linked List

Find the Distance Value Between Two Arrays

Validate Binary Search Tree

Implement Queue using Stacks

Valid Triangle Number

Flatten Binary Tree to Linked List

Daily Temperatures

Subarrays with K Different Integers

Valid Palindrome

Maximum Product Subarray

Nth Highest Salary

Shortest Path in Binary Matrix

Nested List Weight Sum

Second Minimum Node In a Binary Tree

Maximum Depth of Binary Tree

Convert Binary Search Tree to Sorted Doubly Linked List

Maximum Width of Binary Tree

Backspace String Compare

First Bad Version

Intersection of Two Arrays II

Remove Duplicates from Sorted Array

Longest Palindromic Subsequence

Shortest Unsorted Continuous Subarray

Find Minimum in Rotated Sorted Array II

Peak Index in a Mountain Array

Valid Mountain Array

Binary Tree Inorder Traversal

Binary Tree Postorder Traversal

Intersection of Two Arrays

Remove Linked List Elements

Employee Importance

Excel Sheet Column Number

Find K Pairs with Smallest Sums

Asteroid Collision

Random Pick with Blacklist

Minimum Score Triangulation of Polygon

Find the City With the Smallest Number of Neighbors at a Threshold Distance

Construct K Palindrome Strings

Course Schedule IV

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