Leetcode-Community-Solutions

Intuitions, approaches and code for Leetcode Problems which have been explained by me with solutions. Divided based on difficulty to easily access different questions.

Leetcode Profile: https://leetcode.com/darkaadityaa/

Note:

If you find this repository helpful, consider giving it a star!

If you find my solutions helpful, consider giving them upvotes!

---

EASY

ID	Title	Solution Link
20	Valid Parentheses	https://shorturl.at/eiruT
21	Merge Two Sorted Lists	https://shorturl.at/agvy0
35	Search Insert Position	https://shorturl.at/efqvy
69	Sqrt(x)	https://shorturl.at/oyLTW
94	Binary Tree Inorder Traversal	https://shorturl.at/IQ089
100	Same Tree	https://shorturl.at/zALSZ
101	Symmetric Tree	https://shorturl.at/ahxAP
104	Maximum Depth of Binary Tree	https://shorturl.at/acmsZ
112	Path Sum	https://shorturl.at/rDFMR
160	Intersection of Two Linked Lists	https://shorturl.at/izX46
202	Happy Number	https://shorturl.at/degtY
206	Reverse Linked List	https://shorturl.at/lqt78
226	Invert Binary Tree	https://shorturl.at/hrDJ2
232	Implement Queue using Stacks	https://shorturl.at/fmKN3
326	Power of Three	https://shorturl.at/vwxN1
401	Binary Watch	https://shorturl.at/abAN6
404	Sum of Left Leaves	https://shorturl.at/dpES6
509	Fibonacci Number	https://shorturl.at/copy2
543	Diameter of Binary Tree	https://shorturl.at/dfjt9
682	Baseball Game	https://shorturl.at/acJ38
704	Binary Search	https://shorturl.at/ehqxR
872	Leaf-Similar Trees	https://shorturl.at/acdrN
997	Find the Town Judge	https://shorturl.at/qtLQ1
1046	Last Stone Weight	https://shorturl.at/dWXZ5
1863	Sum of All Subset XOR Totals	https://shorturl.at/osHW5
2099	Find Subsequence of Length K With the Largest Sum	https://shorturl.at/dprC8
2908	Check if Bitwise OR Has Trailing Zeros	https://shorturl.at/moDWZ
2996	Smallest Missing Integer Greater Than Sequential Prefix Sum	https://shorturl.at/iIMPX

---

MEDIUM

ID	Title	Solution Link
5	Longest Palindromic Substring	https://shorturl.at/GNQX7
6	Zigzag Conversion	https://shorturl.at/eRT13
24	Swap Nodes in Pairs	https://shorturl.at/JNSW6
33	Search in Rotated Sorted Array	https://shorturl.at/hjFYZ
34	Find First and Last Position of Element in Sorted Array	https://shorturl.at/botP3
39	Combination Sum	https://shorturl.at/uxJRU
46	Permutations	https://shorturl.at/bpMPW
48	Rotate Image	https://shorturl.at/cmrGU
53	Maximum Subarray	https://shorturl.at/akl26
74	Search a 2D Matrix	https://shorturl.at/gpN48
77	Combinations	https://shorturl.at/bnzG9
78	Subsets	https://shorturl.at/kpqvw
90	Subsets II	https://shorturl.at/bkmoM
96	Unique Binary Search Trees	https://shorturl.at/dAEUZ
102	Binary Tree Level Order Traversal	https://shorturl.at/BFJT2
103	Binary Tree Zigzag Level Order Traversal	https://shorturl.at/nsEOT
134	Gas Station	https://shorturl.at/psJO9
148	Sort List	https://shorturl.at/aqxFY
150	Evaluate Reverse Polish Notation	https://shorturl.at/dkNWX
162	Find Peak Element	https://shorturl.at/gqrE7
198	House Robber	https://shorturl.at/tGS08
201	Bitwise AND of Numbers Range	https://shorturl.at/bqyVW
230	Kth Smallest Element in a BST	https://shorturl.at/bJLS2
237	Delete Node in a Linked List	https://shorturl.at/aqsDY
240	Search a 2D Matrix II	https://shorturl.at/lwMS1
241	Different Ways to Add Parentheses	https://shorturl.at/kstC2
287	Find the Duplicate Number	https://shorturl.at/psDNW
337	House Robber III	https://shorturl.at/knHLY
347	Top K Frequent Elements	https://shorturl.at/awIPS
368	Largest Divisible Subset	https://shorturl.at/juAKM
380	Insert Delete GetRandom O(1)	https://shorturl.at/bBIUV
456	132 Pattern	https://shorturl.at/afjJ4
486	Predict The Winner	https://shorturl.at/frVZ0
503	Next Greater Element II	https://shorturl.at/htJV6
513	Find Bottom Left Tree Value	https://shorturl.at/kmuw6
560	Subarray Sum Equals K	https://shorturl.at/eEQT2
576	Out of Boundary Paths	https://shorturl.at/qBGT1
647	Palindromic Substrings	https://shorturl.at/oyAN2
654	Maximum Binary Tree	https://shorturl.at/beAN3
735	Asteroid Collision	https://shorturl.at/ovDN7
739	Daily Temperatures	https://shorturl.at/FIKPS
797	All Paths From Source to Target	https://shorturl.at/mLMW2
826	Most Profit Assigning Work	https://shorturl.at/gjnV0
875	Koko Eating Bananas	https://shorturl.at/vLSU9
901	Online Stock Span	https://shorturl.at/diGK5
918	Maximum Sum Circular Subarray	https://shorturl.at/lpFQR
931	Minimum Falling Path Sum	https://shorturl.at/gvR67
1011	Capacity To Ship Packages Within D Days	https://shorturl.at/htxAH
1019	Next Greater Node In Linked List	https://shorturl.at/pFMQ8
1026	Maximum Difference Between Node and Ancestor	https://shorturl.at/GPV48
1043	Partition Array for Maximum Sum	https://shorturl.at/boIV7
1079	Letter Tile Possibilities	https://shorturl.at/morxV
1094	Car Pooling	https://shorturl.at/ahlrw
1143	Longest Common Subsequence	https://shorturl.at/npS35
1169	Invalid Transactions	https://shorturl.at/itCST
1239	Maximum Length of a Concatenated String with Unique Characters	https://shorturl.at/mJUX0
1302	Deepest Leaves Sum	https://shorturl.at/kmrJT
1347	Minimum Number of Steps to Make Two Strings Anagram	https://shorturl.at/swGU2
1448	Count Good Nodes in Binary Tree	https://shorturl.at/ajn24
1457	Pseudo-Palindromic Paths in a Binary Tree	https://shorturl.at/jxAQY
1552	Magnetic Force Between Two Balls	https://shorturl.at/fhiqZ
1686	Stone Game VI	https://shorturl.at/ktzBH
1922	Count Good Numbers	https://shorturl.at/K2359
2064	Minimized Maximum of Products Distributed to Any Store	https://shorturl.at/qDTZ9
2095	Delete the Middle Node of a Linked List	https://shorturl.at/dfklA
2125	Number of Laser Beams in a Bank	https://shorturl.at/sIUW5
2226	Maximum Candies Allocated to K Children	https://shorturl.at/lvBC4
2385	Amount of Time for Binary Tree to Be Infected	https://shorturl.at/aciz2
2550	Count Collisions of Monkeys on a Polygon	https://shorturl.at/coAFL
2594	Minimum Time to Repair Cars	https://shorturl.at/dAKLZ
2870	Minimum Number of Operations to Make Array Empty	https://shorturl.at/puKV5
2966	Divide Array Into Arrays With Max Difference	https://shorturl.at/buyUV
2981	Find Longest Special Substring That Occurs Thrice I	https://shorturl.at/jtv04
2982	Find Longest Special Substring That Occurs Thrice II	https://shorturl.at/diqBK
2997	Minimum Number of Operations to Make Array XOR Equal to K	https://shorturl.at/dinrV
2998	Minimum Number of Operations to Make X and Y Equal	https://shorturl.at/stJV1

