📘 Leetcode-for-DSA

A curated collection of LeetCode solutions for mastering Data Structures & Algorithms
Built with ❤️ using LeetHub | Track. Solve. Grow.

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📂 Structure

Each folder is named after the LeetCode problem:

📁 0001-two-sum/
┣ 📄 solution.cpp
┣ 📄 solution.java
┗ 📄 solution.py

Problems are sorted by difficulty and topic (Easy / Medium / Hard).

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🔧 Tech Stack

• 💻 Languages: C++, Java, Python
• 🔁 Sync Tool: LeetHub
• 📚 Platform: LeetCode

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🚀 How to Use

# Step 1: Fork this repo
# Step 2: Clone it locally
git clone https://github.com/your-username/Leetcode-for-DSA.git

# Step 3: Add your own solutions following the naming convention

ARRAY

Easy Level ❤️

📚 Array - two pinter, hash table

#	No.	Title	Link	Tags	Level
1	26	Remove Duplicates from Sorted Array		Array, Two Pointers	Easy
2	27	Remove Element		Array, Two Pointers	Easy
3	88	Merge Sorted Array		Array, Two Pointers, Sorting	Easy
4	170	Two Sum III - Data Structure Design		Array, Hash Table, Two Pointers	Easy
5	283	Move Zeroes		Array, Two Pointers	Easy
6	349	Intersection of Two Arrays		Array, Hash Table, Two Pointers	Easy
7	350	Intersection of Two Arrays II		Array, Hash Table, Two Pointers	Easy
8	455	Assign Cookies		Array, Two Pointers, Greedy	Easy
9	821	Shortest Distance to a Character		Array, Two Pointers, String	Easy
10	832	Flipping an Image		Array, Two Pointers, Matrix	Easy
11	905	Sort Array By Parity		Array, Two Pointers, Sorting	Easy
12	922	Sort Array By Parity II		Array, Two Pointers, Sorting	Easy
13	942	DI String Match		Array, Two Pointers, String	Easy
14	977	Squares of a Sorted Array		Array, Two Pointers, Sorting	Easy
15	1089	Duplicate Zeros		Array, Two Pointers	Easy
16	1346	Check If N and Its Double Exist		Array, Hash Table, Two Pointers	Easy
17	1385	Find the Distance Value Between Two Arrays		Array, Two Pointers, Binary Search	Easy
18	1826	Faulty Sensor		Array, Two Pointers	Easy
19	2108	Find First Palindromic String in the Array		Array, Two Pointers, String	Easy
20	2367	Number of Arithmetic Triplets		Array, Hash Table, Two Pointers	Easy
21	2441	Largest Positive Integer That Exists With Its Negative		Array, Hash Table, Two Pointers	Easy
22	2465	Number of Distinct Averages		Array, Hash Table, Two Pointers	Easy
23	2511	Maximum Enemy Forts That Can Be Captured		Array, Two Pointers	Easy
24	2540	Minimum Common Value		Array, Hash Table, Two Pointers	Easy
25	2562	Find the Array Concatenation Value		Array, Two Pointers, Simulation	Easy
26	2570	Merge Two 2D Arrays by Summing Values		Array, Hash Table, Two Pointers	Easy

📚 Array - Sliding Window

#	No.	Title	Link	Tags	Level
1	1004	Max Consecutive Ones III		Array, Sliding Window, Two Pointers	Easy
2	1343	Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold		Array, Sliding Window	Easy
3	1456	Maximum Number of Vowels in a Substring of Given Length		String, Sliding Window	Easy
4	1493	Longest Subarray of 1's After Deleting One Element		Array, Sliding Window, Dynamic Programming	Easy
5	1652	Defuse the Bomb		Array, Sliding Window	Easy
6	1695	Maximum Erasure Value		Array, Sliding Window, Hash Table	Easy
7	1984	Minimum Difference Between Highest and Lowest of K Scores		Array, Sliding Window, Sorting	Easy
8	2024	Maximize the Confusion of an Exam		String, Sliding Window, Binary Search	Easy
9	2270	Number of Ways to Split Array		Array, Sliding Window, Prefix Sum	Easy

