LeetCode 21xx
LeetCode problems 2100–2199
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 data structure that continuously tr… |
| 2103 | Rings and Rods | 🟢 Easy | 52s | The problem is asking us to determine how many rods, labeled from 0… |
| 2104 | Sum of Subarray Ranges | 🟡 Medium | 1m 45s | The problem gives us an integer array nums, and asks us to compute … |
| 2105 | Watering Plants II | 🟡 Medium | 1m 36s | In this problem, we are given a row of plants where each plant requ… |
| 2106 | Maximum Fruits Harvested After at Most K Steps | 🔴 Hard | 1m 32s | In this problem, we are given several fruit piles placed on an infi… |
| 2107 | Number of Unique Flavors After Sharing K Candies | 🟡 Medium | 1m 15s | The problem gives us an integer array candies, where each value rep… |
| 2108 | Find First Palindromic String in the Array | 🟢 Easy | 1m 28s | The problem asks us to examine an array of strings, words, and iden… |
| 2109 | Adding Spaces to a String | 🟡 Medium | 39s | The problem requires us to insert spaces into a given string s at s… |
| 2110 | Number of Smooth Descent Periods of a Stock | 🟡 Medium | 1m 8s | This problem is asking us to count all "smooth descent periods" in … |
| 2111 | Minimum Operations to Make the Array K-Increasing | 🔴 Hard | 52s | The problem asks us to transform a given array arr into a K-increas… |
| 2112 | The Airport With the Most Traffic | 🟡 Medium | 55s | This problem asks us to find the airport(s) with the most traffic u… |
| 2113 | Elements in Array After Removing and Replacing Elements | 🟡 Medium | 1m 23s | The problem describes an array that continuously goes through a rep… |
| 2114 | Maximum Number of Words Found in Sentences | 🟢 Easy | 1m 6s | In this problem, we are given an array of strings called sentences.… |
| 2115 | Find All Possible Recipes from Given Supplies | 🟡 Medium | 1m 14s | This problem asks us to determine which recipes can be created when… |
| 2116 | Check if a Parentheses String Can Be Valid | 🟡 Medium | 1m 23s | This problem asks whether a given parentheses string can be transfo… |
| 2117 | Abbreviating the Product of a Range | 🔴 Hard | 1m 5s | We are given two integers, a and b. The task is deceptively small b… |
| 2118 | Build the Equation | 🔴 Hard | 55s | The problem asks us to construct a polynomial equation from a datab… |
| 2119 | A Number After a Double Reversal | 🟢 Easy | 1m 26s | The problem asks us to determine whether a number remains unchanged… |
| 2120 | Execution of All Suffix Instructions Staying in a Grid | 🟡 Medium | 59s | The problem asks us to simulate a robot moving on an n x n grid, st… |
| 2121 | Intervals Between Identical Elements | 🟡 Medium | 1m 14s | You are given a 0-indexed integer array arr. For every index i, you… |
| 2122 | Recover the Original Array | 🔴 Hard | 57s | The problem presents a scenario in which Alice has an original arra… |
| 2123 | Minimum Operations to Remove Adjacent Ones in Matrix | 🔴 Hard | 50s | The problem presents a binary matrix where each element is either 0… |
| 2124 | Check if All A's Appears Before All B's | 🟢 Easy | 1m 56s | The problem gives us a string s that contains only two possible cha… |
| 2125 | Number of Laser Beams in a Bank | 🟡 Medium | 3m 24s | The problem describes a bank floor plan as a binary matrix, represe… |
| 2126 | Destroying Asteroids | 🟡 Medium | 1m 19s | In this problem, we are given the starting mass of a planet and a l… |
| 2127 | Maximum Employees to Be Invited to a Meeting | 🔴 Hard | 5m 52s | This problem describes a group of employees sitting around a circul… |
| 2128 | Remove All Ones With Row and Column Flips | 🟡 Medium | 1m 21s | The problem gives us an m x n binary matrix named grid, where every… |
| 2129 | Capitalize the Title | 🟢 Easy | 1m 5s | The problem asks us to transform the capitalization of every word i… |
| 2130 | Maximum Twin Sum of a Linked List | 🟡 Medium | 7m 7s | The problem gives us a singly linked list with an even number of no… |
| 2131 | Longest Palindrome by Concatenating Two Letter Words | 🟡 Medium | 57s | This problem asks us to construct the longest possible palindrome u… |
| 2132 | Stamping the Grid | 🔴 Hard | 1m 43s | In this problem, we are given a binary matrix called grid. Every ce… |
| 2133 | Check if Every Row and Column Contains All Numbers | 🟢 Easy | 2m 20s | In this problem, we are given an n x n matrix where every value is … |
| 2134 | Minimum Swaps to Group All 1's Together II | 🟡 Medium | 2m 20s | The problem is asking us to find the minimum number of swaps requir… |
