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Language Learning › Learn Sindarin › Sindarin Lessons ›

Supplement 4: Graded Reading Practice

How to Use This Supplement This supplement contains graded Sindarin reading passages arranged from beginner to advanced level. Each passage is: Presented in Sindarin first, without any translation Followed by a complete word-by-word gloss (morpheme-by-morpheme analysis) Followed by grammatical notes explaining the constructions Followed by cultural and narrative commentary The Right Way to Use These Passages Step 1 — Attempt cold: Read the passage in Sindarin first, without looking at...
sindarin reading practice texts all-levels May 30, 2026
Practice › LeetCode ›

LeetCode 06xx

LeetCode 06xx # Problem Difficulty Time Notes 600 Non-negative Integers without Consecutive Ones 🔴 Hard 2m 16s That is a long-form technical guide request with multiple required … 601 Human Traffic of Stadium 🔴 Hard 1m 42s The problem asks us to extract all consecutive records from a Stadi… 602 Friend Requests II: Who Has the Most Friends 🟡 Medium 1m 10s The problem gives us a database table named...
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Practice › LeetCode ›

LeetCode 35xx

LeetCode 35xx # Problem Difficulty Time Notes 3500 Minimum Cost to Divide Array Into Subarrays 🔴 Hard 46s This problem asks us to partition an array nums into contiguous sub… 3501 Maximize Active Section with Trade II 🔴 Hard 47s The problem presents a binary string s where each character represe… 3503 Longest Palindrome After Substring Concatenation I 🟡 Medium 1m 42s We are given two strings, s and t,...
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Practice › LeetCode ›

LeetCode 30xx

LeetCode 30xx # Problem Difficulty Time Notes 3000 Maximum Area of Longest Diagonal Rectangle 🟢 Easy 57s The input consists of a 2D array dimensions, where each element rep… 3001 Minimum Moves to Capture The Queen 🟡 Medium 1m 11s This problem gives us the positions of three chess pieces on a stan… 3002 Maximum Size of a Set After Removals 🟡 Medium 57s The problem is asking us to...
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Practice › LeetCode ›

LeetCode 27xx

LeetCode 27xx # Problem Difficulty Time Notes 2700 Differences Between Two Objects 🟡 Medium 50s That is a long-form reference document with multiple substantial se… 2701 Consecutive Transactions with Increasing Amounts 🔴 Hard 1m 5s Before I generate it, there is one important issue to resolve: Leet… 2702 Minimum Operations to Make Numbers Non-positive 🔴 Hard 1m 46s In this problem, we are given an array nums and two integers...
leetcode algorithms practice
Practice › LeetCode › LeetCode (archived) ›

LeetCode 08xx

LeetCode 08xx # Title Difficulty Description 800 LeetCode 800: Similar RGB Color Easy A clear explanation of finding the closest shorthand RGB color by rounding each color channel to the nearest repeated hexadecimal pair. 801 LeetCode 801: Minimum Swaps To Make Sequences Increasing Medium A dynamic programming solution for finding the minimum number of same-index swaps needed to make two arrays strictly increasing. 802 LeetCode 802: Find Eventual Safe States...
leetcode algorithms practice
Practice › LeetCode › LeetCode (archived) ›

LeetCode 02xx

LeetCode 02xx # Title Difficulty Description 200 LeetCode 200: Number of Islands Medium A clear explanation of counting connected groups of land cells in a grid using DFS or BFS. 201 LeetCode 201: Bitwise AND of Numbers Range Medium A clear explanation of finding the bitwise AND of every number in an inclusive range using the common binary prefix. 202 LeetCode 202: Happy Number Easy A clear explanation of detecting...
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Practice › LeetCode ›

LeetCode 02xx

LeetCode 02xx # Problem Difficulty Time Notes 200 Number of Islands 🟡 Medium 10m 21s The problem gives us a two dimensional grid where each cell contain… 201 Bitwise AND of Numbers Range 🟡 Medium 1m 28s The problem asks us to compute the bitwise AND of every integer in … 202 Happy Number 🟢 Easy 1m 19s This problem asks us to determine whether a given positive integer …...
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Practice › LeetCode ›