Medium Level ❤️❤️❤️

📘 Array - Two Pointer,Sorting , Binary Search , Greedy

#	No.	Title	LC	Tags	Level
1	11	Container With Most Water		Array, Two Pointers, Greedy	Medium
2	15	3Sum		Array, Two Pointers, Sorting	Medium
3	16	3Sum Closest		Array, Two Pointers, Sorting	Medium
4	18	4Sum		Array, Two Pointers, Sorting	Medium
5	31	Next Permutation		Array, Two Pointers	Medium
6	75	Sort Colors		Array, Two Pointers, Sorting	Medium
7	80	Remove Duplicates from Sorted Array II		Array, Two Pointers	Medium
8	167	Two Sum II - Input Array Is Sorted		Array, Two Pointers, Binary Search	Medium
9	189	Rotate Array		Array, Math, Two Pointers	Medium
10	244	Shortest Word Distance II		Array, Hash Table, Two Pointers	Medium
11	251	Flatten 2D Vector		Array, Two Pointers, Design	Medium
12	253	Meeting Rooms II		Array, Two Pointers, Greedy	Medium
13	259	3Sum Smaller		Array, Two Pointers, Binary Search	Medium
14	287	Find the Duplicate Number		Array, Two Pointers, Binary Search	Medium
15	360	Sort Transformed Array		Array, Math, Two Pointers	Medium
16	457	Circular Array Loop		Array, Hash Table, Two Pointers	Medium
17	475	Heaters		Array, Two Pointers, Binary Search	Medium
18	522	Longest Uncommon Subsequence II		Array, Hash Table, Two Pointers	Medium
19	524	Longest Word in Dictionary through Deleting		Array, Two Pointers, String	Medium
20	532	K-diff Pairs in an Array		Array, Hash Table, Two Pointers	Medium
21	581	Shortest Unsorted Continuous Subarray		Array, Two Pointers, Stack	Medium
22	611	Valid Triangle Number		Array, Two Pointers, Binary Search	Medium
23	658	Find K Closest Elements		Array, Two Pointers, Binary Search	Medium
24	723	Candy Crush		Array, Two Pointers, Matrix	Medium
25	795	Number of Subarrays with Bounded Maximum		Array, Two Pointers	Medium
26	809	Expressive Words		Array, Two Pointers, String	Medium
27	825	Friends Of Appropriate Ages		Array, Two Pointers, Binary Search	Medium
28	826	Most Profit Assigning Work		Array, Two Pointers, Binary Search	Medium
29	845	Longest Mountain in Array		Array, Two Pointers	Medium
30	870	Advantage Shuffle		Array, Two Pointers, Greedy	Medium
31	881	Boats to Save People		Array, Two Pointers, Greedy	Medium
32	923	3Sum With Multiplicity		Array, Hash Table, Two Pointers	Medium
33	948	Bag of Tokens		Array, Two Pointers, Greedy	Medium
34	969	Pancake Sorting		Array, Two Pointers, Greedy	Medium
