LeetCode

2023-09-09

[LeetCode] 509. Fibonacci Number (Python)

python, algorithms, math, dp, recursion, memoization

python algorithms math

LeetCode

2023-09-03

[LeetCode] 455. Assign Cookies (Python)

python, algorithms, array, two-pointers, greedy, sorting

python algorithms array

LeetCode

2023-09-03

[LeetCode] 406. Queue Reconstruction by Height (Python)

python, algorithms, array, greedy, sorting

python algorithms array

LeetCode

2023-09-03

[LeetCode] 134. Gas Station (Python)

python, algorithms, array, greedy

python algorithms array

LeetCode

2023-09-03

[LeetCode] 122. Best Time to Buy and Sell Stock II (Python)

python, algorithms, array, dp, greedy

python algorithms array

LeetCode

2023-08-27

[LeetCode] 76. Minimum Window Substring (Python)

python, algorithms, hash-table, string, sliding-window

python algorithms hash-table

LeetCode

2023-08-27

[LeetCode] 424. Longest Repeating Character Replacement (Python)

python, algorithms, hash-table, string, sliding-window

python algorithms hash-table

LeetCode

2023-08-27

[LeetCode] 239. Sliding Window Maximum (Python)

python, algorithms, array, queue, sliding-window, heap, priority-queue, monotonic-queue

python algorithms array

LeetCode

2023-08-19

[LeetCode] 461. Hamming Distance (Python)

python, algorithms, bit-manipulation

python algorithms bit-manipulation

LeetCode

2023-08-19

[LeetCode] 191. Number of 1 Bits (Python)

python, algorithms, divide-and-conquer, bit-manipulation

python algorithms divide-and-conquer

LeetCode

2023-08-19

[LeetCode] 371. Sum of Two Integers (Python)

python, algorithms, math, bit-manipulation

python algorithms math

LeetCode

2023-08-19

[LeetCode] 136. Single Number (Python)

python, algorithms, array, bit-manipulation

python algorithms array

LeetCode

2023-08-12

[LeetCode] 704. Binary Search (Python)

python, algorithms, array, binary-search

python algorithms array

LeetCode

2023-08-12

[LeetCode] 349. Intersection of Two Arrays (Python)

python, algorithms, array, hash-table, two-pointers, binary-search, sorting

python algorithms array

LeetCode

2023-08-12

[LeetCode] 33. Search in Rotated Sorted Array (Python)

python, algorithms, array, binary-search

python algorithms array

LeetCode

2023-08-12

[LeetCode] 240. Search a 2D Matrix II (Python)

python, algorithms, array, binary-search, divide-and-conquer, matrix

python algorithms array

LeetCode

2023-08-12

[LeetCode] 167. Two Sum II - Input Array Is Sorted (Python)

python, algorithms, array, two-pointers, binary-search

python algorithms array

LeetCode

2023-08-05

[LeetCode] 973. K Closest Points to Origin (Python)

python, algorithms, array, math, divide-and-conquer, geometry, sorting, heap, priority-queue, quick-select

python algorithms array

LeetCode

2023-08-05

[LeetCode] 75. Sort Colors (Python)

python, algorithms, array, two-pointers, sorting, dnf

python algorithms array

LeetCode

2023-08-05

[LeetCode] 242. Valid Anagram (Python)

python, algorithms, hash-table, string, sorting

python algorithms hash-table

LeetCode

2023-08-05

[LeetCode] 179. Largest Number (Python)

python, algorithms, array, string, greedy, sorting

python algorithms array

LeetCode

2023-07-29

[LeetCode] 56. Merge Intervals (Python)

python, algorithms, array, sorting

python algorithms array

LeetCode

2023-07-29

[LeetCode] 148. Sort List (Python)

python, algorithms, linked-list, two-pointers, divide-and-conquer, sorting, merge-sort

python algorithms linked-list

LeetCode

2023-07-29

[LeetCode] 147. Insertion Sort List (Python)

python, algorithms, linked-list, sorting

python algorithms linked-list

LeetCode

2023-07-22

[LeetCode] 215. Kth Largest Element in an Array (Python)

python, algorithms, array, divide-and-conquer, sorting, heap, quick-select

python algorithms array

LeetCode

2023-07-22

[LeetCode] 208. Implement Trie (Prefix Tree) (Python)

python, algorithms, hash-table, string, design, trie

python algorithms hash-table

LeetCode

2023-07-22

[LeetCode] 105. Construct Binary Tree from Preorder and Inorder Traversal (Python)

