LeetCode

LeetCode Algorithm

#	Title	Solution	Difficulty
1	Two Sum	C	Easy
2	Add Two Numbers	C	Medium
3	Longest Substring Without Repeating Characters	C	Medium
4	Median of Two Sorted Arrays	C	Hard
5	Longest Palindromic Substring	C	Medium
6	Zigzag Conversion	C	Medium
7	Reverse Integer	C	Medium
8	String to Integer (atoi)	C	Medium
9	Palindrome Number	C	Easy
10	Regular Expression Matching	C	Hard
11	Container With Most Water	C	Medium
12	Integer to Roman	C	Medium
13	Roman to Integer	C	Easy
14	Longest Common Prefix	C	Easy
16	3Sum Closest	C	Medium
17	Letter Combinations of a Phone Number	C	Medium
19	Remove Nth Node From End of List	C	Medium
20	Valid Parentheses	C	Easy
21	Merge Two Sorted Lists	C	Easy
24	Swap Nodes in Pairs	C	Medium
26	Remove Duplicates from Sorted Array	C	Easy
27	Remove Element	C	Easy
28	Find the Index of the First Occurrence in a String	C	Easy
29	Divide Two Integers	C	Medium
32	Longest Valid Parentheses	C	Hard
35	Search Insert Position	C	Easy
37	Sudoku Solver	C	Hard
38	Count and Say	C	Medium
42	Trapping Rain Water	C	Hard
45	Jump Game II	C	Medium
50	Pow(x, n)	C	Medium
53	Maximum Subarray	C	Medium
62	Unique Paths	C	Medium
63	Unique Paths II	C	Medium
66	Plus One	C	Easy
75	Sort Colors	C	Medium
79	Word Search	C	Medium
82	Remove Duplicates from Sorted List II	C	Medium
83	Remove Duplicates from Sorted List	C	Easy
94	Binary Tree Inorder Traversal	C	Easy
98	Validate Binary Search Tree	C	Medium
101	Symmetric Tree	C	Easy
104	Maximum Depth of Binary Tree	C	Easy
108	Convert Sorted Array to Binary Search Tree	C	Easy
109	Convert Sorted List to Binary Search Tree	C	Medium
110	Balanced Binary Tree	C	Easy
112	Path Sum	C	Easy
118	Pascal's Triangle	C	Easy
119	Pascal's Triangle II	C	Easy
121	Best Time to Buy and Sell Stock	C	Easy
124	Binary Tree Maximum Path Sum	C	Hard
125	Valid Palindrome	C	Easy
136	Single Number	C	Easy
141	Linked List Cycle	C	Easy
142	Linked List Cycle II	C	Medium
153	Find Minimum in Rotated Sorted Array	C	Medium
160	Intersection of Two Linked Lists	C	Easy
169	Majority Element	C	Easy
173	Binary Search Tree Iterator	C	Medium
189	Rotate Array	C	Medium
190	Reverse Bits	C	Easy
191	Number of 1 Bits	C	Easy
201	Bitwise AND of Numbers Range	C	Medium
203	Remove Linked List Elements	C	Easy
206	Reverse Linked List	C	Easy
215	Kth Largest Element in an Array	C	Medium
217	Contains Duplicate	C	Easy
223	Rectangle Area	C	Medium
226	Invert Binary Tree	C	Easy
230	Kth Smallest Element in a BST	C	Medium
231	Power of Two	C	Easy
234	Palindrome Linked List	C	Easy
236	Lowest Common Ancestor of a Binary Tree	C	Medium
242	Valid Anagram	C	Easy
268	Missing Number	C	Easy
274	H-Index	C	Medium
278	First Bad Version	C	Easy
283	Move Zeroes	C	Easy
287	Find the Duplicate Number	C	Medium
344	Reverse String	C	Easy
367	Valid Perfect Square	C	Easy
387	First Unique Character in a String	C	Easy
389	Find the Difference	C	Easy
404	Sum of Left Leaves	C	Easy
434	Number of Segments in a String	C	Easy
442	Find All Duplicates in an Array	C	Medium
461	Hamming Distance	C	Easy
476	Number Complement	C	Easy
485	Max Consecutive Ones	C	Easy
509	Fibonacci Number	C	Easy
520	Detect Capital	C	Easy
540	Single Element in a Sorted Array	C	Medium
561	Array Partition	C	Easy
567	Permutation in String	C	Medium
617	Merge Two Binary Trees	C	Easy
647	Palindromic Substrings	C	Medium
669	Trim a Binary Search Tree	C	Medium
674	Longest Continuous Increasing Subsequence	C	Easy
684	Redundant Connection	C	Medium
700	Search in a Binary Search Tree	C	Easy
701	Insert into a Binary Search Tree	C	Medium
704	Binary Search	C	Easy
709	To Lower Case	C	Easy
771	Jewels and Stones	C	Easy
807	Max Increase to Keep City Skyline	C	Medium
841	Keys and Rooms	C	Medium
852	Peak Index in a Mountain Array	C	Medium
876	Middle of the Linked List	C	Easy
901	Online Stock Span	C	Medium
905	Sort Array By Parity	C	Easy
917	Reverse Only Letters	C	Easy
931	Minimum Falling Path Sum	C	Medium
938	Range Sum of BST	C	Easy
953	Verifying an Alien Dictionary	C	Easy
965	Univalued Binary Tree	C	Easy
977	Squares of a Sorted Array	C	Easy
979	Distribute Coins in Binary Tree	C	Medium
985	Sum of Even Numbers After Queries	C	Medium
997	Find the Town Judge	C	Easy
1008	Construct Binary Search Tree from Preorder Traversal	C	Medium
1009	Complement of Base 10 Integer	C	Easy
1019	Next Greater Node In Linked List	C	Medium
1026	Maximum Difference Between Node and Ancestor	C	Medium
1089	Duplicate Zeros	C	Easy
1137	N-th Tribonacci Number	C	Easy
1147	Longest Chunked Palindrome Decomposition	C	Hard
1184	Distance Between Bus Stops	C	Easy
1189	Maximum Number of Balloons	C	Easy
1207	Unique Number of Occurrences	C	Easy
1283	Find the Smallest Divisor Given a Threshold	C	Medium
1524	Number of Sub-arrays With Odd Sum	C	Medium
1653	Minimum Deletions to Make String Balanced	C	Medium
1657	Determine if Two Strings Are Close	C	Medium
1695	Maximum Erasure Value	C	Medium
1704	Determine if String Halves Are Alike	C	Easy
1752	Check if Array Is Sorted and Rotated	C	Easy
1769	Minimum Number of Operations to Move All Balls to Each Box	C	Medium
1833	Maximum Ice Cream Bars	C	Medium
1838	Frequency of the Most Frequent Element	C	Medium
2024	Maximize the Confusion of an Exam	C	Medium
2095	Delete the Middle Node of a Linked List	C	Medium
2125	Number of Laser Beams in a Bank	C	Medium
2130	Maximum Twin Sum of a Linked List	C	Medium
2222	Number of Ways to Select Buildings	C	Medium
2256	Minimum Average Difference	C	Medium
2270	Number of Ways to Split Array	C	Medium
2279	Maximum Bags With Full Capacity of Rocks	C	Medium
2304	Minimum Path Cost in a Grid	C	Medium
2482	Difference Between Ones and Zeros in Row and Column	C	Medium
2501	Longest Square Streak in an Array	C	Medium