LeetCode 35xx
LeetCode problems 3500–3599
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, and we are allowed to choose: 1.… |
| 3504 | Longest Palindrome After Substring Concatenation II | 🔴 Hard | 36s | We are given two strings, s and t. We may choose any substring from… |
| 3505 | Minimum Operations to Make Elements Within K Subarrays Equal | 🔴 Hard | 1m 24s | You are given an integer array nums, and you want to create at leas… |
| 3506 | Find Time Required to Eliminate Bacterial Strains | 🔴 Hard | 39s | This problem asks us to find the minimum time required to eliminate… |
| 3507 | Minimum Pair Removal to Sort Array I | 🟢 Easy | 1m 16s | We are given an array nums. At any step, we are not free to choose … |
| 3508 | Implement Router | 🟡 Medium | 45s | The problem is asking us to design a Router data structure to manag… |
| 3509 | Maximum Product of Subsequences With an Alternating Sum Equal to K | 🔴 Hard | 48s | The problem asks us to find a subsequence of a given integer array … |
| 3510 | Minimum Pair Removal to Sort Array II | 🔴 Hard | 1m 9s | We are given an array nums. The operation is highly constrained: 1.… |
| 3511 | Make a Positive Array | 🟡 Medium | 35s | Before diving into the detailed solution guide, I want to clarify o… |
| 3512 | Minimum Operations to Make Array Sum Divisible by K | 🟢 Easy | 1m 10s | The problem gives us an integer array nums and an integer k. We are… |
| 3513 | Number of Unique XOR Triplets I | 🟡 Medium | 53s | The problem asks us to determine the number of unique values that c… |
| 3514 | Number of Unique XOR Triplets II | 🟡 Medium | 1m 14s | We are given an integer array nums, and we must consider every trip… |
| 3515 | Shortest Path in a Weighted Tree | 🔴 Hard | 1m 22s | We are given a weighted tree with n nodes, rooted at node 1. A tree… |
| 3516 | Find Closest Person | 🟢 Easy | 1m 8s | This problem gives us three integers, x, y, and z, representing the… |
| 3517 | Smallest Palindromic Rearrangement I | 🟡 Medium | 40s | The problem asks us to take a palindromic string s and return its l… |
| 3518 | Smallest Palindromic Rearrangement II | 🔴 Hard | 1m 42s | We are given a string s that is guaranteed to already be a palindro… |
| 3519 | Count Numbers with Non-Decreasing Digits | 🔴 Hard | 1m 45s | We are given two very large integers l and r as decimal strings and… |
| 3521 | Find Product Recommendation Pairs | 🟡 Medium | 1m 16s | This problem asks us to identify product pairs that are frequently … |
| 3523 | Make Array Non-decreasing | 🟡 Medium | 49s | The problem asks us to transform an integer array nums into a non-d… |
| 3524 | Find X Value of Array I | 🟡 Medium | 1m 45s | The operation described in the problem may initially look unusual, … |
| 3525 | Find X Value of Array II | 🔴 Hard | 1m 25s | For each query, two things happen in order. First, we permanently u… |
| 3527 | Find the Most Common Response | 🟡 Medium | 1m 33s | This problem gives us a two dimensional array of strings called res… |
| 3528 | Unit Conversion I | 🟡 Medium | 42s | The problem is asking us to compute, for each unit type from 0 to n… |
| 3529 | Count Cells in Overlapping Horizontal and Vertical Substrings | 🟡 Medium | 1m 22s | We are given a character matrix and a pattern string. The key obser… |
| 3530 | Maximum Profit from Valid Topological Order in DAG | 🔴 Hard | 47s | The problem requires computing the maximum possible profit achievab… |
| 3532 | Path Existence Queries in a Graph I | 🟡 Medium | 1m 23s | This problem defines an undirected graph implicitly through a sorte… |
| 3533 | Concatenated Divisibility | 🔴 Hard | 1m 40s | We are given an array nums containing up to 13 positive integers an… |
| 3534 | Path Existence Queries in a Graph II | 🔴 Hard | 47s | This problem asks us to compute the shortest path between nodes in … |