LeetCode 10xx

LeetCode 10xx # Problem Difficulty Time Notes 1000 Minimum Cost to Merge Stones 🔴 Hard 1m 29s The problem asks us to merge n piles of stones into a single pile u… 1001 Grid Illumination 🔴 Hard 4m 29s This problem models a very large chessboard-like grid where certain… 1002 Find Common Characters 🟢 Easy 3m 8s The problem gives us an array of lowercase strings called words. We… 1003...
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Practice › LeetCode ›

LeetCode 19xx

LeetCode 19xx # Problem Difficulty Time Notes 1900 The Earliest and Latest Rounds Where Players Compete 🔴 Hard 1m 40s The tournament is organized as a sequence of elimination rounds. In… 1901 Find a Peak Element II 🟡 Medium 43s The problem requires finding a peak element in a 2D matrix. A peak … 1902 Depth of BST Given Insertion Order 🟡 Medium 1m 24s The problem gives us an...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 09xx

LeetCode 09xx # Problem Difficulty Time Notes 900 RLE Iterator 🟡 Medium 1m 12s This problem asks us to design an iterator over a run-length encode… 901 Online Stock Span 🟡 Medium 1m The problem asks us to design a class that processes stock prices o… 902 Numbers At Most N Given Digit Set 🔴 Hard 1m 17s The problem gives us a set of allowed digits, stored as strings,...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 18xx

LeetCode 18xx # Problem Difficulty Time Notes 1800 Maximum Ascending Subarray Sum 🟢 Easy 1m 19s The problem gives an array of positive integers called nums. We mus… 1801 Number of Orders in the Backlog 🟡 Medium 1m 45s This problem simulates a simplified stock exchange order book. Each… 1802 Maximum Value at a Given Index in a Bounded Array 🟡 Medium 1m 26s This problem asks us to construct...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 32xx

LeetCode 32xx # Problem Difficulty Time Notes 3200 Maximum Height of a Triangle 🟢 Easy 1m 13s The problem gives us two integers, red and blue, representing the n… 3201 Find the Maximum Length of Valid Subsequence I 🟡 Medium 1m 41s The problem asks us to find the longest subsequence in an integer a… 3202 Find the Maximum Length of Valid Subsequence II 🟡 Medium 54s This problem asks...
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Practice › LeetCode ›

LeetCode 01xx

LeetCode 01xx # Problem Difficulty Time Notes 100 Same Tree 🟢 Easy 1m 39s The problem asks us to determine whether two binary trees are exact… 101 Symmetric Tree 🟢 Easy 1m 25s The problem asks us to determine whether a binary tree is symmetric… 102 Binary Tree Level Order Traversal 🟡 Medium 1m 30s The problem asks us to perform a level order traversal on a binary … 103...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 15xx

LeetCode 15xx # Problem Difficulty Time Notes 1500 Design a File Sharing System 🟡 Medium 1m 26s This problem asks us to design a miniature peer-to-peer file sharin… 1501 Countries You Can Safely Invest In 🟡 Medium 1m 2s This is a SQL database problem where we need to identify countries … 1502 Can Make Arithmetic Progression From Sequence 🟢 Easy 52s The problem asks us to determine whether the...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 34xx

LeetCode 34xx # Problem Difficulty Time Notes 3400 Maximum Number of Matching Indices After Right Shifts 🟡 Medium 1m 13s The problem gives us two arrays, nums1 and nums2, both of the same … 3401 Find Circular Gift Exchange Chains 🔴 Hard 35s Here’s a full technical solution guide following your requested for… 3402 Minimum Operations to Make Columns Strictly Increasing 🟢 Easy 46s The problem gives us a matrix...
leetcode algorithms practice
Practice › LeetCode › LeetCode (archived) ›

LeetCode 00xx

LeetCode 00xx # Title Difficulty Description 1 LeetCode 1: Two Sum Easy A clear explanation of the Two Sum problem using brute force first, then an optimized hash map solution. 2 LeetCode 2: Add Two Numbers Medium A detailed explanation of the Add Two Numbers linked list problem, including digit-by-digit addition, carry handling, and linked list construction. 3 LeetCode 3: Longest Substring Without Repeating Characters Medium A clear explanation of...
leetcode algorithms practice
Practice › LeetCode › LeetCode (archived) ›

