LeetCode 20xx
LeetCode problems 2000–2099
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 asking us to find two disjoint palindromic subsequen… |
| 2003 | Smallest Missing Genetic Value in Each Subtree | 🔴 Hard | 6m 10s | This problem asks us to compute, for every node in a rooted tree, t… |
| 2004 | The Number of Seniors and Juniors to Join the Company | 🔴 Hard | 1m 20s | This problem requires determining how many candidates a company can… |
| 2005 | Subtree Removal Game with Fibonacci Tree | 🔴 Hard | 1m 12s | The problem defines a special kind of binary tree called a Fibonacc… |
| 2006 | Count Number of Pairs With Absolute Difference K | 🟢 Easy | 1m 20s | The problem gives us an integer array nums and an integer k. We nee… |
| 2007 | Find Original Array From Doubled Array | 🟡 Medium | 1m 27s | The problem gives us an array called changed, which was supposedly … |
| 2008 | Maximum Earnings From Taxi | 🟡 Medium | 1m 24s | The problem describes a taxi traveling along a one directional road… |
| 2009 | Minimum Number of Operations to Make Array Continuous | 🔴 Hard | 1m 1s | The problem asks us to transform a given integer array nums into a … |
| 2010 | The Number of Seniors and Juniors to Join the Company II | 🔴 Hard | 1m 25s | The problem asks us to simulate a hiring process with a fixed salar… |
| 2011 | Final Value of Variable After Performing Operations | 🟢 Easy | 57s | This problem asks us to simulate a simple programming language with… |
| 2012 | Sum of Beauty in the Array | 🟡 Medium | 1m | The problem asks us to compute a "beauty" score for each element in… |
| 2013 | Detect Squares | 🟡 Medium | 1m 41s | The problem presents a stream of points in a 2D plane and asks us t… |
| 2014 | Longest Subsequence Repeated k Times | 🔴 Hard | 59s | The problem asks us to find the longest subsequence of a string s t… |
| 2015 | Average Height of Buildings in Each Segment | 🟡 Medium | 1m 57s | The problem describes a street as a number line, and each building … |
| 2016 | Maximum Difference Between Increasing Elements | 🟢 Easy | 55s | The problem is asking us to find the maximum difference between two… |
| 2017 | Grid Game | 🟡 Medium | 1m 21s | The problem gives us a 2 x n grid where each cell contains some num… |
| 2018 | Check if Word Can Be Placed In Crossword | 🟡 Medium | 1m 8s | This problem asks us to determine whether a given word can be legal… |
| 2019 | The Score of Students Solving Math Expression | 🔴 Hard | 1m 38s | The problem gives us a mathematical expression string s containing … |
| 2020 | Number of Accounts That Did Not Stream | 🟡 Medium | 1m 17s | This problem asks us to analyze two database tables, Subscriptions … |
| 2021 | Brightest Position on Street | 🟡 Medium | 1m 2s | The problem asks us to find the position on a straight street that … |
| 2022 | Convert 1D Array Into 2D Array | 🟢 Easy | 47s | The problem asks us to transform a one-dimensional array, original,… |
| 2023 | Number of Pairs of Strings With Concatenation Equal to Target | 🟡 Medium | 1m 2s | The problem asks us to find the number of ordered pairs of indices … |
| 2024 | Maximize the Confusion of an Exam | 🟡 Medium | 1m 26s | This problem asks us to maximize the length of a contiguous block o… |
| 2025 | Maximum Number of Ways to Partition an Array | 🔴 Hard | 1m 39s | The problem asks us to count how many valid partition points exist … |
| 2026 | Low-Quality Problems | 🟢 Easy | 1m 26s | The problem gives us a database table named Problems. Each row repr… |
| 2027 | Minimum Moves to Convert String | 🟢 Easy | 1m 1s | The problem asks us to transform a string s containing only charact… |
| 2028 | Find Missing Observations | 🟡 Medium | 1m 33s | The problem gives us the results of some dice rolls and asks us to … |
| 2029 | Stone Game IX | 🟡 Medium | 58s | The problem describes a turn-based game between Alice and Bob with … |
| 2030 | Smallest K-Length Subsequence With Occurrences of a Letter | 🔴 Hard | 1m 45s | The problem asks us to construct the lexicographically smallest sub… |
| 2031 | Count Subarrays With More Ones Than Zeros | 🟡 Medium | 1m 53s | This problem asks us to count all subarrays of a binary array nums … |
| 2032 | Two Out of Three | 🟢 Easy | 1m 4s | The problem asks us to identify all distinct integers that appear i… |
| 2033 | Minimum Operations to Make a Uni-Value Grid | 🟡 Medium | 1m 28s | The problem gives us a 2D integer matrix called grid and an integer… |
| 2034 | Stock Price Fluctuation | 🟡 Medium | 1m 13s | Here’s a complete, detailed technical solution guide for LeetCode 2… |
