Python Practice Playground ✨

Welcome! This repository is my personal collection of Python code, focusing on algorithms, data structures, Object-Oriented Programming (OOP), Low-Level Design (LLD), and solutions to various coding challenges (primarily LeetCode). It serves as a space for learning, practice, and demonstrating problem-solving approaches.

Navigation: Use the Table of Contents below or expand the collapsible sections to explore different categories.

Table of Contents

• Low-Level Design (LLD)
• Maths
• Patterns
• Sorting
• Array
• Binary Search
• Graph
• Hashing
• Set
• String
• Tree
• Other Concepts
• How to Use
• Contributing

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Project Index

Click the <summary> tags to expand/collapse the detailed file lists for each category.

Low-Level Design (LLD) 🎨 (6 items)

Program Name	Location	Status	Notes
Design Stack Overflow (Conceptual)	LLD/Design Stackoverflow/	Done	Basic structure files
Basic Class Example	LLD/Oops/class.py	Done
Payment Interface Example (Interface/ABC)	LLD/Oops/interface_and_abc/payments_example/	Done	Demonstrates interface concept
Vehicle Interface Example (Interface/ABC)	LLD/Oops/interface_and_abc/vehicles_example/	Done	Demonstrates interface concept
Tic Tac Toe (Requirement Gathering Conceptual)	LLD/Tic Tac Toe/Requirement Gathering	Done	Text description
Tic Tac Toe Implementation	LLD/Tic Tac Toe/tic_tac_toe.py	Done

Maths 📐 (47 items)