35	986	Interval List Intersections		Array, Two Pointers	Medium
36	1040	Moving Stones Until Consecutive II		Array, Math, Two Pointers	Medium
37	1048	Longest String Chain		Array, Hash Table, Two Pointers	Medium
38	1229	Meeting Scheduler		Array, Two Pointers, Sorting	Medium
39	1471	The k Strongest Values in an Array		Array, Sorting	Medium
40	1498	Subsequences Satisfying the Given Sum Condition		Array, Two Pointers, Binary Search	Medium
41	1508	Range Sum of Sorted Subarray Sums		Array, Two Pointers, Binary Search	Medium
42	1570	Dot Product of Two Sparse Vectors		Array, Hash Table, Two Pointers	Medium
43	1574	Shortest Subarray to be Removed to Make Array Sorted		Array, Two Pointers, Binary Search	Medium
44	1577	Square Equals Product of Two Numbers		Array, Hash Table, Math	Medium
45	1679	Max Number of K-Sum Pairs		Array, Hash Table, Two Pointers	Medium
46	1712	Ways to Split Array Into Three Subarrays		Array, Two Pointers, Binary Search	Medium
47	1813	Sentence Similarity III		Array, Two Pointers, String	Medium
48	1855	Max Distance Between a Pair of Values		Array, Two Pointers, Binary Search	Medium
49	1861	Rotating the Box		Array, Two Pointers, Matrix	Medium
50	1868	Product of Two Run-Length Encoded Arrays		Array, Two Pointers	Medium
51	1877	Minimize Maximum Pair Sum in Array		Array, Two Pointers, Greedy	Medium
52	2105	Watering Plants II		Array, Two Pointers, Simulation	Medium
53	2149	Rearrange Array Elements by Sign		Array, Two Pointers, Simulation	Medium
54	2161	Partition Array According to Given Pivot		Array, Two Pointers, Simulation	Medium
55	2300	Successful Pairs of Spells and Potions		Array, Two Pointers, Binary Search	Medium
56	2332	Latest Time to Catch a Bus		Array, Two Pointers, Binary Search	Medium
57	2406	Divide Intervals Into Min Number of Groups		Array, Two Pointers, Greedy	Medium
58	2410	Max Matching of Players With Trainers		Array, Two Pointers, Greedy	Medium
59	2422	Merge Operations to Turn Array Into Palindrome		Array, Two Pointers, Greedy	Medium
60	2462	Total Cost to Hire K Workers		Array, Two Pointers	Medium
61	2491	Divide Players Into Teams of Equal Skill		Array, Hash Table, Two Pointers	Medium
62	2563	Count the Number of Fair Pairs		Array, Two Pointers, Binary Search	Medium
63	2576	Max Number of Marked Indices		Array, Two Pointers, Binary Search	Medium
64	2592	Maximize Greatness of an Array		Array, Two Pointers, Greedy	Medium

