DailyDSA

This repository consists the solutions of daily solved DSA questions from #DailyDSAWithSPG challenge.

Goal: Solve at least one problem in a day to keep away from interview fear, unemployement and to become a good problem solver.

My solutions are coded in JAVA language.

Challenge started on 1-JAN-2022 🎯 🎯 🎯

JANUARY 2022

Day	Date	Topic(s)	Difficulty	Problem(s)	Solution 1	Solution 2
1	01/01/2022	Array	Easy ✅	TwoSum	Click
2	02/01/2022	Array	Easy ✅	Final Value of Variable After Performing Operations Left Rotation	Click Click	Click
3	03/01/2022	Array,String	Easy ✅	Find Lucky Integer First Unique Character	Click Click
4	04/01/2022	Array	Easy ✅	Binary Array Sorting Move all negative elements to end	Click Click	Click
5	05/01/2022	Array	Easy ✅	Remove Element Missing Number	Click Click
6	06/01/2022	Array	Easy ✅	Move Zeroes Shuffle the Array	Click Click
7	07/01/2022	Array	Easy ✅	Merge Sorted Array Remove Duplicates from Sorted Array	Click Click
8	08/01/2022	Linked List	Easy ✅	Convert Binary Number in a Linked List to Integer Delete Node in a Linked List	Click Click
9	09/01/2022	Linked List	Easy ✅, Medium 🟧	Add Two Numbers Remove Nth Node From End of List Reverse Linked List	Click Click Click
10	10/01/2022	Linked List	Easy ✅, Medium 🟧	Design Linked List Merge Two Sorted Lists	Click Click
11	11/01/2022	Linked List	Medium 🟧	Remove Duplicates from Sorted List II Delete the Middle Node of a Linked List	Click Click
12	12/01/2022	Linked List	Easy ✅, Medium 🟧	Rotate List Intersection of Two Linked Lists	Click Click
13	13/01/2022	Linked List	Easy ✅	Linked List Cycle	Click
14	14/01/2022	Linked List	Medium 🟧	Linked List Cycle II	Click
15	15/01/2022	Linked List	Easy ✅	Palindrome Linked List Remove Linked List Elements	Click Click	Click
16	16/01/2022	Linked List	Medium 🟧,Easy ✅	Swapping Nodes in a Linked List Remove Duplicates from Sorted List Reverse Linked List II	Click Click Click	Click
17	17/01/2022	Linked List	Medium 🟧	Odd Even Linked List	Click	Click
18	18/01/2022	Linked List	Medium 🟧	Swap Nodes in Pairs	Click
19	19/01/2022	Linked List	Medium 🟧	Copy List with Random Pointer Remove loop in Linked List	Click Click
20	20/01/2022	Linked List	Hard 🟥	Reverse Nodes in k-Group	Click
21	21/01/2022	Linked List	Medium 🟧	Merge In Between Linked Lists Split Linked List in Parts	Click Click
22	22/01/2022	Recursion	Easy ✅	Power of Two Power of Four	Click Click
23	23/01/2022	Recursion	Easy ✅,Medium 🟧	Tower Of Hanoi Reverse Linked List Fibonacci Number	Click Click Click
24	24/01/2022	Recursion	Easy ✅,Medium 🟧	Subsets Reverse String	Click Click
25	25/01/2022	Recursion	Medium 🟧	Pow(x, n)	Click	Click
26	26/01/2022	Recursion	Medium 🟧	Permutations Permutations - String	Click Click
27	27/01/2022	Recursion	Medium 🟧	Decode String	Click
28	28/01/2022	Due to health issue, Not solved a problem	NA	NA	NA	NA
29	29/01/2022	Recursion	Medium 🟧,Easy ✅	K-th Symbol in Grammar Check if array is sorted	Click Click
30	30/01/2022	Recursion & BT	Medium 🟧	Combinations Combination Sum	Click Click
31	31/01/2022	Recursion & BT	Medium 🟧	Combination Sum II	Click