LeetCode 04xx

LeetCode 04xx # Title Difficulty Description 400 LeetCode 400: Nth Digit Medium A clear explanation of finding the nth digit in the infinite integer sequence using digit groups and arithmetic. 401 LeetCode 401: Binary Watch Easy A clear explanation of the Binary Watch problem using bit counting over all valid times. 402 LeetCode 402: Remove K Digits Medium A clear explanation of the Remove K Digits problem using a greedy...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 21xx

LeetCode 21xx # Problem Difficulty Time Notes 2100 Find Good Days to Rob the Bank 🟡 Medium 52s The problem asks us to find all days that are "good" for robbing a … 2101 Detonate the Maximum Bombs 🟡 Medium 1m 18s In this problem, each bomb is represented by three integers: its x-… 2102 Sequentially Ordinal Rank Tracker 🔴 Hard 1m 27s The problem asks us to design a...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 28xx

LeetCode 28xx # Problem Difficulty Time Notes 2800 Shortest String That Contains Three Strings 🟡 Medium 58s The problem asks us to construct a string that contains three given… 2801 Count Stepping Numbers in Range 🔴 Hard 1m 39s The problem asks us to count how many integers in the inclusive ran… 2802 Find The K-th Lucky Number 🟡 Medium 42s This problem asks us to find the k-th lucky...
leetcode algorithms practice
Practice › LeetCode › LeetCode (archived) ›

LeetCode 05xx

LeetCode 05xx # Title Difficulty Description 500 LeetCode 500: Keyboard Row Easy A clear explanation of filtering words that can be typed using only one row of an American keyboard. 501 LeetCode 501: Find Mode in Binary Search Tree Easy A clear explanation of finding the most frequent value or values in a binary search tree using inorder traversal. 502 LeetCode 502: IPO Hard A clear explanation of maximizing capital...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 20xx

LeetCode 20xx # Problem Difficulty Time Notes 2000 Reverse Prefix of Word 🟢 Easy 58s The problem gives us a string word and a character ch. We must loca… 2001 Number of Pairs of Interchangeable Rectangles 🟡 Medium 2m 30s This problem asks us to count how many pairs of rectangles are inte… 2002 Maximum Product of the Length of Two Palindromic Subsequences 🟡 Medium 6m 9s The problem is...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 11xx

LeetCode 11xx # Problem Difficulty Time Notes 1100 Find K-Length Substrings With No Repeated Characters 🟡 Medium 57s The problem asks us to count how many substrings of length k contai… 1101 The Earliest Moment When Everyone Become Friends 🟡 Medium 5m 31s The problem is asking us to determine the earliest time at which a … 1102 Path With Maximum Minimum Value 🟡 Medium 1m 55s The problem asks...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 13xx

LeetCode 13xx # Problem Difficulty Time Notes 1300 Sum of Mutated Array Closest to Target 🟡 Medium 1m 28s The problem gives us an integer array arr and an integer target. We… 1301 Number of Paths with Max Score 🔴 Hard 1m 43s In this problem, we are given an n x n board where each cell contai… 1302 Deepest Leaves Sum 🟡 Medium 2m 21s That is a long,...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 31xx

LeetCode 31xx # Problem Difficulty Time Notes 3100 Water Bottles II 🟡 Medium 1m 20s This problem models a bottle exchange process where the exchange ra… 3101 Count Alternating Subarrays 🟡 Medium 1m 51s The problem gives us a binary array nums, meaning every element is … 3102 Minimize Manhattan Distances 🔴 Hard 1m 41s The problem asks us to minimize the maximum Manhattan distance betw… 3103 Find Trending Hashtags...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 37xx

LeetCode 37xx # Problem Difficulty Time Notes 3700 Number of ZigZag Arrays II 🔴 Hard 46s The problem asks us to count the number of arrays of length n where… 3702 Longest Subsequence With Non-Zero Bitwise XOR 🟡 Medium 1m 18s We are given an integer array nums, and we must determine the maxim… 3703 Remove K-Balanced Substrings 🟡 Medium 1m 24s We are given a string s consisting only...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 08xx