📘 Array - Sliding Window , Binary Search, Hash Table

#	No.	Title	LC Link	Tags	Level
1	209	Minimum Size Subarray Sum		Array, Binary Search, Sliding Window	Medium
2	487	Max Consecutive Ones II		Array, DP, Sliding Window	Medium
3	658	Find K Closest Elements		Array, Two Pointers, Binary Search	Medium
4	713	Subarray Product Less Than K		Array, Sliding Window	Medium
5	718	Maximum Length of Repeated Subarray		Array, Binary Search	Medium
6	904	Fruit Into Baskets		Array, Hash Table, Sliding Window	Medium
7	930	Binary Subarrays With Sum		Array, Hash Table, Sliding Window	Medium
8	978	Longest Turbulent Subarray		Array, DP, Sliding Window	Medium
9	1004	Max Consecutive Ones III		Array, Binary Search, Sliding Window	Medium
10	1031	Max Sum of Two Non-Overlapping Subarrays		Array, DP, Sliding Window	Medium
11	1052	Grumpy Bookstore Owner		Array, Sliding Window	Medium
12	1151	Min Swaps to Group All 1's Together		Array, Sliding Window	Medium
13	1248	Count Number of Nice Subarrays		Array, Hash Table, Math	Medium
14	1343	Subarrays of Size K with Avg ≥ Threshold		Array, Sliding Window	Medium
15	1423	Max Points You Can Obtain from Cards		Array, Sliding Window, Prefix Sum	Medium
16	1438	Longest Continuous Subarray Abs Diff ≤ Limit		Array, Queue, Sliding Window	Medium
17	1477	Two Non-overlapping Subarrays With Target Sum		Array, Hash Table, Binary Search	Medium
18	1493	Longest Subarray of 1's After Deleting One Element		Array, DP, Sliding Window	Medium
19	1658	Min Operations to Reduce X to Zero		Array, Hash Table, Binary Search	Medium
20	1695	Maximum Erasure Value		Array, Hash Table, Sliding Window	Medium
21	1696	Jump Game VI		Array, DP, Queue	Medium
22	1838	Frequency of the Most Frequent Element		Array, Binary Search, Greedy	Medium
23	1852	Distinct Numbers in Each Subarray		Array, Hash Table, Sliding Window	Medium
24	1918	Kth Smallest Subarray Sum		Array, Binary Search, Sliding Window	Medium
25	2090	K Radius Subarray Averages		Array, Sliding Window	Medium
26	2107	Unique Flavors After Sharing K Candies		Array, Hash Table, Sliding Window	Medium
27	2134	Minimum Swaps to Group All 1's Together II		Array, Sliding Window	Medium
28	2260	Minimum Consecutive Cards to Pick Up		Array, Hash Table, Sliding Window	Medium
29	2401	Longest Nice Subarray		Array, Bit Manipulation, Sliding Window	Medium
30	2411	Smallest Subarrays With Max Bitwise OR		Array, Binary Search, Bit Manipulation	Medium
31	2461	Maximum Sum of Distinct Subarrays of Length K		Array, Hash Table, Sliding Window	Medium
32	2537	Count the Number of Good Subarrays		Array, Hash Table, Sliding Window	Medium
33	2555	Maximize Win From Two Segments		Array, Binary Search, Sliding Window	Medium
34	2653	Sliding Subarray Beauty		Array, Hash Table, Sliding Window	Medium

Hard level ❤️❤️❤️❤️❤️

📚 Array - two pointer, Binary Search

42. Trapping Rain Water-Array,Two Pointers,3+
43. Find K-th Smallest Pair Distance-Array,Two Pointers,Binary Search,1+
44. Get the Maximum Score-Array,Two Pointers,2+
45. Closest Subsequence Sum,Array,Two Pointers,3+
46. Maximum Score of a Good Subarray-Array,Two Pointers,Binary Search,2+
47. Partition Array Into Two Arrays to Minimize Sum Difference-Array,Two Pointers,Binary Search,4+
48. Maximum Total Beauty of the Gardens-Array,Two Pointers,Binary Search,2+

📚 Array - Sliding Window, Hash Tbale , Binary Search

220. Contains Duplicate III-Array,Sliding Window,Sorting,2+
221. Sliding Window Maximum-Array,Queue,Sliding Window,2+
222. Sliding Window Median-Array,Hash Table,Sliding Window,1+
223. Smallest Range Covering Elements from K Lists-Array,Hash Table,Greedy,3+
224. K Empty Slots-Array,Binary Indexed Tree,2+
225. Shortest Subarray with Sum at Least K-Array,Binary Search,Queue,4+
226. Subarrays with K Different Integers-Array,Hash Table,Sliding Window,1+
227. Minimum Number of K Consecutive Bit Flips-Array,Bit Manipulation,Queue,2+
228. Constrained Subsequence Sum-Array,Dynamic Programming,Queue,3+
229. Max Value of Equation-Array,Queue,Sliding Window,2+
230. Maximum Number of Visible Points-Array,Math,Geometry,2+
231. Minimum Adjacent Swaps for K Consecutive Ones-Array,Greedy,Sliding Window,1+
232. Maximum Fruits Harvested After at Most K Steps-Array,Binary Search,Sliding Window,1+
233. Count Subarrays With Score Less Than K-Array,Binary Search,Sliding Window,1+
234. Maximum Number of Robots Within Budget-Array,Binary Search,Queue,3+
235. Count Subarrays With Fixed Bounds-Array,Queue,Sliding Window,1+
236. Maximum Frequency Score of a Subarray-Array,Hash Table,Math,1+
237. Maximize the Minimum Powered City-Array,Binary Search,Greedy,3+

