Add Binary
Problem Statement
239 docs tagged with "facebook"
View All TagsAdd Two Numbers
Problem Statement
Add Two Numbers II
Problem Statement
Battleships in a Board
Problem Statement
Binary Tree Inorder Traversal
Problem Statement
Binary Tree Level Order Traversal
Problem Statement
Binary Tree Right Side View
Problem Statement
Bulb Switcher
Problem Statement
Burst Balloons
Problem Statement
Car Pooling
Problem Statement
Cheapest Flights Within K Stops
Problem Statement
Climbing Stairs
Problem Statement
Design Add and Search Words Data Structure
Problem Statement
Encode and Decode Strings
Problem Statement
Find Peak Element
Problem Statement
Find pivot index
Problem Statement
h-Index
Problem Statement
H-Index II
Problem Statement
Linked List Cycle
Problem Statement
Min Stack
Problem Statement
Minesweeper
Problem Statement
Minimum Add to Make Parentheses Valid
Problem Statement
Minimum Area Rectangle
Problem Statement
Minimum Area Rectangle II
Problem Statement
Minimum Cost For Tickets
Problem Statement
Minimum Depth of Binary Tree
Problem Statement
Minimum Height Trees
Problem Statement
Minimum Number of Arrows to Burst Balloons
Problem Statement
Minimum Number of K Consecutive Bit Flips
Problem Statement
Minimum Number of K Consecutive Bit Flips
Problem Statement
Minimum Remove to Make Valid Parentheses
Problem Statement
Minimum Size Subarray Sum
Problem Statement
Minimum Swaps To Make Sequences Increasing
Problem Statement
Minimum Time to Collect All Apples in a Tree
Problem Statement
Minimum Time Visiting All Points
Problem Statement
Missing Number
Problem Statement
Monotonic Array
Problem Statement
Monotonic Array
Problem Statement
Move Zeroes
Problem Statement
Moving Stones Until Consecutive
Problem Statement
Moving Stones Until Consecutive II
Problem Statement
Multiply Strings
Problem Statement
N-th Tribonacci Number
Problem Statement
Next Greater Element I
Problem Statement
Next Greater Element II
Problem Statement
Next Greater Element III
Problem Statement
Next Greater Node In Linked List
Problem Statement
Next Permutation
Problem Statement
Non-overlapping Intervals
Problem Statement
Nth Digit
Problem Statement
Number of 1 Bits
Problem Statement
Number of Atoms
Problem Statement
Number of Closed Islands
Problem Statement
Number of Days Between Two Dates
Problem Statement
Number of Islands
Problem Statement
Number of Longest Increasing Subsequence
Problem Statement
Number of Matching Subsequences
Problem Statement
Number of Subsequences That Satisfy the Given Sum Condition
Problem Statement
Number of Ways to Paint N × 3 Grid
Problem Statement
Number of Ways to Stay in the Same Place After Some Steps
Problem Statement
Odd Even Linked List
Problem Statement
Open the Lock
Problem Statement
Pacific Atlantic Water Flow
Problem Statement
Palindrome Linked List
Problem Statement
Palindrome Number
Problem Statement
Palindrome Pairs
Problem Statement
Palindromic Substring
Problem Statement
Pancake Sorting
Problem Statement
Partition Array for Maximum Sum
Problem Statement
Partition Equal Subset Sum
Problem Statement
Partition Equal Subset Sum
Problem Statement
Partition To k Equal Sum Subsets
Problem Statement
Pascal's Triangle
Problem Statement
Path Sum
Problem Statement
Path Sum II
Problem Statement
Path Sum III
Problem Statement
Path with Maximum Gold
Problem Statement
Peak Index in a Mountain Array
Problem Statement
Peak Index in a Mountain Array
Problem Statement
Perfect Squares
Problem Statement
Permutation in String
Problem Statement
Permutation Sequence
Problem Statement
Permutations
Problem Statement
Permutations II
Problem Statement
Plus One
Problem Statement
Populating Next Right Pointers in Each Node
Problem Statement
Populating Next Right Pointers in Each Node II
Problem Statement
Possible Bipartition
Problem Statement
Pow(x, n)
Problem Statement
Prefix and Suffix Search
Problem Statement
Previous Permutation With One Swap
Problem Statement
Print Binary Tree
Problem Statement
Product of Array Except Self
Problem Statement
Queue Reconstruction by Height
Problem Statement
Random Pick Index
Problem Statement
Random Pick with Weight
Problem Statement
Range Sum of BST
Problem Statement
Range Sum Query - Immutable
Problem Statement
Range Sum Query - Mutable
Problem Statement
Range Sum Query 2D - Immutable
Problem Statement
Reconstruct Itinerary
Problem Statement
Recover Binary Search Tree
Problem Statement
Rectangle Overlap
Problem Statement
Regular Expression Matching
Problem Statement
Remove All Adjacent Duplicates In String
Problem Statement
Remove All Adjacent Duplicates in String II
Problem Statement
Remove Duplicate Letters
Problem Statement
Remove Duplicates from Sorted Array
Problem Statement
Remove Duplicates from Sorted Array II
Problem Statement
Remove Duplicates from Sorted List
Problem Statement
Remove Invalid Parentheses
Problem Statement
Remove K Digits
Problem Statement
Remove Linked List Elements