Program Name	Location	Status	Notes (LeetCode #)
Is Palindrome (Integer Overflow Avoidance)	is_a_no_palindrome_bruteforce_to_avoid_integer_overflow.py	Done	9 - Variation
Is Palindrome (Compare MSB/LSB)	is_a_no_palindrome_by_comparing_lsb_and_msb_and_chopping_them_both.py	Done	9 - Variation
Is Palindrome (Optimized Integer)	is_a_no_palindrome_optimized.py	Done	9
Is Palindrome (Integer Overflow Prone)	is_a_no_palindrome_prone_to_integer_overflow.py	Done	9 - Variation
Is Palindrome (String Reverse)	is_a_no_palindrome_using_string_and_reversing_complete_string.py	Done	9 - Variation
Is Palindrome (String Two Pointer)	is_a_no_palindrome_using_string_and_using_two_pointer.py	Done	9 - Variation
Arithmetic Subarrays (Bruteforce)	arithmetic_subarrays_1630_bruteforce.py	Done	1630
Arithmetic Subarrays (Optimized)	arithmetic_subarrays_1630_optimized_without_sorting.py	Done	1630
Avg Values of Even Nos Divisible by Three	avg_values_of_even_nos_that_are_divisible_by_three_2455.py	Done	2455
Base 7	base_7_504.py	Done	504
Check If No is Sum of Power of Three	check_if_no_is_sum_of_power_of_three_1780.py	Done	1780
Check If the No is Fascinating	check_if_the_no_is_fascinating_2729.py	Done	2729
Closest Prime Numbers in Range (TLE Likely)	closest_prime_no_in_ranges_2523.py	Done	2523
Closest Prime Numbers in Range (Optimized Sieve)	closest_prime_no_in_ranges_2523_n*sqrt(n).py	Done	2523
Color of Chessboard Square	color_of_chessboard_1812.py	Done	1812
Complex Number Multiplication	complex_no_multiplication_537.py	Done	537
Count Digits	count_no_of_digits.py	Done
Count Digits (Optimized Log)	count_no_of_digits_optimized.py	Done
Count Primes (Bruteforce)	count_primes_204_bruteforce_n_*_sqrt(n).py	Done	204
Count Primes (Sieve of Eratosthenes)	count_primes_204_sieve_of_eratosthenes..py	Done	204
Count Symmetrical Integers	count_symmetrical_integers_2843.py	Done	2843
Difference Between Element Sum and Digit Sum	difference_betwen_element_sum_and_digit_sum_2535.py	Done	2535
Fibonacci Number	fibonacii_number_509.py	Done	509
Find GCD of Array	find_gcd_of_array_1979.py	Done	1979
Find if Digits Can be Won (Typo?)	find_if_digits_can_be_won_3232.py	Done	(Typo? Needs check)
Find the Difference (XOR)	find_the_difference_using_xor_389.py	Done	389
Find the Pivot Integer	find_the_pivot_integer_2485.py	Done	2485
GCD Implementation	gcd.py	Done
Harshad Number	harshad_no_3099.py	Done	3099
Is Armstrong Number	is_armstrong_no.py	Done
Is Prime (Optimized)	is_prime_optimized.py	Done
Is Ugly	is_ugly_263.py	Done	263
Max Sum of Pair with Equal Digit Sum (Bruteforce)	max_sum_of_a_pair_with_equal_sum_of_digits_2342_bruteforce_quadratic.py	Done	2342
Max Sum of Pair with Equal Digit Sum (Hashing)	max_sum_of_a_pair_with_equal_sum_of_digits_2342_linear_time_hashing.py	Done	2342
Number After Double Reversal (Modulo)	no_after_double_reversal_2119_modulous.py	Done	2119
Number of 1 Bits (Hamming Weight)	no_of_1_bits_191_logn.py	Done	191
Number of Common Factors	no_of_common_factors_2427.py	Done	2427
Number of Steps to Reduce a Number to Zero	no_of_steps_to_reduce_a_no_to_zero.py	Done	1342
Print All Divisors	print_all_divisors.py	Done
Reverse a Number	reverse_a_no.py	Done	7
Set Mismatch (Using Math)	set_mismatch_645_using_math.py	Done	645
Sieve of Eratosthenes Implementation	sieve_of_eratosthenes.py	Done
Single Element in a Sorted Array (Bruteforce)	singleNonDuplicate540.py	Done	540
Single Element in a Sorted Array (Binary Search)	singleNonDuplicate540_binary_search.py	Done	540
Square Root (Bruteforce)	square_root_of_a_no_69_bruteforce_sqrt_time_complexity.py	Done	69
Subtract Product and Sum of Digits	subtact_prod_and_sum_of_digits_of_a_no_1281.py	Done	1281
Sum Multiples	sum_multiples_2652.py	Done	2652
Sum Multiples (Optimized O(1))	sum_multiples_2652_optimized.py	Done	2652
The Kth Factor of N	the_kth_factor_of_n_1492.py	Done	1492
Three Divisors (Linear Time)	three_divisors_linear_time_1952.py	Done	1952
Three Divisors (Optimized Prime Check)	three_divisors_optimized_using_prime_no_1952.py	Done	1952
Water Bottles	water_bodies_1518.py	Done	1518
XOR Operation in an Array	xor_operation_in_array_1486.py	Done	1486

Patterns 🖼️ (11 items)

Program Name	Location	Status
Decreasing Stars Pyramid	decreasing_stars_top_to_bottom_pyramid.py	Done
Diamond Pattern	diamond.py	Done
Half Diamond Pattern	halfdiamond.py	Done
Numbers Pyramid	numbers_top_to_bottom_pyramid.py	Done
Numbers Pyramid (Alternative)	numbers_top_to_bottom_pyramid_alternative_solution.py	Done
Numbers Pyramid (Row No Repeat)	numbers_top_to_bottom_pyramid_row_no_repeat.py	Done
Stars Square Pattern	stars_square_pattern.py	Done
Stars Pyramid	stars_top_to_bottom_pyramid.py	Done
Christmas Tree	xmastree.py	Done
Inverted Christmas Tree	xmastree_inverted.py	Done

Sorting ⇅ (28 items)