Trees and Graphs:

https://leetcode.com/problems/tree-of-coprimes/ https://leetcode.com/problems/redundant-connection-ii/ https://leetcode.com/problems/minimum-score-after-removals-on-a-tree/ https://leetcode.com/problems/minimize-malware-spread/ https://leetcode.com/problems/is-graph-bipartite/ https://leetcode.com/problems/jump-game-iii/ https://leetcode.com/problems/all-nodes-distance-k-in-binary-tree/ https://leetcode.com/problems/detonate-the-maximum-bombs/ https://leetcode.com/problems/cycle-length-queries-in-a-tree/ https://leetcode.com/problems/count-subtrees-with-max-distance-between-cities/ https://leetcode.com/problems/binary-trees-with-factors/ (with DP) https://leetcode.com/problems/find-eventual-safe-states/ https://leetcode.com/problems/open-the-lock/ https://leetcode.com/problems/surrounded-regions/ https://leetcode.com/problems/minimize-the-total-price-of-the-trips/ https://leetcode.com/problems/create-components-with-same-value/ https://leetcode.com/problems/minimum-cost-to-reach-destination-in-time/ (+DP) https://leetcode.com/problems/find-critical-and-pseudo-critical-edges-in-minimum-spanning-tree/ https://leetcode.com/problems/minimum-score-after-removals-on-a-tree/ https://leetcode.com/problems/divide-nodes-into-the-maximum-number-of-groups/ BFS / DFS ( Shortest Paths )

https://leetcode.com/problems/minimum-genetic-mutation/ https://leetcode.com/problems/nearest-exit-from-entrance-in-maze/ https://leetcode.com/problems/shortest-path-in-binary-matrix/ https://leetcode.com/problems/maximum-number-of-points-from-grid-queries/ (with binary search) https://leetcode.com/problems/minimum-time-to-visit-a-cell-in-a-grid/ https://leetcode.com/problems/number-of-restricted-paths-from-first-to-last-node/ (with DP) https://leetcode.com/problems/bus-routes/ Hashmaps

https://leetcode.com/problems/sum-of-matrix-after-queries/ https://leetcode.com/problems/determine-if-two-strings-are-close/ https://leetcode.com/problems/design-movie-rental-system/ Binary Trees

https://leetcode.com/problems/linked-list-in-binary-tree/ https://leetcode.com/problems/step-by-step-directions-from-a-binary-tree-node-to-another/ https://leetcode.com/problems/find-bottom-left-tree-value/ https://leetcode.com/problems/add-one-row-to-tree/ https://leetcode.com/problems/insufficient-nodes-in-root-to-leaf-paths/ https://leetcode.com/problems/path-in-zigzag-labelled-binary-tree/ https://leetcode.com/problems/binary-tree-coloring-game/ https://leetcode.com/problems/number-of-good-leaf-nodes-pairs/ Bitwise Operations :

leetcode.com/problems/neighboring-bitwise-xor/ https://leetcode.com/problems/longest-nice-subarray/ https://leetcode.com/problems/find-kth-largest-xor-coordinate-value/ https://leetcode.com/problems/number-of-steps-to-reduce-a-number-in-binary-representation-to-one/ https://leetcode.com/problems/minimum-operations-to-form-subsequence-with-target-sum/ Recursion :

https://leetcode.com/problems/find-the-punishment-number-of-an-integer/ https://leetcode.com/problems/maximum-number-of-achievable-transfer-requests/ https://leetcode.com/problems/split-array-into-fibonacci-sequence/ https://leetcode.com/problems/numbers-with-same-consecutive-differences/ Sliding Window