| 2135 | Count Words Obtained After Adding a Letter | 🟡 Medium | 47s | The problem requires us to determine how many strings in targetWord… |
| 2136 | Earliest Possible Day of Full Bloom | 🔴 Hard | 46s | The problem presents a scenario where we have n flower seeds, each … |
| 2137 | Pour Water Between Buckets to Make Water Levels Equal | 🟡 Medium | 49s | This problem asks us to equalize the water levels in a series of bu… |
| 2138 | Divide a String Into Groups of Size k | 🟢 Easy | 1m 18s | The problem asks us to split a string into consecutive groups, wher… |
| 2139 | Minimum Moves to Reach Target Score | 🟡 Medium | 1m 12s | The problem asks us to transform the integer 1 into the integer tar… |
| 2140 | Solving Questions With Brainpower | 🟡 Medium | 1m 18s | The problem gives us an array called questions, where each element … |
| 2141 | Maximum Running Time of N Computers | 🔴 Hard | 50s | The problem is asking us to determine the maximum number of minutes… |
| 2142 | The Number of Passengers in Each Bus I | 🟡 Medium | 48s | This problem involves simulating passengers arriving at a bus stati… |
| 2143 | Choose Numbers From Two Arrays in Range | 🔴 Hard | 1m 37s | In this problem, we are given two arrays, nums1 and nums2, both of … |
| 2144 | Minimum Cost of Buying Candies With Discount | 🟢 Easy | 1m 39s | This problem asks us to minimize the total amount of money spent wh… |
| 2145 | Count the Hidden Sequences | 🟡 Medium | 50s | The problem asks us to determine how many possible sequences of int… |
| 2146 | K Highest Ranked Items Within a Price Range | 🟡 Medium | 1m 41s | This problem gives us a 2D grid representing a shop layout. Every c… |
| 2147 | Number of Ways to Divide a Long Corridor | 🔴 Hard | 1m 6s | The problem presents a long corridor represented as a string, where… |
| 2148 | Count Elements With Strictly Smaller and Greater Elements | 🟢 Easy | 1m 15s | The problem gives us an integer array nums and asks us to count how… |
| 2149 | Rearrange Array Elements by Sign | 🟡 Medium | 49s | The problem asks us to rearrange a given integer array nums such th… |
| 2150 | Find All Lonely Numbers in the Array | 🟡 Medium | 1m 32s | The corridor is represented as a string where each character is eit… |
| 2151 | Maximum Good People Based on Statements | 🔴 Hard | 1m | The problem asks us to determine the maximum number of good people … |
| 2152 | Minimum Number of Lines to Cover Points | 🟡 Medium | 54s | This problem asks us to determine the minimum number of straight li… |
| 2153 | The Number of Passengers in Each Bus II | 🔴 Hard | 46s | The problem describes a simulation of passengers arriving at a bus … |
| 2154 | Keep Multiplying Found Values by Two | 🟢 Easy | 1m 7s | This problem asks us to repeatedly search for a value inside an int… |
| 2155 | All Divisions With the Highest Score of a Binary Array | 🟡 Medium | 1m 13s | The problem gives us a binary array nums, meaning every element is … |
| 2156 | Find Substring With Given Hash Value | 🔴 Hard | 1m 33s | This problem asks us to find the earliest substring of length k who… |
| 2157 | Groups of Strings | 🔴 Hard | 56s | The problem asks us to group a list of unique lowercase strings bas… |
| 2158 | Amount of New Area Painted Each Day | 🔴 Hard | 43s | This problem describes a painting scenario represented as a one-dim… |
| 2159 | Order Two Columns Independently | 🟡 Medium | 54s | The problem provides a database table named Data with two integer c… |
| 2160 | Minimum Sum of Four Digit Number After Splitting Digits | 🟢 Easy | 45s | The problem asks us to take a four-digit integer num and split its … |
| 2161 | Partition Array According to Given Pivot | 🟡 Medium | 1m 17s | This problem asks us to rearrange an array around a given pivot val… |
| 2162 | Minimum Cost to Set Cooking Time | 🟡 Medium | 1m 18s | This problem asks us to simulate the process of entering a cooking … |
| 2163 | Minimum Difference in Sums After Removal of Elements | 🔴 Hard | 9m 32s | The array contains exactly 3 n elements. We must remove exactly n e… |
| 2164 | Sort Even and Odd Indices Independently | 🟢 Easy | 2m 19s | The problem asks us to take an integer array nums and sort its elem… |
| 2165 | Smallest Value of the Rearranged Number | 🟡 Medium | 1m 7s | In this problem, we are given an integer num, which may be positive… |
| 2166 | Design Bitset | 🟡 Medium | 1m 29s | This problem asks us to design a custom Bitset data structure that … |
