Leetcode Submissions

Timeline:
September 2024 - Present

Languages Used:

Python3
Java

Learning Resources:

1. NeetCode Blind-75 Playlist

I started by going through the Blind-75 Playlist from NeetCode to learn dynamic programming and data structures.

Completion Date: 2025-01-21
NeetCode Blind-75 Playlist

2. Sean Prashad Leetcode Patterns

Now, I am working through Sean Prashad’s Leetcode Patterns to further enhance my problem-solving skills.

Sean Prashad Leetcode Patterns
Currently done 30/174 Problems

Future to-do List:

Neetcode 150, Neetcode 250
Create a journal entry on how LeetCode affected my problem solving skills.

Summary:

This repository contains my Leetcode submissions from September 2024 onwards. I have been progressively working on solving algorithmic problems and applying various data structures and dynamic programming techniques.

Feel free to explore my submissions and patterns I have learned along the way!

LeetCode Topics

Array

Problem Name	Difficulty
0001-two-sum	Easy
0011-container-with-most-water	Medium
0015-3sum	Medium
0026-remove-duplicates-from-sorted-array	Easy
0027-remove-element	Easy
0033-search-in-rotated-sorted-array	Medium
0064-minimum-path-sum	Medium
0080-remove-duplicates-from-sorted-array-ii	Medium
0088-merge-sorted-array	Easy
0169-majority-element	Easy
0209-minimum-size-subarray-sum	Medium
0268-missing-number	Easy
0283-move-zeroes	Easy
0303-range-sum-query-immutable	Easy
0322-coin-change	Medium
0448-find-all-numbers-disappeared-in-an-array	Easy
0643-maximum-average-subarray-i	Easy
0713-subarray-product-less-than-k	Medium
0744-find-smallest-letter-greater-than-target	Easy
0746-min-cost-climbing-stairs	Easy
0881-boats-to-save-people	Medium
1091-shortest-path-in-binary-matrix	Medium
2022-convert-1d-array-into-2d-array	Easy

Sliding Window

Problem Name	Difficulty
0003-longest-substring-without-repeating-characters	Medium
0209-minimum-size-subarray-sum	Medium
0643-maximum-average-subarray-i	Easy
0713-subarray-product-less-than-k	Medium

Two Pointers

Problem Name	Difficulty
0011-container-with-most-water	Medium
0015-3sum	Medium
0026-remove-duplicates-from-sorted-array	Easy
0027-remove-element	Easy
0080-remove-duplicates-from-sorted-array-ii	Medium
0088-merge-sorted-array	Easy
0125-valid-palindrome	Easy
0141-linked-list-cycle	Easy
0234-palindrome-linked-list	Easy
0283-move-zeroes	Easy
0392-is-subsequence	Easy
0844-backspace-string-compare	Easy
0876-middle-of-the-linked-list	Easy
0881-boats-to-save-people	Medium

String

Problem Name	Difficulty
0003-longest-substring-without-repeating-characters	Medium
0125-valid-palindrome	Easy
0242-valid-anagram	Easy
0257-binary-tree-paths	Easy
0392-is-subsequence	Easy
0844-backspace-string-compare	Easy

Dynamic Programming

Problem Name	Difficulty
0062-unique-paths	Medium
0064-minimum-path-sum	Medium
0070-climbing-stairs	Easy
0322-coin-change	Medium
0392-is-subsequence	Easy
0746-min-cost-climbing-stairs	Easy

Stack

Problem Name	Difficulty
0234-palindrome-linked-list	Easy
0844-backspace-string-compare	Easy

Simulation

Problem Name	Difficulty
0844-backspace-string-compare	Easy
2022-convert-1d-array-into-2d-array	Easy

Hash Table

Problem Name	Difficulty
0001-two-sum	Easy
0003-longest-substring-without-repeating-characters	Medium
0141-linked-list-cycle	Easy
0169-majority-element	Easy
0242-valid-anagram	Easy
0268-missing-number	Easy
0448-find-all-numbers-disappeared-in-an-array	Easy

Math

Problem Name	Difficulty
0007-reverse-integer	Medium
0009-palindrome-number	Easy
0062-unique-paths	Medium
0070-climbing-stairs	Easy
0268-missing-number	Easy

Binary Search

Problem Name	Difficulty
0033-search-in-rotated-sorted-array	Medium
0209-minimum-size-subarray-sum	Medium
0268-missing-number	Easy
0713-subarray-product-less-than-k	Medium
0744-find-smallest-letter-greater-than-target	Easy

Bit Manipulation

Problem Name	Difficulty
0268-missing-number	Easy

Sorting

Problem Name	Difficulty
0015-3sum	Medium
0088-merge-sorted-array	Easy
0169-majority-element	Easy
0242-valid-anagram	Easy
0268-missing-number	Easy
0881-boats-to-save-people	Medium

Divide and Conquer

Problem Name	Difficulty
0169-majority-element	Easy

Counting

Problem Name	Difficulty
0169-majority-element	Easy

Boyer–Moore Majority Vote Algorithm

Problem Name	Difficulty
0169-majority-element	Easy

Prefix Sum

Problem Name	Difficulty
0209-minimum-size-subarray-sum	Medium
0303-range-sum-query-immutable	Easy
0713-subarray-product-less-than-k	Medium