Program Name	Location	Status	Notes (LC #)
Bubble Sort	bubble_sort.py	Done
Count Smaller Numbers (Bruteforce)	count_no_smaller_than_current_no_bruteforce_1365.py	Done	1365
Count Smaller Numbers (Optimized/Sorting)	count_no_smaller_than_current_no_optimized_1365.py	Done	1365
Find Target Indices After Sorting	find_target_indices_after_sorting_2089.py	Done	2089
Find the Difference (Sorting)	find_the_difference_using_sorting_389.py	Done	389
Find Integer Added to Array I	find_the_integer_added_to_array_I_3131_sorting.py	Done	3131
Height Checker	height_checker_1051.py	Done	1051
Insertion Sort	insert_sort.py	Done
Maximum Number of Coins You Can Get	maximum_no_of_coins_you_can_get_1561.py	Done	1561
Max Prod Diff (Find Max/Min)	maximum_product_difference_between_two_pairs_by_finding_two_max_and_two_mins_1913.py	Done	1913
Max Prod Diff (Sorting)	maximum_product_difference_between_two_pairs_using_sorting_1913.py	Done	1913
Max Prod of Two Elements (Linear)	maximum_product_of_two_elements_in_an_array_1464_optimized_linear_traversal.py	Done	1464
Max Prod of Two Elements (Sorting)	maximum_product_of_two_elements_in_an_array_1464_sorting.py	Done	1464
Merge Two 2D Arrays (Hashing + Sorting)	merge_two_2D_arrays_by_summing_values_2570_linear_space_hashing_and_sorting.py	Done	2570
Minimum Average of Smallest and Largest	minimum_average_of_smallest_and_largest_elements_3194.py	Done	3194
Minimum Number Game	minimum_number_game_2974.py	Done	2974
Minimum Sum of Four Digit No After Splitting	mininum_sum_of_four_digit_no_after_splitting_digits_2160.py	Done	2160
Selection Sort	selection_sort.py	Done
Sort Array By Parity (Extra Space)	sort_array_by_parity_905_extra_space.py	Done	905
Sort Array By Parity (In-place)	sort_array_by_parity_905_no_extra_space.py	Done	905
Sort Binary Array	sort_binary_array.py	Done	(Similar to 75)
Sort Colors (Counting Sort)	sort_colors_counting_sort_75.py	Done	75
Sorting the Sentence (Bruteforce)	sorting_the_sentence_1859_bruteforce.py	Done	1859
Sorting the Sentence (Hashing)	sorting_the_sentence_1859_optimized_hashing.py	Done	1859
Sorting the Sentence (Sorting)	sorting_the_sentence_1859_optimized_sorting.py	Done	1859
Third Maximum Number	third_maximum_no_414.py	Done	414
Widest Vertical Area Between Two Points	widest_vertical_area_in_graph_1637.py	Done	1637

Array 🔢 (60 items)