https://leetcode.com/problems/maximum-sum-of-distinct-subarrays-with-length-k/ https://leetcode.com/problems/max-consecutive-ones-iii/ https://leetcode.com/problems/count-zero-request-servers/ https://leetcode.com/problems/continuous-subarrays/ https://leetcode.com/problems/maximize-the-confusion-of-an-exam/ https://leetcode.com/problems/length-of-the-longest-valid-substring/ Stack

https://leetcode.com/problems/number-of-visible-people-in-a-queue/ https://leetcode.com/problems/robot-collisions/ https://leetcode.com/problems/sum-of-subarray-minimums/ https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string-ii/ https://leetcode.com/problems/asteroid-collision/ https://leetcode.com/problems/largest-rectangle-in-histogram/ https://leetcode.com/problems/subarray-with-elements-greater-than-varying-threshold/ https://leetcode.com/problems/apply-operations-to-maximize-score/ https://leetcode.com/problems/beautiful-towers-ii/ Dynamic Programming

https://leetcode.com/problems/count-vowels-permutation/ (A medium level problem) https://leetcode.com/problems/russian-doll-envelopes/ https://leetcode.com/problems/maximum-alternating-subsequence-sum/ https://leetcode.com/problems/maximum-absolute-sum-of-any-subarray/ https://leetcode.com/problems/longest-arithmetic-subsequence/ https://leetcode.com/problems/tallest-billboard/ https://leetcode.com/problems/decremental-string-concatenation/ https://leetcode.com/problems/count-all-possible-routes/ https://leetcode.com/problems/sum-of-imbalance-numbers-of-all-subarrays/ https://leetcode.com/problems/knight-dialer/ https://leetcode.com/problems/longest-arithmetic-subsequence-of-given-difference/ https://leetcode.com/problems/maximum-number-of-events-that-can-be-attended-ii/ https://leetcode.com/problems/number-of-longest-increasing-subsequence/ https://leetcode.com/problems/minimum-sideway-jumps/ https://leetcode.com/problems/minimum-ascii-delete-sum-for-two-strings/ https://leetcode.com/problems/minimum-difficulty-of-a-job-schedule/ https://leetcode.com/problems/student-attendance-record-ii/ Linked Lists

https://leetcode.com/problems/merge-in-between-linked-lists/ https://leetcode.com/problems/remove-nodes-from-linked-list/ https://leetcode.com/problems/delete-the-middle-node-of-a-linked-list/ https://leetcode.com/problems/split-linked-list-in-parts/ https://leetcode.com/problems/reverse-linked-list-ii/ Bitmasking DP

https://leetcode.com/problems/number-of-ways-to-stay-in-the-same-place-after-some-steps/ https://leetcode.com/problems/maximize-score-after-n-operations/ https://leetcode.com/problems/special-permutations/ https://leetcode.com/problems/minimum-number-of-work-sessions-to-finish-the-tasks/ https://leetcode.com/problems/find-longest-awesome-substring/ https://leetcode.com/problems/number-of-valid-words-for-each-puzzle/ (No DP) https://leetcode.com/problems/number-of-ways-to-wear-different-hats-to-each-other/ https://leetcode.com/problems/the-number-of-good-subsets/ Suffix and Prefix Array :

https://leetcode.com/problems/find-two-non-overlapping-sub-arrays-each-with-target-sum/ (Hashmaps) https://leetcode.com/problems/minimum-deletions-to-make-string-balanced/ https://leetcode.com/problems/minimum-cost-to-make-array-equal/ (with binary search) https://leetcode.com/problems/longest-subarray-of-1s-after-deleting-one-element/ https://leetcode.com/problems/minimum-index-of-a-valid-split/ https://leetcode.com/problems/grid-game/ https://leetcode.com/problems/max-chunks-to-make-sorted-ii/ https://leetcode.com/problems/maximum-fruits-harvested-after-at-most-k-steps/ https://leetcode.com/problems/minimum-penalty-for-a-shop/ https://leetcode.com/problems/132-pattern (with sets) DSU :