LeetCode 08xx # Problem Difficulty Time Notes 800 Similar RGB Color 🟢 Easy 39s The problem is asking us to find the shorthand RGB color that is mo… 801 Minimum Swaps To Make Sequences Increasing 🔴 Hard 47s The problem gives us two arrays, nums1 and nums2, both of the same … 802 Find Eventual Safe States 🟡 Medium 1m 10s This problem gives us a directed graph represented as...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 00xx

LeetCode 00xx # Problem Difficulty Time Notes 1 Two Sum 🟢 Easy 4m The problem gives us an integer array called nums and another integ… 2 Add Two Numbers 🟡 Medium 2m 35s The problem gives us two non empty singly linked lists. Each linked… 3 Longest Substring Without Repeating Characters 🟡 Medium 1m 9s The problem gives a string s and asks for the length of the longest… 4...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 12xx

LeetCode 12xx # Problem Difficulty Time Notes 1200 Minimum Absolute Difference 🟢 Easy 51s The problem asks us to find all pairs of numbers in an array that h… 1201 Ugly Number III 🟡 Medium 1m 23s The problem defines an "ugly number" as any positive integer that i… 1202 Smallest String With Swaps 🟡 Medium 1m 27s The problem gives us a string s and a list of index...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 04xx

LeetCode 04xx # Problem Difficulty Time Notes 400 Nth Digit 🟡 Medium 1m 15s The problem asks us to find the digit that appears at position n in… 401 Binary Watch 🟢 Easy 1m 17s The problem describes a binary watch that uses LEDs to represent ti… 402 Remove K Digits 🟡 Medium 1m 26s The problem gives us a numeric string num and an integer k. We must… 403...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 36xx

LeetCode 36xx # Problem Difficulty Time Notes 3600 Maximize Spanning Tree Stability with Upgrades 🔴 Hard 5m 50s This problem asks us to determine the maximum possible stability of… 3601 Find Drivers with Improved Fuel Efficiency 🟡 Medium 3m 7s This problem asks final stage, preserving accuracy during computati… 3602 Hexadecimal and Hexatrigesimal Conversion 🟢 Easy 3m 37s The numbers that still fit in standard integer types; the algorithm… 3604...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 23xx

LeetCode 23xx # Problem Difficulty Time Notes 2300 Successful Pairs of Spells and Potions 🟡 Medium 35s The problem asks us to determine, for each spell, how many potions … 2301 Match Substring After Replacement 🔴 Hard 1m 26s The problem gives us a string s, a target string sub, and a list of… 2302 Count Subarrays With Score Less Than K 🔴 Hard 42s The problem asks us to...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 05xx

LeetCode 05xx # Problem Difficulty Time Notes 500 Keyboard Row 🟢 Easy 1m This problem asks us to determine which words in a given list can b… 501 Find Mode in Binary Search Tree 🟢 Easy 55s This problem asks us to find the mode(s) in a Binary Search Tree (B… 502 IPO 🔴 Hard 1m 16s The problem describes a scenario where we have a limited number of …...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 26xx

LeetCode 26xx # Problem Difficulty Time Notes 2600 K Items With the Maximum Sum 🟢 Easy 48s The problem asks us to determine the maximum possible sum when pick… 2601 Prime Subtraction Operation 🟡 Medium 1m 20s The problem gives us an integer array nums and asks whether it is p… 2602 Minimum Operations to Make All Array Elements Equal 🟡 Medium 1m 20s The problem gives us an integer...
leetcode algorithms practice
Practice › LeetCode › LeetCode (archived) ›

LeetCode 09xx

LeetCode 09xx # Title Difficulty Description 900 LeetCode 900: RLE Iterator Medium A clear explanation of designing an iterator over a run-length encoded sequence without expanding it. 901 LeetCode 901: Online Stock Span Medium A clear explanation of Online Stock Span using a monotonic decreasing stack with accumulated spans. 902 LeetCode 902: Numbers At Most N Given Digit Set Hard A clear explanation of counting numbers less than or equal...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 16xx