Linked List

Problem Name	Difficulty
0021-merge-two-sorted-lists	Easy
0083-remove-duplicates-from-sorted-list	Easy
0141-linked-list-cycle	Easy
0203-remove-linked-list-elements	Easy
0206-reverse-linked-list	Easy
0234-palindrome-linked-list	Easy
0876-middle-of-the-linked-list	Easy

Floyd's Cycle Finding Algorithm

Problem Name	Difficulty
0141-linked-list-cycle	Easy

Recursion

Problem Name	Difficulty
0021-merge-two-sorted-lists	Easy
0203-remove-linked-list-elements	Easy
0206-reverse-linked-list	Easy
0234-palindrome-linked-list	Easy

Breadth-First Search

Problem Name	Difficulty
0100-same-tree	Easy
0111-minimum-depth-of-binary-tree	Easy
0112-path-sum	Easy
0226-invert-binary-tree	Easy
0322-coin-change	Medium
0617-merge-two-binary-trees	Easy
0637-average-of-levels-in-binary-tree	Easy
1091-shortest-path-in-binary-matrix	Medium

Knapsack Problem

Problem Name	Difficulty
0322-coin-change	Medium

Complete Knapsack

Problem Name	Difficulty
0322-coin-change	Medium

Memoization

Problem Name	Difficulty
0070-climbing-stairs	Easy

Combinatorics

Problem Name	Difficulty
0062-unique-paths	Medium

Matrix

Problem Name	Difficulty
0064-minimum-path-sum	Medium
1091-shortest-path-in-binary-matrix	Medium
2022-convert-1d-array-into-2d-array	Easy

Greedy

Problem Name	Difficulty
0011-container-with-most-water	Medium
0881-boats-to-save-people	Medium

Tree

Problem Name	Difficulty
0100-same-tree	Easy
0111-minimum-depth-of-binary-tree	Easy
0112-path-sum	Easy
0226-invert-binary-tree	Easy
0257-binary-tree-paths	Easy
0572-subtree-of-another-tree	Easy
0617-merge-two-binary-trees	Easy
0637-average-of-levels-in-binary-tree	Easy

Depth-First Search

Problem Name	Difficulty
0100-same-tree	Easy
0111-minimum-depth-of-binary-tree	Easy
0112-path-sum	Easy
0226-invert-binary-tree	Easy
0257-binary-tree-paths	Easy
0572-subtree-of-another-tree	Easy
0617-merge-two-binary-trees	Easy
0637-average-of-levels-in-binary-tree	Easy

Binary Tree

Problem Name	Difficulty
0100-same-tree	Easy
0111-minimum-depth-of-binary-tree	Easy
0112-path-sum	Easy
0226-invert-binary-tree	Easy
0257-binary-tree-paths	Easy
0572-subtree-of-another-tree	Easy
0617-merge-two-binary-trees	Easy
0637-average-of-levels-in-binary-tree	Easy