https://leetcode.com/problems/accounts-merge/ https://leetcode.com/problems/satisfiability-of-equality-equations/ https://leetcode.com/problems/process-restricted-friend-requests/ https://leetcode.com/problems/graph-connectivity-with-threshold/ https://leetcode.com/problems/making-a-large-island/ Binary Search :

https://leetcode.com/problems/snapshot-array/ https://leetcode.com/problems/range-frequency-queries/ https://leetcode.com/problems/maximum-number-of-removable-characters/ leetcode.com/problems/split-array-largest-sum/ https://leetcode.com/problems/maximize-the-confusion-of-an-exam/ https://leetcode.com/problems/smallest-range-covering-elements-from-k-lists/ https://leetcode.com/problems/find-k-th-smallest-pair-distance/ https://leetcode.com/problems/kth-smallest-number-in-multiplication-table/ https://leetcode.com/problems/minimum-limit-of-balls-in-a-bag/ Digit DP

https://leetcode.com/problems/count-of-integers/ https://leetcode.com/problems/non-negative-integers-without-consecutive-ones/ https://leetcode.com/problems/count-stepping-numbers-in-range/ https://leetcode.com/problems/count-special-integers/ Sorting :

https://leetcode.com/problems/movement-of-robots/ (prefix sums) https://leetcode.com/problems/put-marbles-in-bags/ https://leetcode.com/problems/minimum-number-of-arrows-to-burst-balloons/ https://leetcode.com/problems/minimum-interval-to-include-each-query/ https://leetcode.com/problems/non-overlapping-intervals/ https://leetcode.com/problems/k-th-smallest-prime-fraction/ https://leetcode.com/problems/closest-room/ (binary search) String

https://leetcode.com/problems/lexicographically-smallest-string-after-substring-operation/ https://leetcode.com/problems/sum-of-scores-of-built-strings/ (hashing) https://leetcode.com/problems/maximum-repeating-substring/ https://leetcode.com/problems/longest-chunked-palindrome-decomposition/ https://leetcode.com/problems/shortest-palindrome/ https://leetcode.com/problems/maximum-deletions-on-a-string/ https://leetcode.com/problems/longest-duplicate-substring/ Counting

https://leetcode.com/problems/count-unique-characters-of-all-substrings-of-a-given-string/ https://leetcode.com/problems/sum-of-all-odd-length-subarrays/ https://leetcode.com/problems/count-anagrams/ Line Sweep

https://leetcode.com/problems/describe-the-painting/ https://leetcode.com/problems/my-calendar-iii/ https://leetcode.com/problems/number-of-flowers-in-full-bloom/ https://leetcode.com/problems/maximum-beauty-of-an-array-after-applying-operation/ https://leetcode.com/problems/divide-intervals-into-minimum-number-of-groups/ Re-rooting

https://leetcode.com/problems/count-number-of-possible-root-nodes/ https://leetcode.com/problems/difference-between-maximum-and-minimum-price-sum/ https://leetcode.com/problems/minimum-height-trees/ Trie

https://leetcode.com/problems/sum-of-prefix-scores-of-strings/ https://leetcode.com/problems/maximum-genetic-difference-query/ (Tree Query) https://leetcode.com/problems/prefix-and-suffix-search/

✅ Best Practices:

• Keep filenames clean (solution.cpp, solution.py)
• Add comments where necessary
• Group problems by topics (optional but encouraged)

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🤝 Contributing

Want to help expand this repository?

1. Fork it 🍴
2. Create your feature branch (git checkout -b new-solution)
3. Commit your changes (git commit -m 'Added XYZ problem')
4. Push to the branch (git push origin new-solution)
5. Open a PR 🚀

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🌟 Support & Recognition

If this project helps you:

• ⭐ Star the repo
• 🔁 Share it with peers preparing for coding interviews
• 🧠 Keep coding and contribute back!

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📄 License

This project is licensed under the MIT License. See the LICENSE file for details.

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