| 3535 | Unit Conversion II | 🟡 Medium | 1m 8s | The input describes a collection of unit conversion relationships. … |
| 3536 | Maximum Product of Two Digits | 🟢 Easy | 1m 5s | The problem gives us a positive integer n and asks us to find the m… |
| 3538 | Merge Operations for Minimum Travel Time | 🔴 Hard | 46s | This problem presents a road of length l kilometers, segmented by n… |
| 3540 | Minimum Time to Visit All Houses | 🟡 Medium | 1m 19s | This problem describes a set of n houses arranged in a circle. Betw… |
| 3541 | Find Most Frequent Vowel and Consonant | 🟢 Easy | 53s | The problem requires analyzing a string s composed of lowercase Eng… |
| 3542 | Minimum Operations to Convert All Elements to Zero | 🟡 Medium | 57s | The problem requires us to reduce all elements of a given non-negat… |
| 3543 | Maximum Weighted K-Edge Path | 🟡 Medium | 1m 21s | We are given a directed acyclic graph (DAG) with n nodes and weight… |
| 3544 | Subtree Inversion Sum | 🔴 Hard | 48s | This problem asks us to select a subset of nodes in a rooted tree s… |
| 3545 | Minimum Deletions for At Most K Distinct Characters | 🟢 Easy | 1m 19s | The problem gives us a string s containing lowercase English letter… |
| 3546 | Equal Sum Grid Partition I | 🟡 Medium | 1m 6s | This problem asks us to determine whether a rectangular grid of pos… |
| 3547 | Maximum Sum of Edge Values in a Graph | 🔴 Hard | 2m 30s | The graph is undirected, connected, and every node has degree at mo… |
| 3549 | Multiply Two Polynomials | 🔴 Hard | 1m 9s | The input arrays represent polynomials in coefficient form. If: the… |
| 3552 | Grid Teleportation Traversal | 🟡 Medium | 1m 4s | This problem presents a 2D grid traversal scenario with obstacles a… |
| 3553 | Minimum Weighted Subgraph With the Required Paths II | 🔴 Hard | 1m 37s | We are given a weighted, undirected tree with n nodes. Because the … |
| 3554 | Find Category Recommendation Pairs | 🔴 Hard | 1m 5s | This is a SQL database problem involving customer purchasing behavi… |
| 3556 | Sum of Largest Prime Substrings | 🟡 Medium | 52s | The problem requires identifying prime numbers from all possible su… |
| 3557 | Find Maximum Number of Non Intersecting Substrings | 🟡 Medium | 37s | This problem asks us to identify the maximum number of non-intersec… |
| 3558 | Number of Ways to Assign Edge Weights I | 🟡 Medium | 1m 26s | We are given an undirected tree rooted at node 1. Every edge initia… |
| 3559 | Number of Ways to Assign Edge Weights II | 🔴 Hard | 1m 15s | We are given an undirected tree with n nodes, rooted at node 1. Eve… |
| 3560 | Find Minimum Log Transportation Cost | 🟢 Easy | 32s | The problem asks us to transport two logs of lengths n and m using … |
| 3561 | Resulting String After Adjacent Removals | 🟡 Medium | 50s | The problem asks us to repeatedly remove pairs of adjacent characte… |
| 3563 | Lexicographically Smallest String After Adjacent Removals | 🔴 Hard | 40s | The problem asks us to find the lexicographically smallest string t… |
| 3565 | Sequential Grid Path Cover | 🟡 Medium | 54s | The problem asks us to find a path that visits every cell of a give… |
| 3566 | Partition Array into Two Equal Product Subsets | 🟡 Medium | 48s | Here’s a detailed technical solution guide for LeetCode 3566 follow… |
| 3567 | Minimum Absolute Difference in Sliding Submatrix | 🟡 Medium | 32s | The problem requires computing a specific statistic for every conti… |
| 3570 | Find Books with No Available Copies | 🟢 Easy | 46s | This problem asks us to identify books in a library system that are… |
| 3571 | Find the Shortest Superstring II | 🟢 Easy | 46s | This problem asks us to construct the shortest string that contains… |
