GitHub - VIRAJGALFAT/Leetcode-Solutions: LeetCode solutions organized by topic with optimized approaches, time & space complexity analysis, and clean implementations.

#🚀 LeetCode Solutions

My journey to mastering Data Structures & Algorithms.

📌 About This Repository

This repository contains my solutions to LeetCode problems. I focus on:

Clean code
Optimal complexity
Clear logics

🧠 Topics Covered

Arrays
Strings
Linked List
Stack & Queue
Trees
Graphs
Dynamic Programming
Recursion

📊 Progress Tracker

Difficulty	Solved
🟢 Easy	123
🟡 Medium	31
🔴 Hard	03

🛠 Languages Used

C++
Python

🎯 Goal

Solve 300+ problems !!

⭐ If you like this repo, consider starring it!

Name		Name	Last commit message	Last commit date
Latest commit History 116 Commits
.gitignore		.gitignore
102. Binary Tree Level Order Traversal		102. Binary Tree Level Order Traversal
104. Maximum Depth of Binary Tree		104. Maximum Depth of Binary Tree
11_Container_with_most_water.pdf		11_Container_with_most_water.pdf
121_best_time_to_buy_and_sell.pdf		121_best_time_to_buy_and_sell.pdf
122. Best Time to Buy and Sell Stock II		122. Best Time to Buy and Sell Stock II
125_valid_palindrome.pdf		125_valid_palindrome.pdf
1290. Convert Binary Number in a Linked List to Integer		1290. Convert Binary Number in a Linked List to Integer
1346. Check If N and Its Double Exist		1346. Check If N and Its Double Exist
1351_count_negative_numbers_in_a_sorted_matrix.pdf		1351_count_negative_numbers_in_a_sorted_matrix.pdf
1365. How Many Numbers Are Smaller Than the Current Number		1365. How Many Numbers Are Smaller Than the Current Number
13_roman_to_integer.pdf		13_roman_to_integer.pdf
144. Binary Tree Preorder Traversal		144. Binary Tree Preorder Traversal
145. Binary Tree Postorder Traversal		145. Binary Tree Postorder Traversal
1464_maximum_product_of_two_elements_of_arrays.pdf		1464_maximum_product_of_two_elements_of_arrays.pdf
147. Insertion Sort List		147. Insertion Sort List
148. Sort List		148. Sort List
1480_Running_sum_of_1D_array.pdf		1480_Running_sum_of_1D_array.pdf
1480_running_sum_of_1d_array.pdf		1480_running_sum_of_1d_array.pdf
151_reverse_words_in_strings.pdf		151_reverse_words_in_strings.pdf
1529_kth_missing_positive_number.pdf		1529_kth_missing_positive_number.pdf
167_Two_Sum_2_Input_Array_Is_Sorted.pdf		167_Two_Sum_2_Input_Array_Is_Sorted.pdf
169_majority_element_moores_algorithms.pdf		169_majority_element_moores_algorithms.pdf
1979. Find Greatest Common Divisor of Array		1979. Find Greatest Common Divisor of Array
2. Add Two Numbers		2. Add Two Numbers
2006. Count Number of Pairs With Absolute Difference K		2006. Count Number of Pairs With Absolute Difference K
2011_final_value_of_variable_after_performing_operations.pdf		2011_final_value_of_variable_after_performing_operations.pdf
202 Happy Number		202 Happy Number
204. Count Primes		204. Count Primes
209_minimum_size_subarray_sum.pdf		209_minimum_size_subarray_sum.pdf
226. Invert Binary Tree		226. Invert Binary Tree
23. Merge k Sorted Lists		23. Merge k Sorted Lists
230. Kth Smallest Element in a BST		230. Kth Smallest Element in a BST
231. Power of Two		231. Power of Two
232. Implement Queue using Stacks		232. Implement Queue using Stacks
234. Palindrome Linked List		234. Palindrome Linked List