Program Name	Location	Status	Notes (LC #)
Apply Operations on an Array (Extra Space)	apply_operations_on_an_array_2460_extra_space.py	Done	2460
Apply Operations on an Array (Constant Space)	apply_operations_on_an_array_2460_optimized_constant_space.py	Done	2460
Build Array from Permutation	build_array_from_permutation_1920.py	Done	1920
Capacity To Ship Packages (Bruteforce)	capacity_to_ship_packages_within_d_days_1011_bruteforce_quadratic_time.py	Done	1011
Categorize Box	categorize_box_2525.py	Done	2525
Check If Array Is Sorted and Rotated (Bruteforce)	check_if_array_is_sorted_and_rotated_1752_bruteforce_quadratic_time.py	Done	1752
Check If Array Is Sorted and Rotated (Optimized)	check_if_array_is_sorted_and_rotated_1752_optimized_linear_time.py	Done	1752
Check If N and Its Double Exist	check_if_n_and_its_double_exist_1346.py	Done	1346
Count Items Matching a Rule	count_items_matching_a_rule_1773.py	Done	1773
Count Negative Numbers in Sorted Matrix (Bruteforce)	count_negative_no_in_a_sorted_array_1351_bruteforce.py	Done	1351
Count Number of Bad Pairs (Bruteforce)	count_no_of_bad_pairs_bruteforce_2364_quadratic_time.py	Done	2364
Count Pairs That Form a Complete Day I (Bruteforce)	count_pairs_that_form_a_complete_day_1_3184_bruteforce.py	Done	3184
Count Pairs With Sum Less Than Target	count_pairs_with_sum_less_than_target.py	Done	2824
Count Subarrays of Length Three (Placeholder)	count_subarrays_of_length_three_with_condition.py	Done	(Needs LC #?)
Decompress Run-Length Encoded List	decompress_run_length_encoded_list_1313.py	Done	1313
Find the Difference Between Two Arrays	difference_between_two_arrays_2215.py	Done	2215
Divide Array Into Equal Pairs (Using Array Counts)	divide_array_into_equal_parts_2206_using_array.py	Done	2206
Final Prices With Discount	final_price_with_discount_1475.py	Done	1475 - Stack
Final Value After Performing Operations	final_value_after_performing_operations_2011.py	Done	2011
Find Lucky Integer in an Array	find_lucky_integer_in_an_array_1394.py	Done	1394
Find Minimum in Rotated Sorted Array (Linear)	find_minimum_in_rotated_sorted_array_153_bruteforce_linear_time.py	Done	153
Find Missing and Repeating No (Bruteforce)	find_missing_and_repeating_no_2965_bruteforce_quadratic.py	Done	(GFG/Similar 645)
Find Peak Element (Linear)	find_peak_element_162_bruteforce_linear_time_complexity.py	Done	162
Find the Highest Altitude	find_the_highest_altitude_1732.py	Done	1732
Find Smallest Divisor Given Threshold (Bruteforce)	find_the_smallest_divisor_given_a_threshold_1283_using_bruteforce.py	Done	1283
Fizz Buzz	fizz_buzz_412.py	Done	412
Flipping an Image	flipping_an_image_832.py	Done	832
Intersection of Two Arrays	intersection_of_two_arrays_349.py	Done	349 - Set
Koko Eating Bananas (Bruteforce)	koko_eating_bananas_875_bruteforce_quadratic_time.py	Done	875
Kth Missing Positive Number (Linear)	kth_missing_positive_no_from_sorted_array_1539.py	Done	1539
Longest Inc/Dec Subarray (Bruteforce)	longest_strictly_increasing_or_decreasing_array_3015_bruteforce_quadratic_time.py	Done	(Typo 3105?)
Matrix Diagonal Sum (Bruteforce)	matrix_diagonal_sum_bruteforce_1572.py	Done	1572
Matrix Diagonal Sum (Optimized)	matrix_diagonal_sum_optimized_1572.py	Done	1572
Max Number of Words Found in Sentences	max_no_of_words_in_sentence_114.py	Done	2114
Maximum Ascending Subarray Sum (Bruteforce)	maximum_ascending_subarray_sum_1800_bruteforce_quadratic_time.py	Done	1800
Maximum Ascending Subarray Sum (Optimized)	maximum_ascending_subarray_sum_1800_optimized_linear_time.py	Done	1800
Max Count of Positive and Negative (Linear)	maximum_count_of_positive_and_negative_integers_2529_bruteforce_linear.py	Done	2529
Merge Strings Alternately	merge_strings_alternatively_1768.py	Done	1768
Minimum Absolute Difference	min_absolute_difference_1200.py	Done	1200 - Sorting
Minimum Index Sum of Two Lists	min_index_sum_of_two_lists_599.py	Done	599 - Hashing
Min No of Days to Make M Bouquets (Bruteforce)	min_no_of_days_to_make_m_bouquets_1482_bruteforce_quadratic_time.py	Done	1482
Minimum Operations Make Columns Increasing	minimum_operations_to_make_columns_strictly_increasing_3402.py	Done	(Typo?)
Minimum Cuts to Divide a Circle	mininum_cuts_to_divide_a_circle_2481.py	Done	2481
Neither Minimum nor Maximum (Linear Space)	neither_minimum_nor_maximum_2733_linear_space.py	Done	2733
Neither Minimum nor Maximum (Constant Space)	neither_minimum_nor_maximum_2733_optimized_constant_space.py	Done	2733
Number of Employees Who Met the Target	no_of_employees_who_meet_the_target_2798.py	Done	2798
Number of Pairs with Absolute Difference K	no_of_pair_with_absolute_difference_k.py	Done	2006
Number of Pairs with Sum K	no_of_pair_with_sum_k.py	Done	(Similar 1, 167)
Partition Array According to Pivot	partition_array_according_to_given_plot_2161_linear_space.py	Done	2161
Peak Index in a Mountain Array (Linear)	peak_index_in_a_mountain_array_852_bruteforce_linear.py	Done	852
Product of the Last K Numbers (Bruteforce)	product_of_last_k_numbers_1352_bruteforce.py	Done	1352
Product of the Last K Numbers (Bruteforce 2)	product_of_last_k_numbers_1352_bruteforce_solution_2.py	Done	1352
Product of the Last K Numbers (Prefix Product)	product_of_last_k_numbers_1352_optmized_prefix_product.py	Done	1352
Replace Elements with Greatest on Right	replace_elements_with_greatest_element_on_right_side_1299.py	Done	1299
Richest Customer Wealth	richest_customer_wealth_1672.py	Done	1672
Row With Maximum Ones (Bruteforce)	row_with_maximum_ones_2643_bruteforce.py	Done	2643
Row With Maximum Ones (Optimized)	row_with_maximum_ones_2643_optimized.py	Done	2643
Running Sum of 1d Array	running_sum_of_1d_array_or_cummulative_sum_1480.py	Done	1480
Search a 2D Matrix (Bruteforce)	search_a_2d_matrix_74_bruteforce_quadratic.py	Done	74
Search in Rotated Sorted Array (Linear)	search_in_rotated_sorted_array_33_bruteforce_linear_time.py	Done	33
Separate the Digits in an Array	separate_the_digits_in_an_array_2553.py	Done	2553
Set Mismatch (Using Array/Hashing)	set_mismatch_645_using_array.py	Done	645
Shuffle the Array	shuffle_the_array_1470.py	Done	1470
Special Array I	special_array_3151.py	Done	3151
String Matching in an Array (Bruteforce)	string_matching_in_array_by_1408.py	Done	1408
String Matching in an Array (Sorting)	string_matching_in_array_by_sorting_1408.py	Done	1408
Subrectangle Queries	subrectangle_queries_1476.py	Done	1476
Sum of Squares of Special Elements	sum_of_squares_of_special_elements_2778.py	Done	2778
Sort Array By Parity II (In-Place - Misnamed)	transform_array_by_parity_3467.py	Done	(Typo? Rel 905/922)
Two Sum II - Input Array Is Sorted	two_sum_for_given_sorted_array_167.py	Done	167
Valid Sudoku	valid_sudoku_36.py	Done	36
Find XOR Sum of Numbers Appearing Twice	xor_of_no_which_exist_twice_3158.py	Done	3158

