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leetcode

LeetCode

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LeetCode Algorithm　

No	Title	Solution	Difficulty
01	Two Sum	java	Easy
02	Add Two Numbers	java	Medium
03	Longest Substring Without Repeating Characters	java	Medium
05	Longest Palindromic Substring	java	Medium
06	ZigZag Conversion	java	Medium
07	Reverse Integer	java	Easy
08	String to Integer (atoi)	java	Medium
09	Palindrome Number	java	Easy
10	Regular Expression Matching	java	Hard
11	Container With Most Water	java	Medium
12	Integer to Roman	java	Medium
13	Roman to Integer	java	Easy
14	Longest Common Prefix	java	Easy
15	3Sum	java	Medium
16	3Sum-closest	java	Medium
17	Letter Combinations of a Phone Number	java	Medium
18	4Sum	java	Medium
19	Remove Nth Node From End of List	java	Medium
20	Valid Parentheses	java	Easy
21	Merge Two Sorted Lists	java	Easy
22	Generate Parentheses	java	Medium
23	Merge k Sorted Lists	java	Hard
24	Swap Nodes in Pairs	java	Medium
25	Reverse Nodes in k-Group	java	Hard
26	Remove Duplicates from Sorted Array	java	Easy
27	Remove Element	java	Easy
28	Implement strStr()	java	Easy
29	Divide Two Integers	java	Medium
30	Substring with Concatenation of All Words	java	Hard
31	Next Permutation	java	Medium
32	Longest Valid Parentheses	java	Hard
33	Search in Rotated Sorted Array	java	Medium
34	Find First and Last Position of Element in Sorted Array	java	Medium
35	Search Insert Position	java	Easy
38	Count and Say	java	Easy
39	Combination Sum	java	Medium
40	Combination Sum II	java	Medium
42	Trapping Rain Water	java	Hard
46	Permutations	java	Medium
47	Permutations II	java	Medium
49	Group Anagrams	java	Medium
50	Pow(x, n)	java	Medium
51	N-Queens	java	Hard
52	N-Queens II	java	Hard
53	Maximum Subarray	java	Easy
54	Spiral Matrix	java	Medium
55	Jump Game	java	Medium
56	Merge Intervals	java	Medium
57	Insert Interval	java	Hard
58	Length of Last Word	java	Easy
59	Spiral Matrix II	java	Medium
60	Permutation Sequence	java	Medium
61	Rotate List	java	Medium
62	Unique Paths	java	Medium
63	Unique Paths II	java	Medium
64	Minimum Path Sum	java	Medium
65	Valid Number	java	Hard
66	Plus One	java	Easy
67	Add Binary	java	Easy
69	Sqrt(x)	java	Easy
70	Climbing Stairs	java	Easy
72	Edit Distance	java	Hard
73	Set Matrix Zeroes	java	Medium
74	Search a 2d Matrix	java	Medium
75	Sort Colors	java	Medium
76	Minimum Window Substring	java	Hard
77	Combinations	java	Medium
78	Subsets	java	Medium
79	Word Search	java	Medium
80	Remove Duplicates from Sorted Array II	java	Medium
81	Search in Rotated Sorted Array II	java	Medium
82	Remove Duplicates from Sorted List II	java	Medium
83	Remove Duplicates from Sorted List	java	Easy
84	Largest Rectangle in Histogram	java	Hard
86	Partition List	java	Medium
87	Scramble String	java	Hard
88	Merge Sorted Array	java	Easy
89	Gray Code	java	Medium
90	Subsets II	java	Medium
91	Decode Ways	java	Medium
92	Reverse Linked List II	java	Medium
93	Restore IP Addresses	java	Medium
94	Binary Tree Inorder Traversal	java	Medium
95	Unique Binary Search Trees II	java	Medium
97	Interleaving String	java	Hard
98	Validate Binary Search Tree	java	Medium
99	Recover Binary Search Tree	java	Hard
100	Same Tree	java	Easy
101	Symmetric Tree	java	Easy
102	Binary Tree Level Order Traversal	java	Medium
104	Maximum Depth of Binary Tree	java	Easy
105	Construct Binary Tree from Preorder and Inorder Traversal	java	Medium
107	Binary Tree Level Order Traversal II	java	Easy
110	Balanced Binary Tree	java	Easy
111	Minimum Depth of Binary Tree	java	Easy
112	Path Sum	java	Easy
113	Path Sum II	java	Medium
114	Flatten Binary Tree to Linked List	java	Medium
116	Populating Next Right Pointers in Each Node	java	Medium
117	Populating Next Right Pointers in Each Node II	java	Medium
118	Pascal's Triangle	java	Easy
119	Pascal's Triangle II	java	Easy