python, algorithms, array, hash-table, divide-and-conquer, tree, binary-tree

python algorithms array

LeetCode

2023-07-16

[LeetCode] 938. Range Sum of BST (Python)

tree, dfs, binary-search-tree, binary-tree

python tree dfs

LeetCode

2023-07-16

[LeetCode] 783. Minimum Distance Between BST Nodes (Python)

tree, dfs, bfs, binary-search-tree, binary-tree

python tree dfs

LeetCode

2023-07-16

[LeetCode] 1038. Binary Search Tree to Greater Sum Tree (Python)

tree, dfs, binary-search-tree, binary-tree

python tree dfs

LeetCode

2023-07-15

[LeetCode] 310. Minimum Height Trees (Python)

bfs, dfs, graph

python bfs dfs

LeetCode

2023-07-15

[LeetCode] 110. Balanced Binary Tree (Python)

tree, dfs, binary-tree

python tree dfs

LeetCode

2023-07-15

[LeetCode] 108. Convert Sorted Array to Binary Search Tree (Python)

tree, binary-search-tree, binary-tree

python tree binary-search-tree

LeetCode

2023-07-14

[LeetCode] 617. Merge Two Binary Trees (Python)

tree, dfs, bfs, binary-tree

python tree dfs

LeetCode

2023-07-05

[LeetCode] 226. Invert Binary Tree (Python)

graph, dfs, bfs, binary-tree

python graph dfs

LeetCode

2023-07-04

[LeetCode] 687. Longest Univalue Path (Python)

graph, dfs, binary-tree

python graph dfs

LeetCode

2023-07-03

[LeetCode] 543. Diameter of Binary Tree (Python)

graph, dfs, binary-tree

python graph dfs

LeetCode

2023-07-01

[LeetCode] 104. Maximum Depth of Binary Tree (Python)

graph, bfs, binary-tree

python graph bfs

LeetCode

2023-06-24

[LeetCode] 78. Subsets (Python)

array, back-tracking, dfs

python back-tracking dfs

LeetCode

2023-06-24

[LeetCode] 332. Reconstruct Itinerary (Python)

graph, dfs

python graph dfs

LeetCode

2023-06-24

[LeetCode] 207. Course Schedule (Python)

graph, bfs, dfs

python graph bfs

LeetCode

2023-06-17

[LeetCode] 77. Combinations (Python)

back-tracking, combination

python back-tracking combination

LeetCode

2023-06-17

[LeetCode] 46. Permutations (Python)

array, back-tracking, permutation

python array back-tracking

LeetCode

2023-06-17

[LeetCode] 39. Combination Sum (Python)

array, back-tracking

python array back-tracking

LeetCode

2023-06-17

[LeetCode] 200. Number of Islands (Python)

array, dfs, bfs, union-find

python array dfs

LeetCode

2023-06-17

[LeetCode] 17. Letter Combinations of a Phone Number (Python)

hash-table, string, back-tracking

python hash-table string

LeetCode

2023-06-10

[LeetCode] 771. Jewels and Stones (Python)

hash-table, string

python hash-table string

LeetCode

2023-06-10

[LeetCode] 706. Design HashMap (Python)

array, hash-table, linked-list, design, hash-function

python array hash-table

LeetCode

2023-06-10

[LeetCode] 641. Design Circular Deque (Python)

array, linked-list, design, queue

python array linked-list

LeetCode

2023-06-10

[LeetCode] 347. Top K Frequent Elements (Python)

array, hash-table, sorting, counter

python array hash-table

LeetCode

2023-06-10

[LeetCode] 3. Longest Substring Without Repeating Characters (Python)

hash-table, string, sliding-window

python hash-table string

LeetCode

2023-06-10

[LeetCode] 23. Merge k Sorted Lists (Python)

linked-list, divide-and-conquer, priority-queue, merge-sort

python linked-list divide-and-conquer

LeetCode

2023-06-03

[LeetCode] 225. Implement Stack using Queues (Python)

stack, design, queue

python stack design

LeetCode

2023-06-03

[LeetCode] 20. Valid Parentheses (Python)

string, stack

python string stack

LeetCode

2023-05-20

[LeetCode] 561. Array Partition (Python)

array, greedy, sorting, counting-sort

python array greedy

LeetCode

2023-05-20

[LeetCode] 42. Trapping Rain Water (Python)

