leetcode分类总结
Introduction
1.
求和问题2sum, 3sum, k sum...
1.1.
Two Sum (sorted)
1.2.
Two Sum Data Structure
1.3.
3 sum
1.4.
3 sum closest
1.5.
3 sum smaller
1.6.
4 sum
2.
Math
2.1.
Math Without Operator
2.1.1.
Divide Two Integers
2.1.2.
Multiply Two Integers
2.1.3.
Add Two Integers
2.1.4.
A Minus B
2.2.
Ugly Number
2.3.
Ugly Number II
2.4.
Add Digits
2.5.
Add Binary
2.6.
Trailing Zeroes
2.7.
Max Points on a Line
2.8.
Palindrome Number
2.9.
AtoI
2.10.
Count Primes
2.11.
Reverse Integer
2.12.
Roman to Integer
2.13.
Integer to Roman
2.14.
Multiply Strings
2.15.
Rectangle Area
2.16.
Perfect Square
2.17.
Valid Number(hard)
2.18.
其他进制数字
2.18.1.
Excel sheet Column Number
2.18.2.
Excel Sheet Column Title
3.
Bit Manipulation
3.1.
XOR
3.1.1.
Single Number
3.1.2.
Single Number II
3.1.3.
Single Number III
3.1.4.
Single Number IV
3.1.5.
Missing Number
3.2.
&操作
3.2.1.
Number of 1 bits
3.2.2.
Power of Two
3.3.
Shift
3.3.1.
Reverse Bits
3.4.
Math
3.4.1.
Repeated DNA Sequence
3.4.2.
Bitwise AND of Number RANGE
4.
linked list
4.1.
Add two numbers
4.2.
Remove Duplicates
4.3.
Remove Duplicates II
4.4.
Merge
4.4.1.
Merge Two Sorted List
4.4.2.
Merge K Sorted List
4.5.
two pointer
4.5.1.
List Cycle
4.5.2.
List Cycle II
4.5.3.
Remove Nth node from the end
4.5.4.
Partition List
4.6.
Reverse
4.6.1.
Reverse List
4.6.2.
Reverse List II
4.6.3.
Reverse Nodes in K Group
4.6.4.
Palindrome List
4.6.5.
Swap nodes in pairs
4.6.6.
Reorder List
4.7.
Rotate List
4.8.
Copy List with Random Pointer
4.9.
Convert Sorted List to BST
4.10.
Intersection of 2 Lists
5.
greedy
5.1.
Jump Game
5.2.
Jump Game II
5.3.
Gas Station
5.4.
Candy
5.5.
Product of Array except self
6.
Binary Tree
6.1.
Traversal
6.1.1.
Pre-order
6.1.2.
In-order
6.1.3.
Post-order
6.1.4.
Level-Order
6.1.5.
Level-Order 2
6.1.6.
ZigZag
6.2.
Recursion
6.2.1.
Binary Tree Max Depth
6.2.2.
Binary Tree Min Depth
6.2.3.
Balanced Binary Tree
6.2.4.
Symmetric Binary Tree
6.2.5.
Valid Binary Search Tree
6.2.6.
Flatten Binary Tree to Linked list
6.2.7.
Lowest Common Ancestor in Binary Tree
6.2.8.
Binary Tree Longest Consecutive Sequence
6.2.9.
Recover Binary Tree
6.3.
Count Complete Tree Nodes
6.4.
Binary Tree Max Path Sum
6.5.
Construct binary tree from inorder and preorder
6.6.
Construct binary tree from inorder and postorder
6.7.
Unique Binary Search Tree
6.8.
Unique Binary Search Tree II
7.
Tree
7.1.
树的遍历
8.
BFS
8.1.
Binary Tree Right Side View
8.2.
Populate next right pointer
8.3.
Populate next right pointer II
8.4.
Word ladder
8.5.
Word Ladder II
9.
DFS
9.1.
Path Sum
9.2.
Path Sum II
9.3.
Sum Root to leaf numbers
9.4.
Word Break II
10.
Graph
10.1.
Copy Graph
11.
Binary Search
11.1.
四种基本类型
11.2.
第一类
11.3.
第二类
11.4.
第三类
11.5.
第四类
11.6.
find kth(重点)
11.7.
Longest Increasing Subsequence
11.8.
Smallest Rectangle Enclosing Black Pixels
12.
Sort
12.1.
非基于比较的排序
12.2.
Wiggle Sort
12.3.
Sort Colors
12.4.
Sort List
12.5.
Insertion Sort List
12.6.
Maximum Gap
12.7.
Meeting Point
12.8.
Comparator
12.8.1.
Meeting Rooms
12.8.2.
Meetings Rooms II
12.8.3.
Insert Intervals
12.8.4.