| 3572 | Maximize Y\u2011Sum by Picking a Triplet of Distinct X\u2011Values | 🟡 Medium | 1m 23s | The problem gives us two arrays, x and y, both of length n. Each po… |
| 3573 | Best Time to Buy and Sell Stock V | 🟡 Medium | 1m 44s | This problem extends the classic stock trading dynamic programming … |
| 3574 | Maximize Subarray GCD Score | 🔴 Hard | 44s | The problem asks us to choose a contiguous subarray from an array o… |
| 3577 | Count the Number of Computer Unlocking Permutations | 🟡 Medium | 1m 10s | The problem presents a set of n computers, each with a unique passw… |
| 3578 | Count Partitions With Max-Min Difference at Most K | 🟡 Medium | 1m 34s | We are given an array nums and an integer k. We want to split the a… |
| 3579 | Minimum Steps to Convert String with Operations | 🔴 Hard | 50s | The problem asks us to transform one string, word1, into another st… |
| 3580 | Find Consistently Improving Employees | 🟡 Medium | 32s | The task asks us to identify employees whose performance has consis… |
| 3582 | Generate Tag for Video Caption | 🟢 Easy | 1m 20s | The problem asks us to transform a given caption string into a vali… |
| 3585 | Find Weighted Median Node in Tree | 🔴 Hard | 1m 37s | We are given a weighted tree with n nodes. A tree is an undirected … |
| 3586 | Find COVID Recovery Patients | 🟡 Medium | 54s | The task is to identify patients who have recovered from COVID base… |
| 3588 | Find Maximum Area of a Triangle | 🟡 Medium | 1m 41s | We are given n distinct points on a 2D Cartesian plane. Each point … |
| 3589 | Count Prime-Gap Balanced Subarrays | 🟡 Medium | 1m 56s | We are given an integer array nums and an integer k. We must count … |
| 3590 | Kth Smallest Path XOR Sum | 🔴 Hard | 47s | The problem asks us to work with an undirected tree rooted at node … |
| 3591 | Check if Any Element Has Prime Frequency | 🟢 Easy | 49s | This problem asks us to determine whether any number in an array ap… |
| 3592 | Inverse Coin Change | 🟡 Medium | 2m 45s | The problem gives us a 1-indexed array numWays, where numWays[i] in… |
| 3593 | Minimum Increments to Equalize Leaf Paths | 🟡 Medium | 1m 32s | We are given a rooted tree with root node 0. Every node has a cost,… |
| 3594 | Minimum Time to Transport All Individuals | 🔴 Hard | 1m 40s | This problem is a shortest-path optimization over a highly constrai… |
| 3595 | Once Twice | 🟡 Medium | 43s | The problem provides an integer array nums where every element appe… |
| 3596 | Minimum Cost Path with Alternating Directions I | 🟡 Medium | 52s | This problem requires computing the minimum total cost to traverse … |
| 3597 | Partition String | 🟡 Medium | 1m 21s | We are given a string s and must partition it into segments accordi… |
| 3599 | Partition Array to Minimize XOR | 🟡 Medium | 1m 56s | This problem asks us to partition an array of integers, nums, into … |
| 3500 | Minimum Cost to Divide Array Into Subarrays | 🔴 Hard | 1m 17s | The problem requires partitioning an array nums into contiguous sub… |
| 3501 | Maximize Active Section with Trade II | 🔴 Hard | 4m 1s | For a query [l, r], we do not work directly on the whole string s. … |
| 3502 | Minimum Cost to Reach Every Position | 🟢 Easy | 1m 22s | We are given an array cost of length n. There are n + 1 positions i… |
| 3503 | Longest Palindrome After Substring Concatenation I | 🟡 Medium | 1m 54s | The problem gives us two strings, s and t. We are allowed to choose… |
| 3504 | Longest Palindrome After Substring Concatenation II | 🔴 Hard | 2m 23s | We are given two stringsating substrings. |
| 3505 | Minimum Operations to Make Elements Within K Subarrays Equal | 🔴 Hard | 2m 55s | The previous the official accepted solution, please provide the pro… |
| 3506 | Find Time Required to Eliminate Bacterial Strains | 🔴 Hard | 1m 20s | We are given an array timeReq where each element represents the pro… |