String Matching

Problem Name	Difficulty
0572-subtree-of-another-tree	Easy

Hash Function

Problem Name	Difficulty
0572-subtree-of-another-tree	Easy

Backtracking

Problem Name	Difficulty
0257-binary-tree-paths	Easy

Design

Problem Name	Difficulty
0303-range-sum-query-immutable	Easy

Timsort

Problem Name	Difficulty
0881-boats-to-save-people	Medium

Name		Name	Last commit message	Last commit date
0001-two-sum		0001-two-sum
0003-longest-substring-without-repeating-characters		0003-longest-substring-without-repeating-characters
0005-longest-palindromic-substring		0005-longest-palindromic-substring
0007-reverse-integer		0007-reverse-integer
0009-palindrome-number		0009-palindrome-number
0011-container-with-most-water		0011-container-with-most-water
0015-3sum		0015-3sum
0019-remove-nth-node-from-end-of-list		0019-remove-nth-node-from-end-of-list
0020-valid-parentheses		0020-valid-parentheses
0021-merge-two-sorted-lists		0021-merge-two-sorted-lists
0023-merge-k-sorted-lists		0023-merge-k-sorted-lists
0026-remove-duplicates-from-sorted-array		0026-remove-duplicates-from-sorted-array
0027-remove-element		0027-remove-element
0033-search-in-rotated-sorted-array		0033-search-in-rotated-sorted-array
0035-search-insert-position		0035-search-insert-position
0039-combination-sum		0039-combination-sum
0042-trapping-rain-water		0042-trapping-rain-water
0048-rotate-image		0048-rotate-image
0049-group-anagrams		0049-group-anagrams
0053-maximum-subarray		0053-maximum-subarray
0054-spiral-matrix		0054-spiral-matrix
0055-jump-game		0055-jump-game
0056-merge-intervals		0056-merge-intervals
0057-insert-interval		0057-insert-interval
0062-unique-paths		0062-unique-paths
0064-minimum-path-sum		0064-minimum-path-sum
0070-climbing-stairs		0070-climbing-stairs
0073-set-matrix-zeroes		0073-set-matrix-zeroes
0076-minimum-window-substring		0076-minimum-window-substring
0079-word-search		0079-word-search
0080-remove-duplicates-from-sorted-array-ii		0080-remove-duplicates-from-sorted-array-ii
0083-remove-duplicates-from-sorted-list		0083-remove-duplicates-from-sorted-list
0088-merge-sorted-array		0088-merge-sorted-array
0091-decode-ways		0091-decode-ways
0098-validate-binary-search-tree		0098-validate-binary-search-tree
0100-same-tree		0100-same-tree
0102-binary-tree-level-order-traversal		0102-binary-tree-level-order-traversal
0104-maximum-depth-of-binary-tree		0104-maximum-depth-of-binary-tree
0105-construct-binary-tree-from-preorder-and-inorder-traversal		0105-construct-binary-tree-from-preorder-and-inorder-traversal
0111-minimum-depth-of-binary-tree		0111-minimum-depth-of-binary-tree
0112-path-sum		0112-path-sum
0121-best-time-to-buy-and-sell-stock		0121-best-time-to-buy-and-sell-stock
0124-binary-tree-maximum-path-sum		0124-binary-tree-maximum-path-sum
0125-valid-palindrome		0125-valid-palindrome
0128-longest-consecutive-sequence		0128-longest-consecutive-sequence
0133-clone-graph		0133-clone-graph
0136-single-number		0136-single-number
0139-word-break		0139-word-break
0141-linked-list-cycle		0141-linked-list-cycle
0143-reorder-list		0143-reorder-list
0151-reverse-words-in-a-string		0151-reverse-words-in-a-string
0153-find-minimum-in-rotated-sorted-array		0153-find-minimum-in-rotated-sorted-array
0167-two-sum-ii-input-array-is-sorted		0167-two-sum-ii-input-array-is-sorted
0169-majority-element		0169-majority-element
0189-rotate-array		0189-rotate-array
0190-reverse-bits		0190-reverse-bits
0191-number-of-1-bits		0191-number-of-1-bits
0198-house-robber		0198-house-robber
0200-number-of-islands		0200-number-of-islands
0203-remove-linked-list-elements		0203-remove-linked-list-elements
0206-reverse-linked-list		0206-reverse-linked-list
0207-course-schedule		0207-course-schedule
0208-implement-trie-prefix-tree		0208-implement-trie-prefix-tree
0209-minimum-size-subarray-sum		0209-minimum-size-subarray-sum
0211-design-add-and-search-words-data-structure		0211-design-add-and-search-words-data-structure
0212-word-search-ii		0212-word-search-ii
0213-house-robber-ii		0213-house-robber-ii
0217-contains-duplicate		0217-contains-duplicate
0226-invert-binary-tree		0226-invert-binary-tree
0230-kth-smallest-element-in-a-bst		0230-kth-smallest-element-in-a-bst
0234-palindrome-linked-list		0234-palindrome-linked-list
0235-lowest-common-ancestor-of-a-binary-search-tree		0235-lowest-common-ancestor-of-a-binary-search-tree
0238-product-of-array-except-self		0238-product-of-array-except-self
0242-valid-anagram		0242-valid-anagram
0257-binary-tree-paths		0257-binary-tree-paths
0268-missing-number		0268-missing-number
0278-first-bad-version		0278-first-bad-version
0283-move-zeroes		0283-move-zeroes
0295-find-median-from-data-stream		0295-find-median-from-data-stream
0297-serialize-and-deserialize-binary-tree		0297-serialize-and-deserialize-binary-tree
0300-longest-increasing-subsequence		0300-longest-increasing-subsequence
0303-range-sum-query-immutable		0303-range-sum-query-immutable
0322-coin-change		0322-coin-change
0338-counting-bits		0338-counting-bits
0347-top-k-frequent-elements		0347-top-k-frequent-elements
0371-sum-of-two-integers		0371-sum-of-two-integers
0374-guess-number-higher-or-lower		0374-guess-number-higher-or-lower
0392-is-subsequence		0392-is-subsequence
0417-pacific-atlantic-water-flow		0417-pacific-atlantic-water-flow
0424-longest-repeating-character-replacement		0424-longest-repeating-character-replacement
0435-non-overlapping-intervals		0435-non-overlapping-intervals
0448-find-all-numbers-disappeared-in-an-array		0448-find-all-numbers-disappeared-in-an-array
0543-diameter-of-binary-tree		0543-diameter-of-binary-tree
0572-subtree-of-another-tree		0572-subtree-of-another-tree
0617-merge-two-binary-trees		0617-merge-two-binary-trees
0637-average-of-levels-in-binary-tree		0637-average-of-levels-in-binary-tree
0639-decode-ways-ii		0639-decode-ways-ii
0643-maximum-average-subarray-i		0643-maximum-average-subarray-i
0647-palindromic-substrings		0647-palindromic-substrings
0704-binary-search		0704-binary-search

Latest commit

History

Folders and files

Repository files navigation