Merge Intervals
12.8.5.
Largest Number
12.9.
Bucket Sort
12.9.1.
First Missing Positive
13.
Sorted Matrix
14.
Dynamic Programming
14.1.
一维DP
14.1.1.
Triangle
14.1.2.
Pascal Triangle
14.1.3.
Pascal Triangle
14.1.4.
House Robber
14.1.5.
House Robber II
14.1.6.
Best time to buy and sell stock I, II, III, IV
14.1.7.
Stock with cooldown
14.1.8.
Word Break
14.2.
二维DP
14.2.1.
dungeon game
14.2.2.
Max Rectangle
14.2.3.
Pascal Triangle
14.2.4.
Pascal Triangle II
14.2.5.
Max Square
14.2.6.
Edit Distance
14.3.
Hard problems
14.3.1.
Regular Expression Matching
14.3.2.
Wildcard Matching
15.
Array
15.1.
Find Two Repeating Elements
15.2.
Find Duplicates
15.3.
Move Zeroes
15.4.
Remove Element
15.5.
Spiral Matrix
15.6.
Spiral Matrix II
15.7.
Remove duplicates in sorted array
15.8.
Remove duplicates in sorted array II
15.9.
Longest Consecutive Sequence
15.10.
One Edit Distance
15.11.
Majority
15.11.1.
Majority Number
15.11.2.
Majority Number II
15.11.3.
Majority Number III
15.12.
Subarray
15.12.1.
Maximum Subarray Sum
15.12.2.
Maximum Subarray Product
15.12.3.
Product of Array except itself
16.
Back Tracking
16.1.
Subset and Permutation
16.1.1.
[类型1]
16.1.1.1.
Subsets
16.1.1.2.
Subsets II
16.1.1.3.
Permutations
16.1.1.4.
Permutations II
16.1.1.5.
Combinations
16.1.1.6.
Combinations Sum
16.1.1.7.
Combinations Sum II
16.1.1.8.
Combinations Sum III
16.1.1.9.
Letter Combination of Phone Number
16.1.1.10.
Generate Parentheses
16.1.2.
[类型2]
16.1.2.1.
next Permutation
16.1.2.2.
PermutationSequence
16.1.2.3.
Permutation Index
16.1.2.4.
Permutation Index II
16.2.
Sudoku
16.2.1.
Valid Sudoku
16.2.2.
Sudoku Solver
16.3.
flip game
16.4.
flip game II
16.5.
nim game
16.6.
N Queen
16.7.
Palindrome Partitioning
16.8.
Palindrome Partitioning II
16.9.
Palindrome Permutation
16.10.
Palindrome Permutation II
16.11.
Additive Number
17.
Two Pointer
17.1.
Minimum Size Subarray Sum
17.2.
Valid Palindrome
17.3.
Container with most water
17.4.
Trapping Water
17.5.
Rotate List
18.
Divide and Conquer
18.1.
Kth Largest Element
19.
Quick Select
19.1.
Find kth largest Element
19.2.
Sort Colors
19.3.
Sort Colors II
20.
Hash Table
20.1.
Array
20.1.1.
Contains Duplicate
20.1.2.
Contains Duplicate 2
20.1.3.
Contains Duplicate 3
20.1.4.
Shortest Word Distance
20.1.5.
Shortest Word Distance 2
20.1.6.
Shortest Word Distance 3
20.2.
Number
20.2.1.
Happy Number
20.3.
String
20.3.1.
Longest Substring without repeat characters
20.3.2.
Longest Substring with at most k Distinct Characters
20.3.3.
Minimum Window Substring
20.3.4.
Substring with Concatenation of All Words
20.3.5.
Palindrom Permutation
20.3.6.
Group shift Number
20.3.7.
Unique Abbreviation
21.
Stack
21.1.
Implement stack with queue
21.2.
Implement queue with stack
21.3.
Min Stack
21.4.
String
21.4.1.
Valid Parenthesis
21.4.2.
Evaluate Reverse Polish Notation
21.4.3.
Largest Rectangel in Histrogram
21.4.4.
Maximal Rectangle
21.4.5.
Simplify Path
21.5.
Reverse polish notation
22.
Heap
22.1.
Closest Binary Search Tree Value
22.2.
Sliding Window Maximum
23.
String
23.1.
Count and Say
23.2.
Zigzag Conversion
23.3.
Length of Last word
23.4.
Compare Version Number
23.5.
Reverse Words in a String
23.6.
Reverse Words in a String II
23.7.
Palindrome
23.7.1.
Longest Palindromic Substring
23.7.2.
Shortest Palindrome
23.8.
Anagram
23.9.
Group Anagram
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leetcode分类总结
Contains Duplicate
题目描述
解题方法
直接hashtable解决
Solution
Reference