Binary Search 🔍 (23 items)

Program Name	Location	Status	Notes (LC #)
Binary Search (Iterative Template)	binary_search_704.py	Done	704
Binary Search (Iterative)	binary_search_iterative.py	Done
Binary Search (Recursive)	binary_search_recursive.py	Done
Book Allocation Problem	book_allocation.py	Done	(GFG/Famous)
Capacity To Ship Packages (Binary Search)	capacity_to_ship_packages_within_d_days_1011_using_binary_search.py	Done	1011
Find First and Last Position of Element	find_first_and_last_occurence_of_element_34.py	Done	34
Find Minimum in Rotated Sorted Array (Binary Search)	find_minimum_in_rotated_sorted_array_153_binary_search.py	Done	153
Find Peak Element (Binary Search)	find_peak_element_162_optimized_binary_search.py	Done	162
Find Smallest Divisor Given Threshold (Binary Search)	find_the_smallest_divisor_given_a_threshold_1283_using_binary_search.py	Done	1283
Find Upper Bound	find_upper_bound_in_a_sorted_array.py	Done
Find Lower Bound	first_lower_bound_in_a_sorted_array.py	Done
Floor and Ceiling	floor_and_ceiling_of_a_sorted_array.py	Done
Floor in Sorted Array	floor_in_a_sorted_array.py	Done
Koko Eating Bananas (Binary Search)	koko_eating_bananas_875_binary_search.py	Done	875
Kth Missing Positive Number (Binary Search)	kth_missing_positive_no_from_sorted_array_1539_binary_search.py	Done	1539
Max Count of Positive and Negative (Binary Search)	maximum_count_of_positive_and_negative_integers_2529_binary_search.py	Done	2529
Min No of Days to Make M Bouquets (Binary Search)	min_no_of_days_to_make_m_bouquets_1482_using_binary_search.py	Done	1482
Peak Index in a Mountain Array (Binary Search)	peak_index_in_a_mountain_array_852_binary_search.py	Done	852
Row with Maximum Ones (Binary Search)	row_with_maximum_ones_row_wise_sorted_binary_search_gfg.py	Done	(GFG/Rel 2643)
Search a 2D Matrix (Binary Search mlogn)	search_a_2d_matrix_74_bruteforce_binary_search_mlogn.py	Done	74
Search a 2D Matrix (Binary Search log(m*n))	search_a_2d_matrix_74_optimized_binary_search_logm+n.py	Done	74
Search in Infinite Sorted Array	search_in_infinite_sorted_array.py	Done	(Common Prob)
Search in Rotated Sorted Array (Binary Search)	search_in_rotated_sorted_array_33_binary_search.py	Done	33
Search in Rotated Sorted Array II (Duplicates)	search_in_rotated_sorted_array_having_duplicates_81_binary_search.py	Done	81
Search Insert Position	search_insert_position_35.py	Done	35
Square Root (Binary Search)	square_root_of_a_no_69_optimized_binary_search.py	Done	69
Square Root (Binary Search Alt)	square_root_of_a_no_69_optimized_binary_search_using_ans.py	Done	69
Valid Perfect Square	valid_perfect_square_367.py	Done	367