120	Triangle	java	Medium
121	Best Time to Buy and Sell Stock	java	Easy
122	Best Time to Buy and Sell Stock II	java	Easy
124	Binary Tree Maximum Path Sum	java	Hard
125	Valid Palindrome	java	Easy
127	Word Ladder	java	Hard
128	Longest Consecutive Sequence	java	Hard
129	Sum Root to Leaf Numbers	java	Medium
131	Palindrome Partitioning	java	Medium
132	Palindrome Partitioning II	java	Hard
133	Clone Graph	java	Medium
134	Gas Station	java	Medium
136	Single Number	java	Easy
137	Single Number II	java	Medium
141	Linked List Cycle	java	Easy
142	Linked List Cycle II	java	Medium
143	Reorder List	java	Medium
144	Binary Tree Preorder Traversal	java	Medium
145	Binary Tree Postorder Traversal	java	Hard
146	LRU Cache	java	Medium
147	Insertion Sort List	java	Medium
148	Sort List	java	Medium
150	Evaluate Reverse Polish Notation	java	Medium
151	Reverse Words in a String	java	Medium
152	Maximum Product Subarray	java	Medium
153	Find Minimum in Rotated Sorted Array	java	Medium
154	Find Minimum in Rotated Sorted Array II	java	Hard
155	Min Stack	java	Easy
160	Intersection of Two Linked Lists	java	Easy
162	Find Peak Element	java	Medium
165	Compare Version Numbers	java	Medium
167	Two Sum II - Input array is sorted	java	Easy
168	Excel Sheet Column Title	java	Easy
169	Majority Element	java	Easy
171	Excel Sheet Column Number	java	Easy
172	Factorial Trailing Zeroes	java	Easy
173	Binary Search Tree Iterator	java	Medium
174	Dungeon Game	java	Hard
179	Largest Number	java	Medium
187	Repeated DNA Sequences	java	Medium
188	Best Time to Buy and Sell Stock IV	java	Hard
189	Rotate Array	java	Easy
190	Reverse Bits	java	Easy
191	Number of 1 Bits	java	Easy
198	House Robber	java	Easy
199	Binary Tree Right Side View	java	Medium
200	Number of Islands	java	Medium
201	Bitwise AND of Numbers Range	java	Medium
202	Happy Number	java	Easy
203	Remove Linked List Elements	java	Easy
204	Count Primes	java	Easy
205	Isomorphic Strings	java	Easy
206	Reverse Linked List	java	Easy
208	Implement Trie (Prefix Tree)	java	Medium
209	Minimum Size Subarray Sum	java	Medium
213	House Robber II	java	Medium
215	Kth Largest Element in an Array	java	Medium
216	Combination Sum III	java	Medium
217	Contains Duplicate	java	Easy
219	Contains Duplicate II	java	Easy
220	Contains Duplicate III	java	Medium
221	Maximal Square	java	Medium
225	Implement Stack using Queues	java	Easy
226	Invert Binary Tree	java	Easy
231	Power of Two	java	Easy
234	Palindrome Linked List	java	Easy
235	Lowest Common Ancestor of a Binary Search Tree	java	Easy
236	Lowest Common Ancestor of a Binary Search Tree II	java	Medium
237	Delete Node in a Linked List	java	Easy
238	Product of Array Except Self	java	Medium
239	Sliding Window Maximum	java	Hard
242	Valid Anagram	java	Easy
257	Binary Tree Paths	java	Easy
258	Add Digits	java	Easy
260	Single Number III	java	Medium
263	Ugly Number	java	Easy
264	Ugly Number II	java	Medium
268	Missing Number	java	Easy
279	Perfect Squares	java	Medium
283	Move Zeroes	java	Easy
287	Find the Duplicate Number	java	Medium
290	Word Pattern	java	Easy
312	Burst Balloons	java	Hard
313	Super Ugly Number	java	Medium
316	Remove Duplicate Letters	java	Hard
322	Coin Change	java	Medium
328	Odd Even Linked List	java	Medium
334	Increasing Triplet Subsequence	java	Medium
338	Counting Bits	java	Medium
342	Power of Four	java	Easy
343	Integer Break	java	Medium
344	Reverse String	java	Easy
345	Reverse Vowels of a String	java	Easy
347	Top K Frequent Elements	java	Medium
349	Intersection of Two Arrays	java	Easy
350	Intersection of Two Arrays II	java	Easy
354	Russian Doll Envelopes	java	Hard
355	Design Twitter	java	Medium
365	Water and Jug Problem	java	Medium
371	Sum of Two Integers	java	Easy
372	Super Pow	java	Medium
374	Guess Number Higher or Lower	java	Easy
377	Combination Sum IV	java	Medium