| 3507 | Minimum Pair Removal to Sort Array I | 🟢 Easy | 1m 20s | Before I begin, I want to clarify one subtle point about the proble… |
| 3508 | Implement Router | 🟡 Medium | 1m 29s | We are asked to design a data structure, Router, that simulates pac… |
| 3509 | Maximum Product of Subsequences With an Alternating Sum Equal to K | 🔴 Hard | 1m 21s | The problem asks us to find a non-empty subsequence of a given inte… |
| 3510 | Minimum Pair Removal to Sort Array II | 🔴 Hard | 1m 33s | Before I begin, I want to clarify one subtlety in the problem state… |
| 3511 | Make a Positive Array | 🟡 Medium | 1m 39s | The problem defines a “positive array” using a somewhat global cond… |
| 3512 | Minimum Operations to Make Array Sum Divisible by K | 🟢 Easy | 1m 31s | The problem defines a single global quantity, the sum of the array … |
| 3513 | Number of Unique XOR Triplets I | 🟡 Medium | 1m 26s | This problem asks for the number of distinct XOR results that can b… |
| 3514 | Number of Unique XOR Triplets II | 🟡 Medium | 1m 23s | The problem asks us to compute the number of unique XOR triplet val… |
| 3515 | Shortest Path in a Weighted Tree | 🔴 Hard | 1m 50s | This problem asks us to maintain and query shortest path distances … |
| 3516 | Find Closest Person | 🟢 Easy | 1m 19s | The problem asks us to determine which of two people, Person 1 or P… |
| 3517 | Smallest Palindromic Rearrangement I | 🟡 Medium | 1m 23s | The problem gives a string s that is already guaranteed to be a pal… |
| 3518 | Smallest Palindromic Rearrangement II | 🔴 Hard | 1m 38s | The problem asks us to find the k-th lexicographically smallest pal… |
| 3519 | Count Numbers with Non-Decreasing Digits | 🔴 Hard | 2m 3s | This problem asks us to count the numbers within a given inclusive … |
| 3520 | Minimum Threshold for Inversion Pairs Count | 🟡 Medium | 2m 12s | The problem asks us to find the minimum threshold x such that there… |
| 3521 | Find Product Recommendation Pairs | 🟡 Medium | 2m | This problem asks us to identify product pairs that are frequently … |
| 3522 | Calculate Score After Performing Instructions | 🟡 Medium | 1m 36s | The problem presents a simulated execution environment defined by t… |
| 3523 | Make Array Non-decreasing | 🟡 Medium | 1m 46s | The problem asks us to determine the maximum possible size of a non… |
| 3524 | Find X Value of Array I | 🟡 Medium | 2m 19s | The problem asks us to count how many ways we can perform a single … |
| 3525 | Find X Value of Array II | 🔴 Hard | 2m 17s | We are given an array nums of positive integers and a modulus k ≤ 5… |
| 3526 | Range XOR Queries with Subarray Reversals | 🔴 Hard | 2m 9s | The problem asks us to maintain a dynamic array of integers under t… |
| 3527 | Find the Most Common Response | 🟡 Medium | 1m 54s | We are given a two-dimensional array responses, where each response… |
| 3528 | Unit Conversion I | 🟡 Medium | 5m 5s | The problem asks us to compute the conversion of every unit type in… |
| 3529 | Count Cells in Overlapping Horizontal and Vertical Substrings | 🟡 Medium | 1m 34s | The problem requires counting cells in a 2D m x n character grid th… |
| 3530 | Maximum Profit from Valid Topological Order in DAG | 🔴 Hard | 1m 21s | This problem asks us to construct a valid topological ordering of a… |
| 3531 | Count Covered Buildings | 🟡 Medium | 1m 18s | The task asks us to count how many buildings in a given set are cov… |
| 3532 | Path Existence Queries in a Graph I | 🟡 Medium | 1m 36s | This problem gives a graph defined implicitly rather than explicitl… |
| 3533 | Concatenated Divisibility | 🔴 Hard | 1m 39s | We are given an array nums of length at most 13 and a positive inte… |