| 2035 | Partition Array Into Two Arrays to Minimize Sum Difference | 🔴 Hard | 1m 37s | The problem gives an array nums containing exactly 2 n integers. We… |
| 2036 | Maximum Alternating Subarray Sum | 🟡 Medium | 56s | The problem asks us to compute the maximum alternating subarray sum… |
| 2037 | Minimum Number of Moves to Seat Everyone | 🟢 Easy | 1m 10s | This problem asks us to assign students to seats such that every st… |
| 2038 | Remove Colored Pieces if Both Neighbors are the Same Color | 🟡 Medium | 1m 1s | This problem describes a two-player game played on a line of colore… |
| 2039 | The Time When the Network Becomes Idle | 🟡 Medium | 1m 2s | This problem involves a network of servers where server 0 is the ma… |
| 2040 | Kth Smallest Product of Two Sorted Arrays | 🔴 Hard | 1m | The problem asks for the k-th smallest product that can be formed b… |
| 2041 | Accepted Candidates From the Interviews | 🟡 Medium | 1m 24s | The problem gives us two database tables, Candidates and Rounds, th… |
| 2042 | Check if Numbers Are Ascending in a Sentence | 🟢 Easy | 59s | The problem asks us to analyze a sentence represented as a string s… |
| 2043 | Simple Bank System | 🟡 Medium | 1m 20s | This problem asks us to design a very simple banking system that su… |
| 2044 | Count Number of Maximum Bitwise-OR Subsets | 🟡 Medium | 1m 14s | The problem asks us to examine every possible non-empty subset of t… |
| 2045 | Second Minimum Time to Reach Destination | 🔴 Hard | 51s | Here is a comprehensive technical solution guide for LeetCode 2045 … |
| 2046 | Sort Linked List Already Sorted Using Absolute Values | 🟡 Medium | 51s | The problem provides a singly linked list where the nodes are sorte… |
| 2047 | Number of Valid Words in a Sentence | 🟢 Easy | 1m 5s | This problem asks us to count the number of valid words in a senten… |
| 2048 | Next Greater Numerically Balanced Number | 🟡 Medium | 1m 17s | The problem asks us to find the smallest integer strictly greater t… |
| 2049 | Count Nodes With the Highest Score | 🟡 Medium | 1m 31s | The input describes a rooted binary tree using a parent array. Ever… |
| 2050 | Parallel Courses III | 🔴 Hard | 53s | The problem asks us to determine the minimum number of months requi… |
| 2051 | The Category of Each Member in the Store | 🟡 Medium | 1m 30s | This problem asks us to classify every store member into a category… |
| 2052 | Minimum Cost to Separate Sentence Into Rows | 🟡 Medium | 1m 26s | This problem asks us to format a sentence into multiple rows such t… |
| 2053 | Kth Distinct String in an Array | 🟢 Easy | 1m 23s | The problem asks us to find the kth distinct string in an array of … |
| 2054 | Two Best Non-Overlapping Events | 🟡 Medium | 1m 27s | The problem gives us a list of events, where each event is represen… |
| 2055 | Plates Between Candles | 🟡 Medium | 1m 28s | The problem gives us a string s made of two characters: - '' repres… |
| 2056 | Number of Valid Move Combinations On Chessboard | 🔴 Hard | 53s | The problem asks us to calculate the total number of valid move com… |
| 2057 | Smallest Index With Equal Value | 🟢 Easy | 1m 12s | The problem gives us a 0-indexed integer array nums. We must find t… |
| 2058 | Find the Minimum and Maximum Number of Nodes Between Critical Points | 🟡 Medium | 1m 23s | The problem gives us a singly linked list and asks us to identify a… |
| 2059 | Minimum Operations to Convert Number | 🟡 Medium | 1m 25s | This problem asks us to transform a starting integer into a target … |
| 2060 | Check if an Original String Exists Given Two Encoded Strings | 🔴 Hard | 56s | The problem is asking us to determine whether there exists a single… |
| 2061 | Number of Spaces Cleaning Robot Cleaned | 🟡 Medium | 1m 22s | In this problem, we are given a 2D binary matrix called room. Each … |
| 2062 | Count Vowel Substrings of a String | 🟢 Easy | 52s | The problem requires counting the number of vowel substrings in a g… |
| 2063 | Vowels of All Substrings | 🟡 Medium | 1m 17s | The problem asks us to compute the total number of vowels that appe… |
| 2064 | Minimized Maximum of Products Distributed to Any Store | 🟡 Medium | 1m 15s | The problem gives us n retail stores and an array quantities, where… |
| 2065 | Maximum Path Quality of a Graph | 🔴 Hard | 1m 20s | We are given an undirected weighted graph where each node has an as… |
| 2066 | Account Balance | 🟡 Medium | 1m 16s | This problem asks us to compute the running balance for every bank … |