LeetCode 16xx # Problem Difficulty Time Notes 1600 Throne Inheritance 🟡 Medium 1m 24s The problem asks us to design a data structure that simulates a roy… 1601 Maximum Number of Achievable Transfer Requests 🔴 Hard 53s The problem asks us to maximize the number of employee transfer req… 1602 Find Nearest Right Node in Binary Tree 🟡 Medium 5m 40s This problem asks us to find the nearest node...
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Practice › LeetCode ›

LeetCode 07xx

LeetCode 07xx # Problem Difficulty Time Notes 700 Search in a Binary Search Tree 🟢 Easy 1m 12s This problem gives us the root node of a Binary Search Tree, common… 701 Insert into a Binary Search Tree 🟡 Medium 1m 18s This problem asks us to insert a new value into an existing Binary … 702 Search in a Sorted Array of Unknown Size 🟡 Medium 1m 21s This...
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Practice › LeetCode ›

LeetCode 22xx

LeetCode 22xx # Problem Difficulty Time Notes 2200 Find All K-Distant Indices in an Array 🟢 Easy 47s The problem requires identifying all indices in an array nums that … 2201 Count Artifacts That Can Be Extracted 🟡 Medium 1m 30s This problem models an excavation process on a square n x n grid. S… 2202 Maximize the Topmost Element After K Moves 🟡 Medium 1m 19s In this problem,...
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Practice › LeetCode ›

LeetCode 24xx

LeetCode 24xx # Problem Difficulty Time Notes 2400 Number of Ways to Reach a Position After Exactly k Steps 🟡 Medium 1m 18s This problem asks us to count the number of distinct ways to move f… 2401 Longest Nice Subarray 🟡 Medium 1m 47s The problem gives an array of positive integers and asks for the le… 2402 Meeting Rooms III 🔴 Hard 51s The problem is about scheduling...
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Practice › LeetCode ›

LeetCode 14xx

LeetCode 14xx # Problem Difficulty Time Notes 1400 Construct K Palindrome Strings 🟡 Medium 1m 12s The problem is asking whether a given string s can be rearranged to… 1401 Circle and Rectangle Overlapping 🟡 Medium 4m 28s The problem gives two geometric shapes: 1. A circle, defined by: - … 1402 Reducing Dishes 🔴 Hard 1m 9s In this problem, we are given an integer array called satisfaction,… 1403...
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Practice › LeetCode ›

LeetCode 17xx

LeetCode 17xx # Problem Difficulty Time Notes 1700 Number of Students Unable to Eat Lunch 🟢 Easy 1m 13s This problem simulates a school cafeteria where students line up to… 1701 Average Waiting Time 🟡 Medium 2m 22s This problem is asking us to simulate the operation of a single-che… 1702 Maximum Binary String After Change 🟡 Medium 2m 21s This problem gives us a binary string consisting only of...
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Practice › LeetCode ›

LeetCode 29xx

LeetCode 29xx # Problem Difficulty Time Notes 2900 Longest Unequal Adjacent Groups Subsequence I 🟢 Easy 1m 21s We are given two arrays of the same length: - words[i] is a string.… 2901 Longest Unequal Adjacent Groups Subsequence II 🟡 Medium 37s The problem asks us to select the longest subsequence of words from… 2902 Count of Sub-Multisets With Bounded Sum 🔴 Hard 48s The problem asks us to count...
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Practice › LeetCode ›

LeetCode 25xx

LeetCode 25xx # Problem Difficulty Time Notes 2500 Delete Greatest Value in Each Row 🟢 Easy 44s The problem presents an m x n matrix grid of positive integers and … 2501 Longest Square Streak in an Array 🟡 Medium 52s The problem asks us to identify the longest square streak in an arr… 2502 Design Memory Allocator 🟡 Medium 46s The problem requires designing a memory allocator that manages...
leetcode algorithms practice
Practice › LeetCode › LeetCode (archived) ›