Graph 🕸️ (3 items)

Program Name	Location	Status	Notes (LC #)
Find Center of Star Graph (Optim.)	find_center_of_star_graph_optimized_1791.py	Done	1791
Find Center of Star Graph (Hash)	find_center_of_star_graph_using_hashing1791.py	Done	1791
Number of Islands	no_of_islands_200.py	Done	200 - DFS/BFS

Hashing 🔑 (25 items)

Program Name	Location	Status	Notes (LC #)
Common Elements Between Two Arrays	common_elements_between_two_arrays_2956.py	Done	2956
Contains Duplicate	contains_dupilcate_217.py	Done	217
Count Frequency	count_frequency.php.py	Done	(Filename typo)
Determine if String Halves Are Alike	determine_if_string_halves_are_alike_1704.py	Done	1704
Divide Array Into Equal Pairs	divide_array_into_equal_parts_2206.py	Done	2206
Find the Difference (Hashing)	find_the_difference_389.py	Done	389
Find Words That Can Be Formed by Characters	find_words_219.py	Done	1160
Basic Hashing Function Example	hashing_function.py	Done
HashMap Chaining Example	hashmap_chaining_to_avoid_collision.py	Done
HashMap Class Example	hashmap_class.py	Done
Intersection of Two Arrays II	intersection_of_two_arrays_II_350.py	Done	350
Isomorphic Strings	isomorphic_strings_205.py	Done	205
Jewels and Stones (Dict)	jewels_and_stones_dictionary_way_771.py	Done	771
Jewels and Stones (Loops)	jewels_and_stones_long_way_771.py	Done	771
Jewels and Stones (Set)	jewels_and_stones_using_set_771.py	Done	771
Kth Distinct String in an Array	kth_distinct_string_in_an_array_2053.py	Done	2053
Majority Element	majority_element_169.py	Done	169
Merge Two 2D Arrays (Hashing)	merge_two_2D_arrays_by_summing_values_2570_linear_space_hashing.py	Done	2570
Min Pushes to Type Word II	min_no_of_pushes_to_type_word_II_3016_hashing.py	Done	3016
Minimum Steps to Make Two Strings Anagram	minimum_no_of_steps_to_make_two_strings_anagram_1347.py	Done	1347
Missing Number	missing_number_268.py	Done	268
Most Frequent/Least Frequent Element	most_frequent_least_frequent_element.py	Done	(Custom)
Ransom Note	ransom_note_383.py	Done	383
Single Number	single_number_136.py	Done	136 - XOR better
Sum of Unique Elements	sum_of_unique_elements_1748.py	Done	1748
Two Sum	two_sum_1.py	Done	1
Valid Anagram	valid_anagram_242.py	Done	242
Word Pattern	word_pattern_290.py	Done	290

Set 🧊 (2 items)

Program Name	Location	Status	Notes (LC #)
Greatest English Letter (Set)	greatest_english_letter_in_upper_case_and_lower_case_2309_optimized_set.py	Done	2309
Unique Email Addresses	unique_email_address_929.py	Done	929