| 2067 | Number of Equal Count Substrings | 🟡 Medium | 52s | The problem asks us to count the number of substrings in a string s… |
| 2068 | Check Whether Two Strings are Almost Equivalent | 🟢 Easy | 1m 13s | The problem asks us to determine whether two strings are "almost eq… |
| 2069 | Walking Robot Simulation II | 🟡 Medium | 53s | The problem describes a simulation of a robot moving on a rectangul… |
| 2070 | Most Beautiful Item for Each Query | 🟡 Medium | 1m 22s | The problem gives us a list of items, where each item has two prope… |
| 2071 | Maximum Number of Tasks You Can Assign | 🔴 Hard | 1m 23s | This problem asks us to maximize the number of tasks that can be co… |
| 2072 | The Winner University | 🟢 Easy | 1m 26s | The problem gives us two database tables, NewYork and California. E… |
| 2073 | Time Needed to Buy Tickets | 🟢 Easy | 53s | This problem describes a queue of n people, each wanting to buy a c… |
| 2074 | Reverse Nodes in Even Length Groups | 🟡 Medium | 1m 25s | This problem gives us a singly linked list and asks us to process t… |
| 2075 | Decode the Slanted Ciphertext | 🟡 Medium | 46s | The problem requires decoding a string that was encoded using a sla… |
| 2076 | Process Restricted Friend Requests | 🔴 Hard | 1m 33s | This problem models a social network with friendship restrictions. … |
| 2077 | Paths in Maze That Lead to Same Room | 🟡 Medium | 48s | The problem asks us to analyze a maze represented as an undirected … |
| 2078 | Two Furthest Houses With Different Colors | 🟢 Easy | 1m | The problem is asking us to find the maximum distance between two h… |
| 2079 | Watering Plants | 🟡 Medium | 1m 2s | This problem asks us to simulate watering a row of plants with a wa… |
| 2080 | Range Frequency Queries | 🟡 Medium | 1m 25s | The problem asks us to design a data structure that can efficiently… |
| 2081 | Sum of k-Mirror Numbers | 🔴 Hard | 46s | The problem asks us to find the sum of the n smallest k-mirror numb… |
| 2082 | The Number of Rich Customers | 🟢 Easy | 1m 10s | The problem gives us a database table named Store. Each row in the … |
| 2083 | Substrings That Begin and End With the Same Letter | 🟡 Medium | 42s | The problem asks us to count all substrings in a given string s tha… |
| 2084 | Drop Type 1 Orders for Customers With Type 0 Orders | 🟡 Medium | 1m 39s | In this problem, we are given a database table named Orders. Each r… |
| 2085 | Count Common Words With One Occurrence | 🟢 Easy | 1m 18s | This problem gives us two arrays of strings, words1 and words2. Our… |
| 2086 | Minimum Number of Food Buckets to Feed the Hamsters | 🟡 Medium | 52s | The problem is asking us to place the minimum number of food bucket… |
| 2087 | Minimum Cost Homecoming of a Robot in a Grid | 🟡 Medium | 1m 23s | The problem gives us a robot located on a two dimensional grid. The… |
| 2088 | Count Fertile Pyramids in a Land | 🔴 Hard | 1m 32s | The problem gives us a binary matrix where each cell represents a p… |
| 2089 | Find Target Indices After Sorting Array | 🟢 Easy | 1m 4s | The problem gives us an integer array nums and an integer target. W… |
| 2090 | K Radius Subarray Averages | 🟡 Medium | 1m 11s | The problem asks us to compute a special average for every index in… |
| 2091 | Removing Minimum and Maximum From Array | 🟡 Medium | 1m 18s | The problem gives us a 0-indexed array of distinct integers. Among … |
| 2092 | Find All People With Secret | 🔴 Hard | 1m 49s | The problem describes a network of people who meet at different tim… |
| 2093 | Minimum Cost to Reach City With Discounts | 🟡 Medium | 1m 29s | This problem describes a weighted, undirected graph where each city… |
| 2094 | Finding 3-Digit Even Numbers | 🟢 Easy | 1m 45s | The problem gives us an array named digits, where every element is … |
| 2095 | Delete the Middle Node of a Linked List | 🟡 Medium | 1m 17s | The problem gives us the head of a singly linked list and asks us t… |
| 2096 | Step-By-Step Directions From a Binary Tree Node to Another | 🟡 Medium | 1m 24s | The problem gives us a binary tree where every node contains a uniq… |
| 2097 | Valid Arrangement of Pairs | 🔴 Hard | 1m 23s | This problem gives us a list of directed pairs, where each pair [st… |
| 2098 | Subsequence of Size K With the Largest Even Sum | 🟡 Medium | 1m 6s | The problem asks us to find the largest possible even sum of a subs… |
| 2099 | Find Subsequence of Length K With the Largest Sum | 🟢 Easy | 50s | The problem asks us to find a subsequence of length k from a given … |