DSA Practice

This repository contains my data structures and algorithms practice solutions, organized by topic and practice set.

Structure

• DSA quest/
  • Array I/
  • Array II/
  • Stack /
• arrays/
• binary-search/
• binary-trees/
• dp/
• strings/

Solved Problems

Arrays

• lc_46_permutations.py - LeetCode 46, Permutations
• lc_78_subsets.py - LeetCode 78, Subsets
• lc_1291_sequential_digits.py - LeetCode 1291, Sequential Digits
• lc_1331_rank_transform_of_an_array.py - LeetCode 1331, Rank Transform of an Array
• lc_1979_greatest_common_divisor_of_array.py - LeetCode 1979, Find Greatest Common Divisor of Array
• lc_2069_walking_robot_simulation_II.py - LeetCode 2069, Walking Robot Simulation II
• lc_2574_left_and_right_sum_differences.py - LeetCode 2574, Left and Right Sum Differences
• lc_3689_maximum_total_subarray_value_I.py - LeetCode 3689, Maximum Total Subarray Value I

Binary Search

• lc_154_rotated_sorted_arrayII.py - LeetCode 154, Find Minimum in Rotated Sorted Array II

Binary Trees

• lc_2196_create_binary_trees_from_description.py - LeetCode 2196, Create Binary Tree From Descriptions

Strings

• lc_3751_total_waviness_of_numbers_in_range_I.py - LeetCode 3751, Total Waviness of Numbers in Range I
• lc_3612_process_string_with_special_operations.py - LeetCode 3612, Process String with Special Operations I

Other LeetCode

• lc_1288_remove_covered_intervals.py - LeetCode 1288, Remove Covered Intervals
• lc_3336_subsequences_with_equal_gcd.py - LeetCode 3336, Find the Number of Subsequences With Equal GCD
• lc_3754_concatenate_non_zero_digits_and_multiply_by_sum_I.py - LeetCode 3754, Concatenate Non-Zero Digits and Multiply by Sum I
• lc_3756_concatenate_non_zero_digits_and_multiply_by_sum_II.py - LeetCode 3756, Concatenate Non-Zero Digits and Multiply by Sum II

DSA Quest

• Array I/ - Practice questions Q1 to Q3
• Array II/ - Practice questions Q1 to Q3
• Stack / - Practice questions Q1 to Q2

Notes

• Filenames follow the pattern lc_<problem_number>_<problem_name>.py
• LeetCode solutions are grouped by primary topic for easier review
• DSA quest/ contains numbered practice-set solutions