Bloomberg | BeyondBasics

Bloomberg

Previous Year Questions

Copy List with Random Pointer

Design Underground System

Flatten a Multilevel Doubly Linked List

Number of Islands

Add Two Numbers II

Sort Characters By Frequency

Add Two Numbers

Invalid Transactions

Populating Next Right Pointers in Each Node II

Trapping Rain Water

Valid Parentheses

Insert Delete GetRandom O(1)

Validate Binary Search Tree

Meeting Rooms II

Best Time to Buy and Sell Stock

First Unique Character in a String

Merge Intervals

Shortest Palindrome

Number of Ships in a Rectangle

Two City Scheduling

Populating Next Right Pointers in Each Node

Elimination Game

Longest Substring Without Repeating Characters

Merge k Sorted Lists

Remove All Adjacent Duplicates in String II

Island Perimeter

Alien Dictionary

Flatten Binary Tree to Linked List

Median of Two Sorted Arrays

Encode and Decode Strings

Search in Rotated Sorted Array

Integer to Roman

Reverse Linked List

Remove Invalid Parentheses

Merge Two Sorted Lists

Reverse Integer

Maximum Product of Three Numbers

Moving Average from Data Stream

Construct Binary Tree from Preorder and Inorder Traversal

Maximum Subarray

Top K Frequent Words

Longest Palindromic Substring

Sliding Window Maximum

Find Median from Data Stream

Lowest Common Ancestor of a Binary Tree

Integer to English Words

Valid Triangle Number

Intersection of Two Linked Lists

Reconstruct Itinerary

Vertical Order Traversal of a Binary Tree

Binary Search Tree Iterator

Regular Expression Matching

Best Time to Buy and Sell Stock II

All Paths From Source to Target

Binary Tree Level Order Traversal

String Compression

Merge Sorted Array

Binary Tree Vertical Order Traversal

Shuffle an Array

Lowest Common Ancestor of a Binary Search Tree

Design Browser History

Evaluate Division

Binary Tree Right Side View

Maximum Width of Binary Tree

Employee Free Time

Largest Rectangle in Histogram

String to Integer (atoi)

Longest Consecutive Sequence

First Missing Positive

Find Peak Element

Daily Temperatures

Odd Even Linked List

Encode and Decode TinyURL

Top K Frequent Elements

Palindrome Linked List

Pascal's Triangle

Next Permutation

Container With Most Water

Next Greater Element I

Excel Sheet Column Number

Palindrome Number

Remove All Adjacent Duplicates In String

Find First and Last Position of Element in Sorted Array

Intersection of Two Arrays

Sparse Matrix Multiplication

Wildcard Matching

Design Hit Counter

Kth Smallest Element in a BST

Binary Tree Maximum Path Sum

Minimum Path Sum

Kth Largest Element in an Array

Design Snake Game

Letter Combinations of a Phone Number

Isomorphic Strings

Max Area of Island

Generate Parentheses

Majority Element II

Next Greater Element II

Minimum Size Subarray Sum

Number of Distinct Islands

Valid Word Square

Walls and Gates

Shortest Distance to a Character

Search a 2D Matrix II

Maximal Rectangle

Unique Paths II

Minimum Window Substring

Subtree of Another Tree

Reverse Words in a String

Find Duplicate Subtrees

Minimize Malware Spread

Product of Array Except Self

Dice Roll Simulation

Subarray Sum Equals K

Find All Duplicates in an Array

ZigZag Conversion

Find the Duplicate Number

Count of Smaller Numbers After Self

Implement Queue using Stacks

Implement Trie (Prefix Tree)

Find Bottom Left Tree Value

Diameter of Binary Tree

Rectangle Overlap

Roman to Integer

Inorder Successor in BST II

Longest Increasing Path in a Matrix

Missing Element in Sorted Array

Binary Tree Inorder Traversal

Reverse Linked List II

Find Minimum in Rotated Sorted Array

Course Schedule

Remove K Digits

Find K Closest Elements

Construct Binary Tree from Preorder and Postorder Traversal

Climbing Stairs

Invert Binary Tree

Remove Nth Node From End of List

Remove Linked List Elements

Design A Leaderboard

Minimum Remove to Make Valid Parentheses

Interleaving String

Flip Binary Tree To Match Preorder Traversal

Minimum Window Subsequence

Third Maximum Number

Pacific Atlantic Water Flow

Implement Rand10() Using Rand7()