LeetCode 07xx

LeetCode 07xx # Title Difficulty Description 700 LeetCode 700: Search in a Binary Search Tree Easy Search for a target value in a binary search tree and return the subtree rooted at the matching node. 701 LeetCode 701: Insert into a Binary Search Tree Medium A clear explanation of inserting a value into a binary search tree using recursive and iterative traversal. 702 LeetCode 702: Search in a Sorted Array...
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Practice › LeetCode ›

LeetCode 03xx

LeetCode 03xx # Problem Difficulty Time Notes 300 Longest Increasing Subsequence 🟡 Medium 1m 18s The problem asks us to find the length of the longest strictly incr… 301 Remove Invalid Parentheses 🔴 Hard 2m 59s The problem asks us to remove the minimum number of invalid parenth… 302 Smallest Rectangle Enclosing Black Pixels 🔴 Hard 2m 44s This problem gives us a binary matrix where each cell contains eith…...
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Practice › LeetCode ›

LeetCode 33xx

LeetCode 33xx # Problem Difficulty Time Notes 3300 Minimum Element After Replacement With Digit Sum 🟢 Easy 1m 6s The problem asks us to transform an array of integers nums by repla… 3301 Maximize the Total Height of Unique Towers 🟡 Medium 1m 20s We are given an array maximumHeight where maximumHeight[i] represen… 3302 Find the Lexicographically Smallest Valid Sequence 🟡 Medium 58s The problem asks us to find a...
leetcode algorithms practice
Practice › LeetCode › LeetCode (archived) ›

LeetCode 06xx

LeetCode 06xx # Title Difficulty Description 600 LeetCode 600: Non-negative Integers without Consecutive Ones Hard A clear digit dynamic programming solution for counting numbers whose binary representation does not contain consecutive ones. 601 LeetCode 601: Human Traffic of Stadium Hard A SQL guide for finding stadium records that belong to runs of at least three consecutive ids where each row has at least 100 people. 602 LeetCode 602: Friend Requests...
leetcode algorithms practice
Practice › LeetCode › LeetCode (archived) ›

LeetCode 10xx

LeetCode 10xx # Title Difficulty Description 1000 LeetCode 1000: Minimum Cost to Merge Stones Hard A clear explanation of merging consecutive stone piles with minimum cost using interval dynamic programming. 1001 LeetCode 1001: Grid Illumination Hard A clear explanation of simulating lamp illumination on a grid using hash maps for rows, columns, and diagonals. 1002 LeetCode 1002: Find Common Characters Easy A clear explanation of finding characters that appear in...
leetcode algorithms practice
Practice › LeetCode › LeetCode (archived) ›

LeetCode 03xx

LeetCode 03xx # Title Difficulty Description 300 LeetCode 300: Longest Increasing Subsequence Medium A dynamic programming and patience sorting solution for finding the longest strictly increasing subsequence in an array. 301 LeetCode 301: Remove Invalid Parentheses Hard A clear explanation of Remove Invalid Parentheses using BFS to guarantee the minimum number of removals. 302 LeetCode 302: Smallest Rectangle Enclosing Black Pixels Hard A clear explanation of Smallest Rectangle Enclosing Black...
leetcode algorithms practice
Practice › LeetCode ›

LeetCode 38xx

LeetCode 38xx # Problem Difficulty Time Notes 3801 Minimum Cost to Merge Sorted Lists 🔴 Hard 1m 34s We are given between 2 and 12 sorted lists. At any moment we may ch… 3802 Number of Ways to Paint Sheets 🔴 Hard 43s The problem asks us to compute the number of ways to paint n sheets… 3803 Count Residue Prefixes 🟢 Easy 19m 49s The problem asks us to...
leetcode algorithms practice
Practice › LeetCode › LeetCode (archived) ›

LeetCode 01xx

LeetCode 01xx # Title Difficulty Description 100 LeetCode 100: Same Tree Easy A detailed guide to solving Same Tree with recursive DFS and structural comparison. 101 LeetCode 101: Symmetric Tree Easy A clear explanation of checking whether a binary tree is symmetric using mirror recursion. 102 LeetCode 102: Binary Tree Level Order Traversal Medium A clear explanation of binary tree level order traversal using breadth-first search and a queue. 103...
leetcode algorithms practice