380	Insert Delete GetRandom O(1)	java	Medium
384	Shuffle an Array	java	Medium
386	Lexicographical Numbers	java	Medium
387	First Unique Character in a String	java	Easy
390	Elimination Game	java	Medium
397	Integer Replacement	java	Medium
398	Random Pick Index	java	Medium
400	Nth Digit	java	Medium
401	Binary Watch	java	Easy
404	Sum of Left Leaves	java	Easy
405	Convert a Number to Hexadecimal	java	Easy
406	Queue Reconstruction by Height	java	Medium
409	Longest Palindrome	java	Easy
414	Third Maximum Number	java	Easy
415	Add Strings	java	Easy
416	Partition Equal Subset Sum	java	Medium
434	Number of Segments in a String	java	Easy
435	Non-overlapping Intervals	java	Medium
441	Arranging Coins	java	Easy
442	Find All Duplicates in an Array	java	Medium
443	String Compression	java	Medium
447	Number of Boomerangs	java	Easy
448	Find All Numbers Disappeared in an Array	java	Easy
453	Minimum Moves to Equal Array Elements	java	Easy
454	4Sum II	java	Medium
459	Repeated Substring Pattern	java	Easy
461	Hamming Distance	java	Easy
462	Minimum Moves to Equal Array Elements II	java	Medium
485	Max Consecutive Ones	java	Easy
491	Increasing Subsequences	java	Medium
494	Target Sum	java	Easy
496	Next Greater Element I	java	Easy
500	Keyboard Row	java	Medium
506	Relative Ranks	java	Easy
509	Fibonacci Number	java	Easy
518	Coin Change 2	java	Medium
520	Detect Capital	java	Easy
532	K-diff Pairs in an Array	java	Easy
543	Diameter of Binary Tree	java	Easy
556	Next Greater Element III	java	Medium
560	Subarray Sum Equals K	java	Medium
561	Array Partition I	java	Easy
567	Permutation in String	java	Medium
575	Distribute Candies	java	Easy
589	N-ary Tree Preorder Traversal	java	Easy
590	N-ary Tree Postorder Traversal	java	Easy
593	Valid Square	java	Medium
594	Longest Harmonious Subsequence	java	Easy
599	Minimum Index Sum of Two Lists	java	Medium
611	Valid Triangle Number	java	Medium
637	Average of Levels in Binary Tree	java	Easy
643	Maximum Average Subarray I	java	Easy
645	Set Mismatch	java	Easy
650	2 Keys Keyboard	java	Medium
654	Maximum Binary Tree	java	Medium
657	Robot Return to Origin	java	Easy
680	Valid Palindrome II	java	Easy
692	Top K Frequent Words	java	Medium
696	Count Binary Substrings	java	Easy
698	Partition to K Equal Sum Subsets	java	Medium
709	To Lower Case	java	Easy
713	Subarray Product Less Than K	java	Medium
718	Maximum Length of Repeated Subarray	java	Medium
724	Find Pivot Index	java	Easy
740	Delete and Earn	java	Medium
767	Reorganize String	java	Medium
771	Jewels and Stones	java	Easy
788	Rotated Digits	java	Easy
795	Number of Subarrays with Bounded Maximum	java	Medium
804	Unique Morse Code Words	java	Easy
819	Most Common Word	java	Easy
821	Shortest Distance to a Character	java	Easy
824	Goat Latin	java	Easy
841	Keys and Rooms	java	Medium
860	Lemonade Change	java	Easy
866	Prime Palindrome	java	Medium
877	Stone Game	java	Medium
896	Monotonic Array	java	Easy
898	Bitwise ORs of Subarrays	java	Medium
908	Smallest Range I	java	Easy
994	Rotting Oranges	java	Easy
1011	Capacity To Ship Packages Within D Days	java	Medium
1012	Numbers With Repeated Digits	java	Hard
1015	Smallest Integer Divisible by K	java	Medium
1018	Binary Prefix Divisible By 5	java	Easy
1019	Next Greater Node In Linked List	java	Medium
1027	Longest Arithmetic Subsequence	java	Medium
1029	Two City Scheduling	java	Medium
1046	Last Stone Weight	java	Easy
1089	Duplicate Zeros	java	Easy
1103	Distribute Candies to People	java	Easy
1115	Print FooBar Alternately	java	Medium
1117	Building H2O	java	Medium
1122	Relative Sort Array	java	Easy
1143	Longest Common Subsequence	java	Medium
1201	Ugly Number III	java	Medium
1222	Queens That Can Attack the King	java	Medium
1250	Check If It Is a Good Array	java	Hard
1325	Delete Leaves With a Given Value	java	Medium
1338	Reduce Array Size to The Half	java	Medium

