/LeetCode_Java

LeetCode Java Solution

Primary LanguageJava

Difficulty-难度分类（简单、中等、困难）

难度是根据提交的代码通过率来得出的

Easy

LeetCode NO. Title
1 Two Sum
7 Reverse Integer
9 Palindrome Number
13 Roman to Integer
14 Longest Common Prefix
20 Valid Parentheses
21 Merge Two Sorted Lists
26 Remove Duplicates from Sorted Array
27 Remove Element
28 Implement strStr()
35 Search Insert Position

Medium

LeetCode NO. Title
2 Add Two Numbers
3 Longest Substring Without Repeating Characters
5 Longest Palindromic Substring
6 ZigZag Conversion
8 String to Integer (atoi)
11 Container With Most Water
12 Integer to Roman
15 3Sum
16 3Sum Closest
17 Letter Combinations of a Phone Number
18 4Sum
19 Remove Nth Node From End of List
22 Generate Parentheses
24 Swap Nodes in Pairs
31 Next Permutation
33 Search in Rotated Sorted Array
34 Search for a Range

Hard

LeetCode NO. Title
4 Median of Two Sorted Arrays
23 Merge k Sorted Lists
25 Reverse Nodes in k-Group

Tags-数据结构分类

数据结构是指算法中处理的数据和借助其他数据结构完成算法用到的数据结构

Array

LeetCode NO. Title
1 Two Sum
4 Median of Two Sorted Arrays
11 Container With Most Water
15 3Sum
16 3Sum Closest
18 4Sum
26 Remove Duplicates from Sorted Array
27 Remove Element
31 Next Permutation
33 Search in Rotated Sorted Array
34 Search for a Range
35 Search Insert Position

Dynamic Programming

String

LeetCode NO. Title
3 Longest Substring Without Repeating Characters
5 Longest Palindromic Substring
6 ZigZag Conversion
8 String to Integer (atoi)
12 Integer to Roman
13 Roman to Integer
14 Longest Common Prefix
17 Letter Combinations of a Phone Number
20 Valid Parentheses
22 Generate Parentheses
28 Implement strStr()

Math

LeetCode NO. Title
2 Add Two Numbers
7 Reverse Integer
8 String to Integer (atoi)
9 Palindrome Number
12 Integer to Roman
13 Roman to Integer

Tree

HashTable

LeetCode NO. Title
1 Two Sum
3 Longest Substring Without Repeating Characters
18 4Sum

Depth-first Search

Binary Search

LeetCode NO. Title
4 Median of Two Sorted Arrays
33 Search in Rotated Sorted Array
34 Search for a Range
35 Search Insert Position

Two Pointers

LeetCode NO. Title
3 Longest Substring Without Repeating Characters
11 Container With Most Water
15 3Sum
16 3Sum Closest
18 4Sum
19 Remove Nth Node From End of List
26 Remove Duplicates from Sorted Array
27 Remove Element
28 Implement strStr()

Backtracking

LeetCode NO. Title
17 Letter Combinations of a Phone Number
22 Generate Parentheses

Design

Breadth-first Search

Stack

LeetCode NO. Title
20 Valid Parentheses

Bit Manipulation

Linked List

LeetCode NO. Title
2 Add Two Numbers
19 Remove Nth Node From End of List
21 Merge Two Sorted Lists
23 Merge k Sorted Lists
24 Swap Nodes in Pairs
25 Reverse Nodes in k-Group

Greedy

Heap

LeetCode NO. Title
23 Merge k Sorted Lists

Sort

Divide and Conquer

LeetCode NO. Title
4 Median of Two Sorted Arrays
23 Merge k Sorted Lists

Graph

Trie

Binary Search Tree

Union Find

Segment Tree

Recursion

Binary Indexed Tree

Queue

Topological Sort

Minimax

Brainteaser

Reservoir Sampling

Geometry

Map

Memoization