| 3534 | Path Existence Queries in a Graph II | 🔴 Hard | 1m 38s | This problem defines an undirected graph implicitly from an array o… |
| 3535 | Unit Conversion II | 🟡 Medium | 1m 54s | This problem defines a system of unit conversions forming a connect… |
| 3536 | Maximum Product of Two Digits | 🟢 Easy | 1m 46s | This problem asks us to compute the maximum product obtainable by m… |
| 3537 | Fill a Special Grid | 🟡 Medium | 1m 40s | The problem asks us to construct a structured matrix filled with al… |
| 3538 | Merge Operations for Minimum Travel Time | 🔴 Hard | 1m 41s | This problem is asking us to minimize the total travel time along a… |
| 3539 | Find Sum of Array Product of Magical Sequences | 🔴 Hard | 1m 49s | This problem asks us to compute the sum of array products for all m… |
| 3540 | Minimum Time to Visit All Houses | 🟡 Medium | 2m 12s | We are given a directed circular graph on vertices labeled . Betwee… |
| 3541 | Find Most Frequent Vowel and Consonant | 🟢 Easy | 1m 29s | This problem asks us to analyze a string s composed entirely of low… |
| 3542 | Minimum Operations to Convert All Elements to Zero | 🟡 Medium | 2m 5s | We are given an array nums of length n, where each element is a non… |
| 3543 | Maximum Weighted K-Edge Path | 🟡 Medium | 1m 35s | The problem asks us to find a path in a directed acyclic graph (DAG… |
| 3544 | Subtree Inversion Sum | 🔴 Hard | 2m 9s | We are given an undirected tree rooted at node 0, where each node i… |
| 3545 | Minimum Deletions for At Most K Distinct Characters | 🟢 Easy | 1m 20s | The problem asks us to modify a given string s by deleting characte… |
| 3546 | Equal Sum Grid Partition I | 🟡 Medium | 1m 28s | The problem asks us to determine whether a given m x n matrix of po… |
| 3547 | Maximum Sum of Edge Values in a Graph | 🔴 Hard | 1m 56s | We are asked to assign unique values from 1 to n to the nodes of an… |
| 3548 | Equal Sum Grid Partition II | 🔴 Hard | 1m 36s | The problem asks us to determine if we can partition a given m x n … |
| 3549 | Multiply Two Polynomials | 🔴 Hard | 1m 40s | The problem requires multiplying two polynomials represented as int… |
| 3550 | Smallest Index With Digit Sum Equal to Index | 🟢 Easy | 1m 30s | The problem requires us to find the smallest index in an integer ar… |
| 3551 | Minimum Swaps to Sort by Digit Sum | 🟡 Medium | 1m 50s | We are given an array nums consisting of distinct positive integers… |
| 3552 | Grid Teleportation Traversal | 🟡 Medium | 1m 58s | The problem asks us to find the minimum number of moves required to… |
| 3553 | Minimum Weighted Subgraph With the Required Paths II | 🔴 Hard | 1m 40s | The problem presents an undirected weighted tree with n nodes label… |
| 3554 | Find Category Recommendation Pairs | 🔴 Hard | 2m 24s | The problem asks us to analyze purchasing patterns across product c… |
| 3555 | Smallest Subarray to Sort in Every Sliding Window | 🟡 Medium | 1m 53s | The problem asks us to examine every contiguous subarray (window) o… |
| 3556 | Sum of Largest Prime Substrings | 🟡 Medium | 6m 48s | Something went wrong. If this issue persists please contact us thro… |
| 3557 | Find Maximum Number of Non Intersecting Substrings | 🟡 Medium | 1m 23s | We are given a string word of length , where . The task is to selec… |
| 3558 | Number of Ways to Assign Edge Weights I | 🟡 Medium | 1m 28s | We are given an undirected tree rooted at node 1, with n nodes and … |
| 3559 | Number of Ways to Assign Edge Weights II | 🔴 Hard | 1m 37s | Let's carefully work through this LeetCode problem and provide a co… |
| 3560 | Find Minimum Log Transportation Cost | 🟢 Easy | 1m 44s | We are given two log lengths and , and three trucks. Each truck can… |
| 3561 | Resulting String After Adjacent Removals | 🟡 Medium | 1m 24s | The problem requires us to process a string s consisting of lowerca… |