Lexicographical Numbers

Swap Nodes in Pairs

Delete Node in a Linked List

Peak Index in a Mountain Array

Convert Binary Search Tree to Sorted Doubly Linked List

Design Tic-Tac-Toe

Best Time to Buy and Sell Stock IV

Implement Stack using Queues

Count Univalue Subtrees

Integer Replacement

Recover Binary Search Tree

Search in Rotated Sorted Array II

Valid Parenthesis String

Valid Palindrome

Kth Smallest Element in a Sorted Matrix

Minimum Number of Steps to Make Two Strings Anagram

Best Time to Buy and Sell Stock III

Logger Rate Limiter

Convert Sorted List to Binary Search Tree

Sum of Left Leaves

Flatten Nested List Iterator

Distant Barcodes

Binary Tree Zigzag Level Order Traversal

Non-overlapping Intervals

Implement strStr()

Insert into a Sorted Circular Linked List

K-diff Pairs in an Array

Remove Duplicates from Sorted List II

Design Bounded Blocking Queue

Convert Sorted Array to Binary Search Tree

Remove Duplicates from Sorted Array

Palindrome Pairs

Linked List Cycle

Design Search Autocomplete System

Permutation in String

Inorder Successor in BST

Broken Calculator

Palindrome Partitioning

Serialize and Deserialize Binary Tree

Minimum Cost to Hire K Workers

Reverse Words in a String III

Largest Sum of Averages

Sentence Similarity II

Search a 2D Matrix

Find All Numbers Disappeared in an Array

Unique Binary Search Trees

Number of Longest Increasing Subsequence

Range Sum Query - Immutable

Letter Case Permutation

Maximum Number of Occurrences of a Substring

Number of Dice Rolls With Target Sum

Delete Node in a BST

Search Insert Position

All O`one Data Structure

Binary Tree Coloring Game

Two Sum II - Input array is sorted

Longest Common Prefix

Hand of Straights

Filling Bookcase Shelves

Arithmetic Slices

Intersection of Two Arrays II

Permutations II

Longest Palindromic Subsequence

Longest Valid Parentheses

Substring with Concatenation of All Words

Max Points on a Line

Count Complete Tree Nodes

Kth Largest Element in a Stream

Find Pivot Index

Best Time to Buy and Sell Stock with Transaction Fee

Longest Substring with At Least K Repeating Characters

Minimum Insertion Steps to Make a String Palindrome

Combination Sum III

Contains Duplicate II

Sum Root to Leaf Numbers

Maximum Product Subarray

Interval List Intersections

Next Greater Element III

Number of Recent Calls

Longest Turbulent Subarray

Second Highest Salary

Maximum Depth of Binary Tree

Maximum Frequency Stack

Balanced Binary Tree

Single Element in a Sorted Array

Cheapest Flights Within K Stops

Divide Two Integers

Cousins in Binary Tree

Closest Binary Search Tree Value

Binary Tree Preorder Traversal

Maximum Length of Pair Chain

Longest Substring with At Most K Distinct Characters

2 Keys Keyboard

Increasing Triplet Subsequence

Find Common Characters

Contains Duplicate

Lowest Common Ancestor of Deepest Leaves

Shortest Unsorted Continuous Subarray

Insertion Sort List

Minimum Height Trees

Course Schedule II

Combination Sum

Combination Sum II

First Bad Version

Basic Calculator

Longest Repeating Character Replacement

Merge Two Binary Trees

Find All Anagrams in a String

Queue Reconstruction by Height

All Nodes Distance K in Binary Tree

Factorial Trailing Zeroes

Prison Cells After N Days

Maximum Depth of N-ary Tree

Min Cost Climbing Stairs

Construct Binary Tree from Inorder and Postorder Traversal

Squares of a Sorted Array

Running Sum of 1d Array

Palindrome Permutation

Read N Characters Given Read4 II - Call multiple times

Managers with at Least 5 Direct Reports

Trim a Binary Search Tree

Path In Zigzag Labelled Binary Tree

Allocate Mailboxes

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