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Data Structures and Algorithms problems

2021

January

no	monthly	date	source	name	note
1	1	05/01/21	LeetCode	283 move zeros
2	2	06/01/21	LeetCode	268 missing number
3	3	08/01/21	LeetCode	217 contains duplicate
4	4	09/01/21	LeetCode	169 majority element
5	5	10/01/21	LeetCode	121 best time to buy and sell stock
6	6	10/01/21	Hackerrank	FizzBuzz
7	7	10/01/21	Hackerrank	GetMaxValue
8	8	10/01/21	Hackerrank	Divisiblity of strings
9	9	13/01/21	LeetCode	88 Merge Sorted Array	todo
10	10	13/01/21	LeetCode	118 Pascal Triangle
11	11	14/01/21	LeetCode	26 remove duplicates from sorted array
12	12	15/01/21	LeetCode	66 Plus One
13	13	16/01/21	LeetCode	88 Maximum Subarray	todo
14	14	16/01/21	LeetCode	122 best time to buy and sell stock part 2	done
15	15	16/01/21	LeetCode	21 Merge Two Sorted Lists	todo
16	16	23/01/21	LeetCode	141. Linked List Cycle	todo
17	17	25/01/21	LeetCode	160. Intersection of Two Linked Lists	todo
18	18	27/01/21	LeetCode	206. Reverse Linked List	todo

February

no	monthly	date	source	name	note
19	1	01/02/21	LeetCode	234. Palindrome Linked List	todo
20	2	02/02/21	LeetCode	237. Delete Node in a Linked List	todo
21	3	03/02/21	LeetCode	13. Roman to Integer
22	4	04/02/21	LeetCode	14. Longest Common Prefix	study binary search solution
23	5	12/02/21	LeetCode	20. Valid Parentheses
24	6	13/02/21	LeetCode	28. Implement strStr()
25	7	15/02/21	LeetCode	125. Valid Palindrome	todo
26	8	16/02/21	LeetCode	344. Reverse String
27	9	17/02/21	LeetCode	387. First Unique Character in a String
	10	22/02/21	LeetCode	26. Remove Duplicates from Sorted Array	redone
	11	23/02/21	LeetCode	122. Best Time to Buy and Sell Stock II
28	12	24/02/21	LeetCode	189. Rotate Array

March

Yearly #	Monthly #	Date	Source	Title	Note
29	1	<2021-03-08 Mon>	LeetCode	350. Intersection of Two Arrays II
30	2	<2021-03-08 Mon>	LeetCode	69. Sqrt(x)
31	3	<2021-03-01 Mon>	LeetCode	278. First bad version	todo
32	4	<2021-03-10 Wed>	LeetCode	367. Valid Perfect Square
33	5	<2021-03-10 Wed>	LeetCode	374. Guess Number Higher or Lower
34	6	<2021-03-10 Wed>	LeetCode	392. Is Subsequence
35	7	<2021-03-11 Thu>	LeetCode	704. Binary Search
36	8	<2021-03-11 Thu>	LeetCode	441. Arranging Coins	todo
37	9	<2021-03-12 Fri>	LeetCode	744. Find Smallest Letter Greater Than Target
38	10	<2021-03-13 Sat>	LeetCode	852. Peak Index in a Mountain Array
39	11	<2021-03-15 Mon>	LeetCode	1337. The K Weakest Rows in a Matrix	todo
40	12	<2021-03-16 Tue>	LeetCode	1351. Count Negative Numbers in a Sorted Matrix
41	13	<2021-03-17 Wed>	LeetCode	36. Valid Sudoku

2022

February