| 3562 | Maximum Profit from Trading Stocks with Discounts | 🔴 Hard | 2m 13s | We are given a rooted tree of employees, where employee 1 is the CE… |
| 3563 | Lexicographically Smallest String After Adjacent Removals | 🔴 Hard | 1m 21s | Sure. Let's go step by step and produce a fully detailed technical … |
| 3564 | Seasonal Sales Analysis | 🟡 Medium | 1m 29s | The task asks us to determine the most popular product category for… |
| 3565 | Sequential Grid Path Cover | 🟡 Medium | 3m 4s | The problem gives, in which case the algorithm correctly returns an… |
| 3566 | Partition Array into Two Equal Product Subsets | 🟡 Medium | 2m 17s | This problem asks whether an array of distinct positive integers ca… |
| 3567 | Minimum Absolute Difference in Sliding Submatrix | 🟡 Medium | 2m 29s | The problem asks us to analyze every possible contiguous k x k subm… |
| 3568 | Minimum Moves to Clean the Classroom | 🟡 Medium | 1m 57s | The problem asks us to compute the minimum number of moves a studen… |
| 3569 | Maximize Count of Distinct Primes After Split | 🔴 Hard | 2m 32s | The task asks us to maintain an integer array that is repeatedly up… |
| 3570 | Find Books with No Available Copies | 🟢 Easy | 2m 10s | This problem asks us to determine which books in a library are comp… |
| 3571 | Find the Shortest Superstring II | 🟢 Easy | 3m 26s | The problem asks us to construct the shortest possible string that … |
| 3572 | Maximize Y\u2011Sum by Picking a Triplet of Distinct X\u2011Values | 🟡 Medium | 3m 51s | Here is a detailed technical solution guide for LeetCode 3572 follo… |
| 3576 | Transform Array to All Equal Elements | 🟡 Medium | 2m 12s | The problem is asking whether it is possible to transform an array … |
| 3577 | Count the Number of Computer Unlocking Permutations | 🟡 Medium | 2m 19s | We are given an array complex factorial computation, making it effi… |
| 3580 | Find Consistently Improving Employees | 🟡 Medium | 1m 28s | The problem asks us to identify employees whose performance has con… |
| 3582 | Generate Tag for Video Caption | 🟢 Easy | 3m 41s | The is longer. This guarantees correct behavior at the boundary. |
| 3583 | Count Special Triplets | 🟡 Medium | 1m 25s | We are given an integer array nums of length n. We must count the n… |
| 3584 | Maximum Product of First and Last Elements of a Subsequence | 🟡 Medium | 1m 38s | The problem asks for the maximum possible product of the first and … |
| 3585 | Find Weighted Median Node in Tree | 🔴 Hard | 1m 11s | The problem asks us to find a weighted median node along paths in a… |
| 3586 | Find COVID Recovery Patients | 🟡 Medium | 1m 13s | The problem asks us to identify patients who have recovered from CO… |
| 3587 | Minimum Adjacent Swaps to Alternate Parity | 🟡 Medium | 1m 23s | The problem asks for the minimum number of adjacent swaps needed to… |
| 3588 | Find Maximum Area of a Triangle | 🟡 Medium | 1m 44s | We are given a finite set of points in the integer lattice of the C… |
| 3590 | Kth Smallest Path XOR Sum | 🔴 Hard | 2m | The problem presents an undirected tree rooted at node 0 with n nod… |
| 3591 | Check if Any Element Has Prime Frequency | 🟢 Easy | 2m 9s | We are given an integer array nums and must determine whether there… |
| 3592 | Inverse Coin Change | 🟡 Medium | 1m 46s | The problem presents a 1-indexed array numWays of length , where ea… |
| 3593 | Minimum Increments to Equalize Leaf Paths | 🟡 Medium | 3m 19s | We are given a rooted smaller child values trigger an update. |
| 3596 | Minimum Cost Path with Alternating Directions I | 🟡 Medium | 1m 59s | The problem requires finding the minimum cost to traverse a two-dim… |
| 3597 | Partition String | 🟡 Medium | 1m 19s | The problem asks us to partition a string s into segments such that… |