String 📜 (49 items)

Program Name	Location	Status	Notes (LC #)
Capitalize the Title	capitalize_the_title_2129.py	Done	2129
Cells in Range on Excel Sheet	cells_in_the_range_of_an_excel_sheet_2194.py	Done	2194
Check if String Is Good (Likely Misnamed)	check_balanced_string_3340.py	Done	(Typo? Needs check)
Check if All A's Appear Before All B's	check_if_all_a's_appear_before_all_b's_2124.py	Done	2124
Check if All A's Appear Before All B's (Optimized)	check_if_all_a's_appear_before_all_b's_2124_optimized.py	Done	2124
Check if All Characters Have Equal Occurrences	check_if_all_characters_have_equal_no_of_occurences_1942.py	Done	1941
Check if Numbers Are Ascending in Sentence	check_if_no_are_in_ascending_order_in_a_sentence_2042.py	Done	2042
Check if One Swap Makes Strings Equal (Extra Space)	check_if_one_character_swap_can_make_two_strings_equal_1790_extra_space.py	Done	1790
Check if One Swap Makes Strings Equal (No Extra)	check_if_one_character_swap_can_make_two_strings_equal_1790_no_extra_space.py	Done	1790
Check if Sentence Is Pangram	check_if_sentence_is_pangram_1832.py	Done	1832
Check If String Is Acronym of Words	check_if_string_is_acronym_of_words_2828.py	Done	2828
Check If Two String Arrays are Equivalent (BF)	check_if_two_string_arrays_are_equivalent_1662_bruteforce_quadratic_because_of_list_are_immutable.py	Done	1662
Check If Two String Arrays are Equivalent (Opt)	check_if_two_string_arrays_are_equivalent_1662_optimized.py	Done	1662
Convert Date Format (Likely Misnamed)	convert_date_to_binary_3280.py	Done	(Typo? Needs check)
Count Prefix and Suffix Pairs I (BF)	count_prefix_and_suffix_pairs_3042_bruteforce.py	Done	3042
Count Vowel Strings in Ranges	count_vowel_string_in_ranges_2559.py	Done	2559 - Prefix Sum
Count Words With Given Prefix	count_words_with_given_prefix_2185.py	Done	2185
Decode the Message	decode_the_message_2325.py	Done	2325
Decrypt String from Alphabet to Integer Mapping	decrypt_string_from_alphabet_to_integer_mapping_1309.py	Done	1309
Defanging an IP Address	defanging_an_ip_address_1108.py	Done	1108
Faulty Keyboard	faulty_keyboard_2810.py	Done	2810
Find First Palindromic String in Array	find_first_palindromic_string_in_array_2108.py	Done	2108
Find Indices of Subarrays w/ Boundary Condition	find_indices_of_stable_mountains_3285.py	Done	(Typo?)
Find Unique Binary String (Optimized Cantor)	find_unique_binary_string_1980_optimized_cantors_diagonalization.py	Done	1980
Find Unique Binary String (BF Set)	find_unique_binary_string_1980_quadratic_time.py	Done	1980
First Letter to Appear Twice	first_letter_to_appear_twice_2351.py	Done	2351 - Set
Goal Parser Interpretation	goal_parser_interpretation_1678.py	Done	1678
Greatest English Letter (Array/Hashing)	greatest_english_letter_in_upper_case_and_lower_case_2309.py	Done	2309
Calculate Digit Sum of a String (Likely Misnamed)	hash_divided_string_3271.py	Done	(Typo? Rel 1945)
Largest Odd Number in String	largest_odd_no_in_string_1903.py	Done	1903
Max Nesting Depth of Parentheses	max_nesting_depth_of_parantheses_1614.py	Done	1614
Max Number of String Pairs (Optimized Set)	max_no_of_string_pairs_2744_optimized_linear_time.py	Done	2744
Max Number of String Pairs (BF)	max_no_of_string_pairs_2744_quadratic_time.py	Done	2744
Maximum Odd Binary Number	max_odd_binary_no_2864.py	Done	2864
Min Pushes to Type Word I (BF - Misnamed file)	min_no_of_pushes_to_type_word_II_3016_bruteforce.py	Done	3015
Number After Double Reversal (String)	no_after_double_reversal_2119_string.py	Done	2119
Number of Changing Keys	no_of_changing_keys_3019.py	Done	3019
Number of Consistent Strings	no_of_consistent_string_1684.py	Done	1684 - Set
Number of Pairs Concatenation Equal Target (BF)	no_of_pairs_with_concatenation_equal_to_target_2023_quadratic_time.py	Done	2023
Number of Senior Citizens	no_of_senior_citizens_2678.py	Done	2678
Percentage of Letter in String	percentage_of_letter_in_string_2278.py	Done	2278
Removing Trailing Zeros From a String	removing_trailing_zero_from_a_string_2710.py	Done	2710
String Score (Likely Misnamed)	reverse_degree_of_a_string_3498.py	Done	(Typo? Rel 3110)
Reverse Prefix of Word	reverse_prefix_of_word_2000.py	Done	2000
Robot Return to Origin	robot_return_to_origin_657.py	Done	657
Score of a String	score_of_a_string_3110.py	Done	3110
Shuffle String (BF)	shuffle_string_1528_bruteforce.py	Done	1528
Shuffle String (Linear Extra Space)	shuffle_string_1528_linear_line_extra_time_complexity.py	Done	1528
Shuffle String (In-place Cycle Sort - Misnamed)	shuffle_string_1528_linear_line_optimized.py	Done	1528
Snake in Matrix (Likely Misnamed)	snake_in_matrix_3248.py	Done	(Typo?)
Split Strings by Separator	split_strings_by_separator_2788.py	Done	2788
Strictly Palindromic Number	strictly_palindromic_no_2396.py	Done	2396
Sum of Digits of String After Convert	sum_of_digit_of_string_after_convert_1945.py	Done	1945
To Lower Case	to_lower_case_709.py	Done	709
Truncate Sentence	truncate_sentence_1816.py	Done	1816
Uncommon Words from Two Sentences	uncommon_words_from_two_sentences_884.py	Done	884 - Hashing
Unique Morse Code Words	unique_morse_code_words_804.py	Done	804 - Set