Problem Statement
Remove Nth Node From End of List
Problem Statement
Remove Outermost Parentheses
Problem Statement
Remove Sub-Folders from the Filesystem
Problem Statement
Reorder List
Problem Statement
Reorganize String
Problem Statement
Repeated String Match
Problem Statement
Restore IP Addresses
Problem Statement
Reverse Integer
Problem Statement
Reverse Linked List II
Problem Statement
Reverse Nodes in k-Group
Problem Statement
Reverse String
Problem Statement
Reverse Vowels of a String
Problem Statement
Reverse Words in a String
Problem Statement
Reversed Linked List
Problem Statement
Roman to Integer
Problem Statement
Rotate Array
Problem Statement
Rotate Image
Problem Statement
Rotated Digits
Problem Statement
Same Tree
Problem Statement
Search 2D Matrix
Problem Statement
Search 2D Matrix II
Problem Statement
Search in Rotated Sorted Array
Problem Statement
Search in Rotated Sorted Array II
Problem Statement
Second Highest Salary
Problem Statement
Serialize and Deserialize Binary Tree
Problem Statement
Serialize and Deserialize BST
Problem Statement
Set Matrix Zeroes
Problem Statement
Shifting Letters
Problem Statement
Shortest Bridge
Problem Statement
Shortest Palindrome
Problem Statement
Shortest Path in Binary Matrix
Problem Statement
Shortest Subarray with Sum at Least K
Problem Statement
Shuffle an Array
Problem Statement
Shuffle String
Problem Statement
Similar String Groups
Problem Statement
Simplify Path
Problem Statement
Single Element in a Sorted Array
Problem Statement
Single Number
Problem Statement
Single Number II
Problem Statement
Single Number III
Problem Statement
Sliding Puzzle
Problem Statement
Sliding Window Maximum
Problem Statement
Sliding Window Median
Problem Statement
Smallest Range Covering Elements from K Lists
Problem Statement
Smallest Subtree with all the Deepest Nodes
Problem Statement
Snapshot Array
Problem Statement
Sort Array By Parity
Problem Statement
Sort Characters By Frequency
Problem Statement
Sort Colors
Problem Statement
Sort List
Problem Statement
Spiral Matrix
Problem Statement
Spiral Matrix II
Problem Statement
Spiral Matrix II
Problem Statement
Split Array Largest Sum
Problem Statement
Sqrt(x)
Problem Statement
Squares of a Sorted Array
Problem Statement
Stamping The Sequence
Problem Statement
Stickers to Spell Word
Problem Statement
Stream of Characters
Problem Statement
String Compression
Problem Statement
String to Integer (atoi)
Problem Statement
Subarray Sum Equals K
Problem Statement
Subsets
Problem Statement
Subsets II
Problem Statement
Substring with Concatenation of All Words
Problem Statement
Subtree of Another Tree
Problem Statement
Sudoku Solver
Problem Statement
Sum of Left Leaves
Problem Statement
Sum of Two Integers
Problem Statement
Sum Root to Leaf Numbers
Problem Statement
Summary Ranges
Problem Statement
Super Egg Drop
Problem Statement
Surrounded Regions
Problem Statement
Swap Nodes in Pairs
Problem Statement
Swim in Rising Water
Problem Statement
Symmetric Tree
Problem Statement
Target Sum
Problem Statement
Task Scheduler
Problem Statement
Text Justification
Problem Statement
The Skyline Problem
Problem Statement
Third Maximum Number
Problem Statement
Time Based Key-Value Store
Problem Statement
Toeplitz Matrix
Problem Statement
Top K Frequent Elements
Problem Statement
Top K Frequent Words
Problem Statement
Total Hamming Distance
Problem Statement
Trapping Rainwater
Problem Statement
Trim a Binary Search Tree
Problem Statement
Two sum
Problem Statement
Two Sum II - Input Array Is Sorted
Problem Statement
Two Sum IV - Input is a BST
Problem Statement
Uncommon Words from Two Sentences
Problem Statement
Unique Binary Search Trees
Problem Statement
Unique Binary Search Trees II
Problem Statement
Unique Paths
Problem Statement
Unique Paths II
Problem Statement
UTF-8 Validation
Problem Statement
Valid Anagram
Problem Statement
Valid Number
Problem Statement
Valid Palindrome
Problem Statement
Valid Palindrome II
Problem Statement
Valid Parentheses
Problem Statement
Valid Parenthesis String
Problem Statement
Valid Parenthesis String
Problem Statement
Valid Sudoku
Problem Statement
Valid Tic-Tac-Toe State
Problem Statement
Valid Triangle Number
Problem Statement
Validate Binary Search Tree
Problem Statement
Validate Binary Tree Nodes
Problem Statement
Validate IP Address
Problem Statement
Verifying an Alien Dictionary
Problem Statement
Vertical Order Traversal of a Binary Tree
Problem Statement
Vowel Spellchecker
Problem Statement
Wiggle Sort II
Problem Statement
Wiggle Subsequence
Problem Statement
Wildcard Matching
Problem Statement
Wildcard Matching
Problem Statement
Word Break
Problem Statement
Word Break II
Problem Statement
Word Ladder
Problem Statement
Word Ladder II
Problem Statement
Word Pattern
Problem Statement
Word Search
Problem Statement
Word Search
Problem Statement
Word Subsets
Problem Statement
Zigzag Conversion
Problem Statement