---

HARD

ID	Title	Solution Link
4	Median of Two Sorted Arrays	https://shorturl.at/styQT
23	Merge k Sorted Lists	https://shorturl.at/DGO68
25	Reverse Nodes in k-Group	https://shorturl.at/cPRZ1
32	Longest Valid Parentheses	https://shorturl.at/brC37
37	Sudoku Solver	https://shorturl.at/jknP4
41	First Missing Positive	https://shorturl.at/bfCGO
42	Trapping Rain Water	https://shorturl.at/bKW59
51	N-Queens	https://shorturl.at/ceoI4
52	N-Queens II	https://shorturl.at/demDQ
76	Minimum Window Substring	https://shorturl.at/bmAMY
84	Largest Rectangle in Histogram	https://shorturl.at/ioqRW
124	Binary Tree Maximum Path Sum	https://shorturl.at/doTU1
127	Word Ladder	https://shorturl.at/csNW7
135	Candy	https://shorturl.at/nrtHK
154	Find Minimum in Rotated Sorted Array II	https://shorturl.at/dzL16
218	The Skyline Problem	https://shorturl.at/gmrE5
239	Sliding Window Maximum	https://shorturl.at/evD08
295	Find Median from Data Stream	https://shorturl.at/knsH7
354	Russian Doll Envelopes	https://shorturl.at/djRS4
410	Split Array Largest Sum	https://shorturl.at/myUY0
432	All O'one Data Structure	https://shorturl.at/dlpS7
493	Reverse Pairs	https://shorturl.at/cpQX6
629	K Inverse Pairs Array	https://shorturl.at/fhWY7
719	Find K-th Smallest Pair Distance	https://shorturl.at/iNOW1
857	Minimum Cost to Hire K Workers	https://shorturl.at/bdKQV
862	Shortest Subarray with Sum at Least K	https://shorturl.at/gjvxS
871	Minimum Number of Refueling Stops	https://shorturl.at/S1457
887	Super Egg Drop	https://shorturl.at/ekyEW
980	Unique Paths III	https://shorturl.at/jnuV4
987	Vertical Order Traversal of a Binary Tree	https://shorturl.at/dlqBI
1793	Maximum Score of a Good Subarray	https://shorturl.at/gqt19
2402	Meeting Rooms III	https://shorturl.at/ejsU5
2421	Number of Good Paths	https://shorturl.at/inRV6
2858	Minimum Edge Reversals So Every Node Is Reachable	https://shorturl.at/ckDL9