Tree 🌳 (4 items)

Program Name	Location	Status	Notes (LC #)
Binary Tree Inorder Traversal	binary_tree_inorder_traversal_94.py	Done	94
Binary Tree Level Order Traversal	binary_tree_level_order_traversal_102.py	Done	102
Binary Tree Postorder Traversal	binary_tree_postorder_traversal_94.py	Done	145
Binary Tree Preorder Traversal	binary_tree_preorder_traversal_144.py	Done	144

Other Concepts 💡 (10 items)

Program Name	Location	Status	Notes
Basic Loops Example	Loops/loops.py	Done
Factorial	recursion/factorial.py	Done
Fibonacci	recursion/fibonacci.py	Done
Max in Array (Recursion)	recursion/max_in_an_array.py	Done
Min in Array (Recursion)	recursion/min_in_an_array.py	Done
Print Reverse String (Recursion)	recursion/printReverseString.py	Done
Print Array (Recursion)	recursion/print_elements_of_array.py	Done
Print Array Reverse (Recursion)	recursion/print_elements_of_array_reverse_order.py	Done
Python Profiling - Bottleneck	[pythonprofiling/bottleneck_checking.py](Python Concepts/Python Profiling/bottleneck_checking.py)	Done	Example
Python Profiling - Frequencies	[pythonprofiling/call_frequencies.py](Python Concepts/Python Profiling/call_frequencies.py)	Done	Example
Python Profiling - Time Check	[pythonprofiling/optimization_time_check.py](Python Concepts/Python Profiling/optimization_time_check.py)	Done	Example

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How to Use

1. Clone the repository:

   git clone <your-repo-url>

2. Navigate: Browse the directories based on the category you're interested in (e.g., cd array).
3. Run: Execute the Python files directly using python <filename>.py. Check individual files for any specific usage notes or required inputs.

Contributing

This repository is primarily for my personal learning and practice. However, constructive feedback, suggestions for optimizations, or bug reports are welcome! Please feel free to open an issue.

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