array, two-pointers, dp, stack

python array two-pointers

LeetCode

2023-05-20

[LeetCode] 238. Product of Array Except Self (Python)

array, prefix-sum

python array prefix-sum

LeetCode

2023-05-20

[LeetCode] 15. 3Sum (Python)

array, two-pointers, sorting

python array two-pointers

LeetCode

2023-05-13

[LeetCode] 937. Reorder Data in Log Files (Python)

array, string, sorting

python array string

LeetCode

2023-05-13

[LeetCode] 819. Most Common Word (Python)

hash-table, string, counting

python hash-table string

LeetCode

2023-05-13

[LeetCode] 5. Longest Palindromic Substring (Python)

string, dp, two-pointers

python string dp

LeetCode

2023-05-13

[LeetCode] 49. Group Anagrams (Python)

array, hash-table, string, sorting

python array hash-table

LeetCode

2023-04-29

[LeetCode] 344. Reverse String (Python)

two-pointers, string

python two-pointers string

LeetCode

2023-04-29

[LeetCode] 125. Valid Palindrome (Python)

two-pointers, string

python two-pointers string

LeetCode

2023-03-24

[LeetCode] 1. Two Sum (Python)

python, array, hash-table

python array hash-table

LeetCode

2023-03-23

[LeetCode] 141. Linked List Cycle (Python)

python, hash-table, linked-list, two-pointers

python hash-table linked-list

LeetCode

2023-03-22

[LeetCode] 234. Palindrome Linked List (Python)

python, linked-list, two-pointers, stack, recursion

python linked-list two-pointers

LeetCode

2023-03-21

[LeetCode] 70. Climbing Stairs (Python)

python, math, dp, memorization

python math dp

LeetCode

2023-03-20

[LeetCode] 160. Intersection of Two Linked Lists (Python)

python, hash-table, linked-list, two-pointers

python hash-table linked-list

LeetCode

2023-03-17

[LeetCode] 101. Symmetric Tree (Python)

python, tree, dfs, bfs, binary-tree

python tree dfs

LeetCode

2023-03-16

[LeetCode] 121. Best Time to Buy and Sell Stock (Python)

python, dp

python dp

LeetCode

2023-03-15

[LeetCode] 543. Diameter of Binary Tree (Python)

python, tree, dfs, binary-tree

python tree dfs

LeetCode

2023-03-14

[LeetCode] 13. Roman to Integer (Python)

python, hash-table, math, string

python hash-table math

LeetCode

2023-03-13

[LeetCode] 283. Move Zeroes (Python)

python, array, two-pointers

python array two-pointers

LeetCode

2023-03-12

[LeetCode] 1313. Decompress Run-Length Encoded List (Python)

python, algorithms, array

python algorithms array

LeetCode

2023-03-10

[LeetCode] 21. Merge Two Sorted Lists (Python)

python, algorithms, linked-list, recursion

python algorithms linked-list

LeetCode

2023-03-09

[LeetCode] 169. Majority Element (Python)

python, algorithms, array, hash-table, divide-and-conquer, sorting, counting

python algorithms array

LeetCode

2023-03-08

[LeetCode] 118. Pascal’s Triangle (Python)

python, algorithms, array, dp

python algorithms array

LeetCode

2023-03-07

[LeetCode] 136. Single Number (Python)

python, algorithms, array, bit-manipulation

python algorithms array

LeetCode

2023-03-06

[LeetCode] 206. Reverse Linked List (Python)

python, algorithms, linked-list, recursion

python algorithms linked-list

LeetCode

2023-03-05

[LeetCode] 1379. Find a Corresponding Node of a Binary Tree in a Clone of That Tree (Python)

python, algorithms, tree, dfs, bfs, binary-tree

python algorithms tree

LeetCode

2023-03-04

[LeetCode] 2574. Left and Right Sum Differences (Python)

python, algorithms, array, prefix-sum

python algorithms array

LeetCode

2023-03-03

[LeetCode] 94. Binary Tree Inorder Traversal (Python)

python, algorithms, stack, tree ,dfs, binary-tree

python algorithms stack

LeetCode

2023-03-02

[LeetCode] 104. Maximum Depth of Binary Tree (Python)

python, algorithms, tree, dfs, bfs, binary-tree

python algorithms tree

LeetCode

2023-02-22

[LeetCode] 35. Search Insert Position (Java)

array, binary-search

java algorithms array

LeetCode

2023-02-22

[LeetCode] 226. Invert Binary Tree (Java)

tree, depth-first-search, breadth-first-search, binary-tree

java algorithms tree

LeetCode

2023-02-08

[LeetCode] 763. Partition Labels (Java)