| 2167 | Minimum Time to Remove All Cars Containing Illegal Goods | 🔴 Hard | 47s | The problem presents a binary string s representing a sequence of t… |
| 2168 | Unique Substrings With Equal Digit Frequency | 🟡 Medium | 1m 18s | The problem gives us a string s consisting only of digits from '0' … |
| 2169 | Count Operations to Obtain Zero | 🟢 Easy | 44s | The problem asks us to count the number of operations required to r… |
| 2170 | Minimum Operations to Make the Array Alternating | 🟡 Medium | 49s | The problem requires transforming a given integer array nums into a… |
| 2171 | Removing Minimum Number of Magic Beans | 🟡 Medium | 53s | The problem asks us to remove beans from bags in such a way that al… |
| 2172 | Maximum AND Sum of Array | 🔴 Hard | 1m 34s | This problem asks us to distribute a set of integers into numbered … |
| 2173 | Longest Winning Streak | 🔴 Hard | 1m 1s | This problem is asking us to determine the longest sequence of cons… |
| 2174 | Remove All Ones With Row and Column Flips II | 🟡 Medium | 4m 20s | The problem gives us an m x n binary matrix where every cell contai… |
| 2175 | The Change in Global Rankings | 🟡 Medium | 2m 1s | This problem asks us to determine how the global rankings of nation… |
| 2176 | Count Equal and Divisible Pairs in an Array | 🟢 Easy | 56s | The problem gives us a 0-indexed integer array nums and an integer … |
| 2177 | Find Three Consecutive Integers That Sum to a Given Number | 🟡 Medium | 59s | This problem asks us to determine whether a given integer num can b… |
| 2178 | Maximum Split of Positive Even Integers | 🟡 Medium | 43s | The problem is asking us to take an input integer finalSum and spli… |
| 2179 | Count Good Triplets in an Array | 🔴 Hard | 1m 36s | In this problem, we are given two arrays, nums1 and nums2, each con… |
| 2180 | Count Integers With Even Digit Sum | 🟢 Easy | 45s | The problem asks us to count all positive integers less than or equ… |
| 2181 | Merge Nodes in Between Zeros | 🟡 Medium | 1m 13s | The problem gives us a singly linked list where the values are grou… |
| 2182 | Construct String With Repeat Limit | 🟡 Medium | 1m 41s | The problem asks us to construct a string from the characters of a … |
| 2183 | Count Array Pairs Divisible by K | 🔴 Hard | 1m 13s | The problem gives us an integer array nums and an integer k. We mus… |
| 2184 | Number of Ways to Build Sturdy Brick Wall | 🟡 Medium | 43s | The problem asks us to compute the number of ways to build a wall o… |
| 2185 | Counting Words With a Given Prefix | 🟢 Easy | 1m 16s | The problem gives us two inputs: - An array of strings called words… |
| 2186 | Minimum Number of Steps to Make Two Strings Anagram II | 🟡 Medium | 49s | The problem asks us to find the minimum number of steps required to… |
| 2187 | Minimum Time to Complete Trips | 🟡 Medium | 54s | The problem asks us to determine the minimum time required for a fl… |
| 2188 | Minimum Time to Finish the Race | 🔴 Hard | 5m 35s | The problem asks us to find the minimum total time to complete a ra… |
| 2189 | Number of Ways to Build House of Cards | 🟡 Medium | 1m 1s | The problem is asking us to count the number of distinct ways to bu… |
| 2190 | Most Frequent Number Following Key In an Array | 🟢 Easy | 2m 20s | The problem asks us to find the integer that appears most frequentl… |
| 2191 | Sort the Jumbled Numbers | 🟡 Medium | 37s | The problem asks us to sort an array of integers based on a custom … |
| 2192 | All Ancestors of a Node in a Directed Acyclic Graph | 🟡 Medium | 1m 49s | This problem gives us a Directed Acyclic Graph (DAG) with n nodes l… |
| 2193 | Minimum Number of Moves to Make Palindrome | 🔴 Hard | 1m 15s | This problem asks us to transform a given string into a palindrome … |
| 2194 | Cells in a Range on an Excel Sheet | 🟢 Easy | 39s | This problem is asking us to generate all the Excel-style cell refe… |
| 2195 | Append K Integers With Minimal Sum | 🟡 Medium | 2m 24s | The problem asks us to append k unique positive integers to an exis… |
| 2196 | Create Binary Tree From Descriptions | 🟡 Medium | 10m 30s | The problem asks us to construct a binary tree from a list of relat… |
| 2197 | Replace Non-Coprime Numbers in Array | 🔴 Hard | 2m 21s | The problem asks us to repeatedly replace adjacent non-coprime numb… |
| 2198 | Number of Single Divisor Triplets | 🟡 Medium | 1m 22s | The problem asks us to count how many ordered triplets of distinct … |
| 2199 | Finding the Topic of Each Post | 🔴 Hard | 1m 20s | The problem gives us two database tables, Keywords and Posts. The K… |