剑指Offer

No	Title	Solution	Difficulty
03	数组中重复的数字	java	Easy
04	二维数组中的查找	java	Easy
05	替换空格	java	Easy
06	从尾到头打印链表	java	Easy
09	用两个栈实现队列	java	Easy
10	青蛙跳台阶问题	java	Easy
11	旋转数组的最小数字	java	Easy
12	矩阵中的路径	java	Medium
13	机器人的运动范围	java	Medium
14	剪绳子	java	Medium
14-2	剪绳子 II	java	Medium
15	二进制中1的个数	java	Easy
17	打印从1到最大的n位数	java	Easy
18	删除链表的节点	java	Easy
20	表示数值的字符串	java	Medium
21	调整数组顺序使奇数位于偶数前面	java	Easy
22	链表中倒数第k个节点	java	Easy
24	反转链表	java	Easy
39	数组中出现次数超过一半的数字	java	Easy
40	最小的k个数	java	Easy
46	把数字翻译成字符串	java	Medium
47	礼物的最大价值	java	Medium
50	第一个只出现一次的字符	java	Easy
53	0～n-1中缺失的数字	java	Easy
58-2	左旋转字符串	java	Easy
59-1	滑动窗口的最大值	java	Easy
60	n个骰子的点数	java	Easy
64	求1+2+…+n	java	Medium
65	不用加减乘除做加法	java	Easy
66	构建乘积数组	java	Medium

面试题

|　02.06 |　　　回文链表 | 　　java|　Easy | |　05.01 |　　　插入 | 　　java|　Easy | |　08.06 |　　　汉诺塔问题 | 　　java|　Easy | |　16.05 |　　　阶乘尾数 | 　　java|　Easy | |　16.07 |　　　最大数值 | 　　java|　Easy | |　16.11 |　　　跳水板 | 　　java|　Easy | |　16.17 |　　　连续数列 | 　　java|　Easy |

LCP

No	Title	Solution	Difficulty
02	分式化简	java	Easy
09	最小跳跃次数	java	Hard