Partition Labels

algorithms

LeetCode

2023-01-25

[LeetCode] 2413. Smallest Even Multiple (Java)

Smallest Even Multiple

algorithms

LeetCode

2023-01-24

[LeetCode] 2535. Difference Between Element Sum and Digit Sum of an Array (Java)

Difference Between Element Sum and Digit Sum of an Array

algorithms

LeetCode

2023-01-23

[LeetCode] 2469. Convert the Temperature (Java)

Convert the Temperature

algorithms

LeetCode

2023-01-18

[LeetCode] 83. Remove Duplicates from Sorted List (Java)

Remove Duplicates from Sorted List

algorithms

LeetCode

2023-01-18

[LeetCode] 7. Reverse Integer (Java)

Reverse Integer

algorithms

LeetCode

2023-01-18

[LeetCode] 1. Two Sum (Java)

Two Sum

algorithms

LeetCode

2022-08-23

[LeetCode] 1773. Count Items Matching a Rule (Java)

Count Items Matching a Rule

algorithms

LeetCode

2022-08-22

[LeetCode] 1859. Sorting the Sentence (Java)

Sorting the Sentence

algorithms

LeetCode

2022-08-21

[LeetCode] 1221. Split a String in Balanced Strings (Java)

Split a String in Balanced Strings

algorithms

LeetCode

2022-08-20

[LeetCode] 1528. Shuffle String (Java)

Shuffle String

algorithms

LeetCode

2022-08-19

[LeetCode] 1342. Number of Steps to Reduce a Number to Zero (Java)

Number of Steps to Reduce a Number to Zero

algorithms

LeetCode

2022-08-18

[LeetCode] 1720. Decode XORed Array (Java)

Decode XORed Array

algorithms

LeetCode

2022-08-17

[LeetCode] 1678. Goal Parser Interpretation (Java)

Goal Parser Interpretation

algorithms

LeetCode

2022-08-16

[LeetCode] 1365. How Many Numbers Are Smaller Than the Current Number (Java)

How Many Numbers Are Smaller Than the Current Number

algorithms

LeetCode

2022-08-15

[LeetCode] 1281. Subtract the Product and Sum of Digits of an Integer (Java)

Subtract the Product and Sum of Digits of an Integer

algorithms

LeetCode

2022-08-14

[LeetCode] 1431. Kids With the Greatest Number of Candies (Java)

Kids With the Greatest Number of Candies

algorithms

LeetCode

2022-08-13

[LeetCode] 1603. Design Parking System (Java)

Design Parking System

algorithms

LeetCode

2022-08-12

[LeetCode] 771. Jewels and Stones (Java)

Jewels and Stones

algorithms

LeetCode

2022-08-11

[LeetCode] 1512. Number of Good Pairs (Java)

Number of Good Pairs

algorithms

LeetCode

2022-08-10

[LeetCode] 2160. Minimum Sum of Four Digit Number After Splitting Digits (Java)

Minimum Sum of Four Digit Number After Splitting Digits

algorithms

LeetCode

2022-08-09

[LeetCode] 2114. Maximum Number of Words Found in Sentences (Java)

Maximum Number of Words Found in Sentences

algorithms

LeetCode

2022-08-08

[LeetCode] 1470. Shuffle the Array (Java)

Shuffle the Array

algorithms

LeetCode

2022-08-07

[LeetCode] 1672. Richest Customer Wealth (Java)

Richest Customer Wealth

algorithms

LeetCode

2022-08-06

[LeetCode] 2011. Final Value of Variable After Performing Operations (Java)

Final Value of Variable After Performing Operations

algorithms

LeetCode

2022-08-05

[LeetCode] 1108. Defanging an IP Address (Java)

Defanging an IP Address

algorithms

LeetCode

2022-07-06

[LeetCode] 1480. Running Sum of 1d Array (Java)

Running Sum of 1d Array

algorithms

LeetCode

2022-05-22

[LeetCode] 1119. Remove Vowels from a String (Java)

Remove Vowels from a String

algorithms

LeetCode

2022-05-21

[LeetCode] 1920. Build Array from Permutation (Java)

Build Array from Permutation

algorithms

LeetCode

2022-05-20

[LeetCode] 1929. Concatenation of Array (Java)

Concatenation of Array

algorithms

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