242_valid_anagram.pdf		242_valid_anagram.pdf
2540_minimum_common_value.pdf		2540_minimum_common_value.pdf
268_missing_number_.pdf		268_missing_number_.pdf
283_move_zeros.pdf		283_move_zeros.pdf
287_find_the_duplicate_number.pdf		287_find_the_duplicate_number.pdf
28_find_the_index_of_the_first_occurrence_in_a_string.pdf		28_find_the_index_of_the_first_occurrence_in_a_string.pdf
3074_Apple_Redistribution_into_LeetCode.pdf		3074_Apple_Redistribution_into_LeetCode.pdf
347. Top K Frequent Elements		347. Top K Frequent Elements
349_intersection_of_two_arrays.pdf		349_intersection_of_two_arrays.pdf
350_intersection_of_two_arrays_2.pdf		350_intersection_of_two_arrays_2.pdf
3536. Maximum Product of Two Digits		3536. Maximum Product of Two Digits
367_valid_perfect_square.pdf		367_valid_perfect_square.pdf
374_guess_number_higher_or_lower.pdf		374_guess_number_higher_or_lower.pdf
3754. Concatenate Non-Zero Digits and Multiply by Sum I		3754. Concatenate Non-Zero Digits and Multiply by Sum I
378. Kth Smallest Element in a Sorted Matrix		378. Kth Smallest Element in a Sorted Matrix
383_ransom_note.pdf		383_ransom_note.pdf
387. First Unique Character in a String		387. First Unique Character in a String
389_find_the_difference.pdf		389_find_the_difference.pdf
392_is_subsequence.pdf		392_is_subsequence.pdf
3950. Exactly One Consecutive Set Bits Pair		3950. Exactly One Consecutive Set Bits Pair
414_Third_maximum_number.pdf		414_Third_maximum_number.pdf
442_Find_all_duplicates_in_an_array.pdf		442_Find_all_duplicates_in_an_array.pdf
448_find_all_numbers_disappeared_in_an_array.pdf		448_find_all_numbers_disappeared_in_an_array.pdf
4_median_of_two_sorted_arrays.pdf		4_median_of_two_sorted_arrays.pdf
503_next_greater_element_2.pdf		503_next_greater_element_2.pdf
511. Game Play Analysis I		511. Game Play Analysis I
53_maximum_subarray_kadanes_algorithm.pdf		53_maximum_subarray_kadanes_algorithm.pdf
55_jump_game.pdf		55_jump_game.pdf
58_length_of_the_last_word.pdf		58_length_of_the_last_word.pdf
595. Big Countries		595. Big Countries
61. Rotate List		61. Rotate List
610. Triangle Judgement		610. Triangle Judgement
645_Set_Mismatch.pdf		645_Set_Mismatch.pdf
700. Search in a Binary Search Tree		700. Search in a Binary Search Tree
701. Insert into a Binary Search Tree		701. Insert into a Binary Search Tree
704_binary_search.pdf		704_binary_search.pdf
705. Design Hashmap		705. Design Hashmap
706. Design HashMap		706. Design HashMap
82. Remove Duplicates from Sorted List II		82. Remove Duplicates from Sorted List II
83_Remove_duplicates_from_Sorted_list.py		83_Remove_duplicates_from_Sorted_list.py
86. Partition List		86. Partition List
938. Range Sum of BST		938. Range Sum of BST
94. Binary Tree Inorder Traversal		94. Binary Tree Inorder Traversal
961_n-repeated_element_in_size_2n_array.pdf		961_n-repeated_element_in_size_2n_array.pdf
976_largest_perimeter_triangle.pdf		976_largest_perimeter_triangle.pdf
98. Validate Binary Search Tree		98. Validate Binary Search Tree
Check_if_All_Characters_Have_Equal_Number_of_Occurrences.py		Check_if_All_Characters_Have_Equal_Number_of_Occurrences.py
LICENSE		LICENSE
README.md		README.md
Remove_Linked_List_Elements.py		Remove_Linked_List_Elements.py
word_Pattern.py		word_Pattern.py

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