lianxi
Introduction
Database
delete dup email
Department Highest Salary
Employees Earning More Than Their Managers
Languages
C
C++
Java
mergesort
ArrayList vs List init
Array vs ArrayList
quicksort
Inversion of Control vs Dependency Injection
Restrictions on Generic
13.1 Private Constructor: In terms of inheritance, what is the effect of keeping a constructor private?
13.2 Return from Finally
13.3 Final, etc.
13.4 Genericsvs.Templates
13.5 TreeMap,HashMap,LinkedHashMap
13.6 Object Reflection
13.7 Lambda Expressions
13.8 Lambda Random
comparator
hashcode and equals override
Js
Closure
Python
self
yield
Knowledge Base
front-end and back-end validation
External sorting
RBT
URL,URI,URN
Union-find
what happens when you type in a URL in browser
Regex
RPC vs REST
put vs post
CC189
1.1 Is Unique
1.2 Check Permutation
1.3 URLify
1.4 Palindrome Permutation
1.5 One Away
1.6 String Compression
1.7 Rotate Matrix
1.8 Zero Matrix
1.9 String Rotation
2.1 Remove Dups
2.2 Return Kth to Last
2.3 Delete Middle Node
2.4 Partition
2.5 Sum Lists
2.6 Palindrome
2.7 Intersection
2.8 Loop Detection
3.1 Three in One
3.2 Stack Min
3.3 Stack of Plates
3.4 Queue via Stacks
3.5 Sort Stack
3.6 Animal Shelter
4.1 Route Between Nodes
4.2 Minimal Tree
4.3 List of Depths
4.4 Check Balanced
4.5 Validate BST
4.6 Successor
4.7 Build Order
4.8 First Common Ancestor
4.9 BST Sequences
4.10 Check Subtree
4.11 Random Node
4.12 Paths with Sum
5.1 Insertion
5.2 Binary to String
5.3 Flip Bit to Win
5.4 Next Number
5.5 Debugger
5.6 Conversion
5.7 Pairwise Swap
5.8 Draw Line
8.1 Triple Step
8.2 Robot in a Grid
8.3 Magin Index
8.4 Power Set
8.5 Recursive Multiply
8.6 Towers of Hanoi
8.7 Permutations without Dups
8.8 Permutations with Duplicates
8.9 Parens
8.10 Paint FIll
8.11 Coins
8.12 Eight Queens
8.13 Stack of Boxes
8.14 Boolean Evaluation
10.1 Sorted Merge
10.2 Group Anagrams
10.3 Search in Rotated Array
10.4 Sorted Search, No Size
10.5 Sparse Seach
10.6 Sort Big File
10.7 Missing int
10.8 Find Duplicates
10.9 Sorted Matrix Search
10.10 Rank from Stream
10.11 Peaks and Valleys
16.1 Number Swapper
16.2 Word Frequencies
16.3 Intersection
16.4 Tic Tac Win
16.5 Factorial Zeros
16.10 Living People
16.12 XML Encoding
16.22 Langton's Ant
17.26 Sparse Similarity
OS
Deadlock vs Livelock
System Design
Tiny URL
Twitter
Scalability
Knowledge Base
front-end and back-end validation
RBT
URL,URI,URN
what happens when you type in a URL in browser
Regex
Array
Find the Duplicate Number
Plus One
Two Sum
3Sum
Move Zeros
Print n prime
Rearrange array in alternating positive & negative items with O1 extra space
Insert Delete GetRandom O1
Product of Array Except Self
Intersection of two array
Intersection of two array II
Merge intervals
Insert Intervals
Game of Life
Meeting Rooms
Meeting Room II
Merge sorted array
Missing Number
Rotate Array
Find Median from Data Stream
Sort Colors
Container With Most Water
Remove Duplicates from Sorted Array
Remove Duplicates from Sorted Array II
Minimum Size Subarray Sum
Pascals Triangle
Pascal Triangle II
Contains Duplicate
Contains Duplicate II
Contains Duplicate III
4Sum
4Sum II
3Sum Closest
Number of Boomerangs
Max Points on a Line
Median of Two Sorted Arrays
Sliding Window Median
Task Scheduler
Partition Array
Missing Ranges
Minimum Window Substring
Container With Most Water
Longest Consecutive Sequence
Summary Ranges
Next Greater Element I
Remove Element
Maximum XOR of Two Numbers in an Array
Find the maximum repeating number in O(n) time and O(1) extra space
Binary Search
First Bad Version
Sqrt(x)
Search for a Range
Search Insert Position
Brain Teasers
Red Marbles, Blue Marbles
Random 5 to Random 7
Drop eggs
Design
Design Tic Tac Toc
Implement Trie (Prefix Tree)
Moving Average from Data Stream
Backtracking
Next Permutation
Permutation
Permutation II
Permutation Sequence
Combinations
Combination Sum
Combination Sum II
Combination Sum III
Subsets
Subsets II
Letter Combinations of a Phone Number
Binary Watch
Word Search
