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Apr 17, 2025

100 stories

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LeetCode Notes

LeetCode solutions and explanation

John Lu

·

Nov 1, 2022

LeetCode 1854. Maximum Population Year

LeetCode Notes [1]

LeetCode 1854. Maximum Population Year

John Lu

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Nov 2, 2022

LeetCode 1844. Replace All Digits with Characters

LeetCode Notes [2]

John Lu

·

Nov 3, 2022

LeetCode 303. Range Sum Query — Immutable

LeetCode Notes [3]

John Lu

·

Nov 4, 2022

LeetCode 307. Range Sum Query — Mutable

LeetCode Notes [4]

John Lu

·

Nov 5, 2022

LeetCode 848. Shifting Letters

LeetCode Notes [5]

LeetCode 848. Shifting Letters

John Lu

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Nov 6, 2022

LeetCode 2381. Shifting Letters II

LeetCode Notes [6]

LeetCode 2381. Shifting Letters II

John Lu

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Nov 7, 2022

LeetCode 1943. Describe the Painting

LeetCode Notes [7]

LeetCode 1943. Describe the Painting

John Lu

·

Nov 8, 2022

LeetCode 218. The Skyline Problem

LeetCode Notes [8]

John Lu

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Nov 13, 2022

LeetCode 699. Falling Squares

LeetCode Notes [9]

John Lu

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Nov 13, 2022

LeetCode 9. Palindrome Number

LeetCode Notes [10]

John Lu

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Nov 15, 2022

LeetCode 234. Palindrome Linked List

LeetCode Notes [11]

John Lu

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Nov 16, 2022

LeetCode 125. Valid Palindrome

LeetCode Notes [12]

John Lu

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Nov 16, 2022

LeetCode 2108. Find First Palindromic String in the Array

LeetCode Notes [13]

John Lu

·

Nov 17, 2022

LeetCode 680. Valid Palindrome II

LeetCode Notes [14]

John Lu

·

Nov 18, 2022

LeetCode 206. Reverse Linked List

LeetCode Notes [15]

LeetCode 206. Reverse Linked List

John Lu

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Nov 20, 2022

LeetCode 876. Middle of the Linked List

LeetCode Notes [16]

John Lu

·

Nov 21, 2022

LeetCode 509. Fibonacci Number

LeetCode Notes [17]

LeetCode 509. Fibonacci Number

John Lu

·

Nov 21, 2022

LeetCode 70. Climbing Stairs

LeetCode Notes [18]

John Lu

·

Dec 11, 2022

LeetCode 207. Course Schedule

LeetCode Notes [19]

John Lu

·

Dec 11, 2022

LeetCode 1. Two Sum

LeetCode Notes [20]

LeetCode 1. Two Sum