February 2022

Day	Date	Topic(s)	Difficulty	Problem(s)	Solution 1	Solution 2
32	01/02/2022	Recursion	Easy ✅	Min & Max Element of an Array Remove Linked List Elements	Click Click
33	02/02/2022	Recursion & BT	Medium 🟧	Rat in a Maze Problem - I	Click	Click
34	03/02/2022	Recursion & BT	Hard 🟥	N-Queens	Click
35	04/02/2022	Recursion & BT	Hard 🟥,Easy ✅	N-Queens II Number of paths	Click Click
36	05/02/2022	Dynamic Programming	Easy ✅	Climbing Stairs Fibonacci Number N-th Tribonacci Number	Click Click Click	Click Click
37	06/02/2022	Dynamic Programming	Easy ✅	Min Cost Climbing Stairs	Click
38	07/02/2022	Dynamic Programming	Medium 🟧	House Robber House Robber II	Click Click
39	08/02/2022	Dynamic Programming	Medium 🟧	Target Sum	Click
40	09/02/2022	Dynamic Programming	Medium 🟧	0-1 Knapsack	Click
41	10/02/2022	Dynamic Programming	Medium 🟧	Partition Equal Subset Sum	Click
42	11/02/2022	Dynamic Programming	Medium 🟧	Coin Change Coin Change 2	Click Click
43	12/02/2022	Dynamic Programming	Easy ✅	Pascal's Triangle	Click
44	13/02/2022	Dynamic Programming	Easy ✅	Rod Cutting	Click
45	14/02/2022	Dynamic Programming	Medium 🟧	Perfect Squares	Click
46	15/02/2022	Dynamic Programming	Easy ✅,Medium 🟧	Best Time to Buy and Sell Stock Best Time to Buy and Sell Stock II	Click Click
47	16/02/2022	Dynamic Programming	Hard 🟥,Medium 🟧	Best Time to Buy and Sell Stock III Best Time to Buy and Sell Stock IV Best Time to Buy and Sell Stock with Cooldown Best Time to Buy and Sell Stock with Transaction Fee	Click Click Click Click
48	17/02/2022	Dynamic Programming	Medium 🟧	Unique Paths	Click
49	18/02/2022	Dynamic Programming	Medium 🟧	Unique Paths II	Click
50	19/02/2022	Dynamic Programming	Easy ✅	Reach a given score	Click
51	20/02/2022	Dynamic Programming	Easy ✅	Nth catalan number	Click
52	21/02/2022	Dynamic Programming	Medium 🟧	Unique Binary Search Trees	Click
53	22/02/2022	Dynamic Programming	Medium 🟧	Delete and Earn	Click
54	23/02/2022	Dynamic Programming	Easy ✅	Counting Bits	Click
55	24/02/2022	Dynamic Programming	Easy ✅	Pascal's Triangle II	Click
56	25/02/2022	Dynamic Programming	Medium 🟧	Maximum path sum in matrix	Click
57	26/02/2022	HashMap	Easy ✅	Frequencies of Limited Range Array Elements Jewels and Stones Intersection of Two Arrays	Click Click Click
58	27/02/2022	HashMap	Medium 🟧,Easy ✅	Check If Array Pairs Are Divisible by k Count Number of Pairs With Absolute Difference K	Click Click
59	28/02/2022	HashMap	Easy ✅	Common Elements	Click
60	01/03/2022	HashMap	Easy ✅	Count the Number of Consistent Strings	Click
61	02/03/2022	HashMap	Easy ✅	Check if All Characters Have Equal Number of Occurrences Sum of Unique Elements	Click Click
62	03/03/2022	HashMap	Easy ✅	Check if the Sentence Is Pangram Kth Distinct String in an Array	Click Click	Click Click
63	04/03/2022	HashMap	Easy ✅	Largest subarray with 0 sum	Click
64	05/03/2022	HashMap	Easy ✅,Medium 🟧	First element to occur k times Encode and Decode TinyURL	Click Click
65	06/03/2022	HashMap	Medium 🟧	Longest Substring Without Repeating Characters	Click	Click
66	07/03/2022
67	08/03/2022