Word Search II
Surrounded Regions
Pacific Atlantic Water Flow
N-Queens
N-Queens II
Sudoku Solver
Generate Parehtheses
DP
Candy
longest valid parentheses
Word break
Word Break II
Climbing Stairs
Decode Ways
Unique Paths
Unique Paths II
Longest Increasing Subsequence
Jump Game
Jump Game II
Maximum Subarray
Frog Jump
House Robber
House Robber II
House Robber III
Coin Change
Coin Change 2
Nth Fib number
Triangle
Minimum Path Sum
Integer Break
Best time to buy or sell stock
Best Time to Buy and Sell Stock with Cooldown
0-1 Knapsack
Edit Distance
Partition Equal Subset Sum
Combination Sum IV
Ones and Zeroes
Target Sum
Assign Cookies
Wiggle Subsequence
Non-overlapping Intervals
Range Sum Query - Immutable
Range Sum Query 2D - Immutable
Longest Palindromic Subsequence
Paint Fence
Graph
bipartite Graph with BFS
Word Ladder
Clone Graph
Kth Smallest Element in a BST
Battleships in a Board
The skyline Problem
Letter Combinations of a Phone Number
Number of Islands
Number of Islands II
Matching paratheies
Minimum Genetic Mutation
Topological sort
Course Schedule
Course Schedule II
Friend Circles
Number of Connected Components in an Undirected Graph
The Maze
The Maze II
The Maze III
Alien Dictionary
Implement Trie (Prefix Tree)
01 Matrix
Employee Importance
Graph Valid Tree
Find shortest unique prefix for every word in a given list
LL
Reversing linked list iteratively and recursively
LRU
Intersection of Two Linked Lists
Merged two sorted linked lists
Palindrome Linked List
Copy List with Random Pointer
reverse second half of ll
Merge K sorted List
Add two numbers
Reorder List
Linked List Cycle
Linked List Cycle II
Reverse Linked List II
Swap Nodes in Pairs
Matrix
Valid sudoku
Rotate Image
Sparse Matrix Multiplication
rotate matrix
Spiral Matrix
Reverse Integer
Game of Life
Math
Excel Sheet Column Number
Add strings
Factorial Trailing Zeroes
Test fib number
Palindrome Number
Happy Number
Perfect Squares
Basic Calculator
Basic Calculator II
Expression Add Operators
Evaluate Reverse Polish Notation
Different Ways to Add Parentheses
Number Complement
Excel Sheet Column Title
Construct the Rectangle
Stack
Valid Parentheses
matching paratheies
Flatten Nested List Iterator
Min Stack
Basic Calculator
String
Add binary
Find All Anagrams in a String
FizzBuzz
Group Anagrams
Integer to English Words
Reverse C string
Reverse vowel of string
Reverse Words in a String
Strstr
Sum of two large numbers
Sort Characters By Frequency
Isomorphic Strings
One edit distance
Longest Absolute File Path
Valid Anagram
Valid Palindrome
Word Abbreviation
Word Pattern
Valid Word Abbreviation
Longest Common Prefix
Count and Say
Text Justification
Group Shifted Strings
Valid Palindrome II
Decode String
Implement Trie (Prefix Tree)
Simplify Path
UTF-8 Validation
Longest Palindromic Substring
Add and Search Word - Data structure design
Tree
Binary Tree Longest Consecutive Sequence
Binary Tree Longest Consecutive Sequence II
Serialize and Deserialize Binary Tree
BST to DLL
Binary Tree Vertical Order Traversal
Subtree
Same Tree
In-order traversal tree
Populating Next Right Pointers in Each Node
Binary Tree Level Order Travesal
Binary Tree Level Order Traversal II
Binary Tree Longest Consecutive Sequence II
Delete Node in a BST
Lowest Common Ancestor of a Binary Search Tree
Lowest Common Ancestor of a Binary Tree
Closest Binary Search Tree Value
Construct Binary Tree from Preorder and Inorder Traversal
Binary Tree Paths
bst min path sum
Balanced Binary Tree
Validate Binary Search Tree
Binary Tree Right Side View
Binary Tree Zigzag Level Order Traversal
Minimum Depth of Binary Tree
Sum of Left Leaves
Path Sum
Path Sum II
Path Sum III
Kth Smallest Element in a BST
Convert Sorted Array to Binary Search Tree
Diameter of Binary Tree
Maximum Depth of Binary Tree
Symmetric Tree
Inorder Successor in BST
PQ
K closest points
Merge k Sorted Lists
Kth largest element in an Array
Top K Frequent Elements
Queue
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