Mathematics

Combinatorics

• 3518. Smallest Palindromic Rearrangement II
• 3470. Permutations IV
• 3463. Check If Digits Are Equal in String After Operations II
• 3461. Check If Digits Are Equal in String After Operations I
• 3428. Maximum and Minimum Sums of at Most Size K Subsequences
• 3426. Manhattan Distances of All Arrangements of Pieces
• 3416. Subsequences with a Unique Middle Mode II
• 3405. Count the Number of Arrays with K Matching Adjacent Elements
• 3395. Subsequences with a Unique Middle Mode I
• 3352. Count K-Reducible Numbers Less Than N
• 3343. Count Number of Balanced Permutations
• 3317. Find the Number of Possible Ways for an Event
• 3312. Sorted GCD Pair Queries
• 3272. Find the Count of Good Integers
• 3251. Find the Count of Monotonic Pairs II
• 3250. Find the Count of Monotonic Pairs I
• 3247. Number of Subsequences with Odd Sum
• 3179. Find the N-th Value After K Seconds
• 3154. Find Number of Ways to Reach the K-th Stair
• 3128. Right Triangles
• 3116. Kth Smallest Amount With Single Denomination Combination
• 2963. Count the Number of Good Partitions
• 2954. Count the Number of Infection Sequences
• 2930. Number of Strings Which Can Be Rearranged to Contain Substring
• 2929. Distribute Candies Among Children II
• 2928. Distribute Candies Among Children I
• 2927. Distribute Candies Among Children III
• 2912. Number of Ways to Reach Destination in the Grid
• 2842. Count K-Subsequences of a String With Maximum Beauty
• 2638. Count the Number of K-Free Subsets
• 2597. The Number of Beautiful Subsets
• 2539. Count the Number of Good Subsequences
• 2514. Count Anagrams
• 2400. Number of Ways to Reach a Position After Exactly k Steps
• 2338. Count the Number of Ideal Arrays
• 2221. Find Triangular Sum of an Array
• 2063. Vowels of All Substrings
• 1916. Count Ways to Build Rooms in an Ant Colony
• 1866. Number of Ways to Rearrange Sticks With K Sticks Visible
• 1863. Sum of All Subset XOR Totals
• 1830. Minimum Number of Operations to Make String Sorted
• 1735. Count Ways to Make Array With Product
• 1643. Kth Smallest Instructions
• 1641. Count Sorted Vowel Strings
• 1621. Number of Sets of K Non-Overlapping Line Segments
• 1569. Number of Ways to Reorder Array to Get Same BST
• 1467. Probability of a Two Boxes Having The Same Number of Distinct Balls
• 1359. Count All Valid Pickup and Delivery Options
• 1201. Ugly Number III
• 920. Number of Music Playlists
• 634. Find the Derangement of An Array
• 458. Poor Pigs
• 62. Unique Paths

Enumeration

• 3514. Number of Unique XOR Triplets II
• 3503. Longest Palindrome After Substring Concatenation I
• 3499. Maximize Active Section with Trade I
• 3483. Unique 3-Digit Even Numbers
• 3480. Maximize Subarrays After Removing One Conflicting Pair
• 3470. Permutations IV
• 3445. Maximum Difference Between Even and Odd Frequency II
• 3440. Reschedule Meetings for Maximum Free Time II
• 3435. Frequencies of Shortest Supersequences
• 3434. Maximum Frequency After Subarray Operation
• 3411. Maximum Subarray With Equal Products
• 3404. Count Special Subsequences
• 3403. Find the Lexicographically Largest String From the Box I
• 3398. Smallest Substring With Identical Characters I
• 3389. Minimum Operations to Make Character Frequencies Equal
• 3380. Maximum Area Rectangle With Point Constraints I
• 3371. Identify the Largest Outlier in an Array
• 3345. Smallest Divisible Digit Product I
• 3309. Maximum Possible Number by Binary Concatenation
• 3272. Find the Count of Good Integers
• 3267. Count Almost Equal Pairs II
• 3265. Count Almost Equal Pairs I
• 3257. Maximum Value Sum by Placing Three Rooks II
• 3256. Maximum Value Sum by Placing Three Rooks I
• 3234. Count the Number of Substrings With Dominant Ones
• 3200. Maximum Height of a Triangle
• 3197. Find the Minimum Area to Cover All Ones II
• 3139. Minimum Cost to Equalize Array
• 3132. Find the Integer Added to Array II
• 3127. Make a Square with the Same Color
• 3114. Latest Time You Can Obtain After Replacing Characters
• 3091. Apply Operations to Make Sum of Array Greater Than or Equal to k
• 3044. Most Frequent Prime
• 3027. Find the Number of Ways to Place People II
• 3025. Find the Number of Ways to Place People I
• 3020. Find the Maximum Number of Elements in Subset
• 3010. Divide an Array Into Subarrays With Minimum Cost I
• 3001. Minimum Moves to Capture The Queen
• 2975. Maximum Square Area by Removing Fences From a Field
• 2970. Count the Number of Incremovable Subarrays I
• 2959. Number of Possible Sets of Closing Branches
• 2951. Find the Peaks
• 2947. Count Beautiful Substrings I
• 2934. Minimum Operations to Maximize Last Elements in Arrays
• 2929. Distribute Candies Among Children II
• 2928. Distribute Candies Among Children I
• 2860. Happy Students
• 2844. Minimum Operations to Make a Special Number
• 2843. Count Symmetric Integers
• 2800. Shortest String That Contains Three Strings
• 2778. Sum of Squares of Special Elements
• 2768. Number of Black Blocks
• 2765. Longest Alternating Subarray
• 2761. Prime Pairs With Target Sum
• 2749. Minimum Operations to Make the Integer Zero
• 2735. Collecting Chocolates
• 2708. Maximum Strength of a Group
• 2605. Form Smallest Number From Two Digit Arrays
• 2552. Count Increasing Quadruplets
• 2468. Split Message Based on Limit
• 2443. Sum of Number and Its Reverse
• 2440. Create Components With Same Value
• 2437. Number of Valid Clock Times
• 2427. Number of Common Factors
• 2417. Closest Fair Integer
• 2397. Maximum Rows Covered by Columns
• 2367. Number of Arithmetic Triplets
• 2310. Sum of Numbers With Units Digit K
• 2309. Greatest English Letter in Upper and Lower Case
• 2306. Naming a Company
• 2261. K Divisible Elements Subarrays
• 2259. Remove Digit From Number to Maximize Result
• 2249. Count Lattice Points Inside a Circle
• 2242. Maximum Score of a Node Sequence
• 2240. Number of Ways to Buy Pens and Pencils
• 2234. Maximum Total Beauty of the Gardens
• 2232. Minimize Result by Adding Parentheses to Expression
• 2212. Maximum Points in an Archery Competition
• 2171. Removing Minimum Number of Magic Beans
• 2162. Minimum Cost to Set Cooking Time
• 2151. Maximum Good People Based on Statements
• 2122. Recover the Original Array
• 2094. Finding 3-Digit Even Numbers
• 2081. Sum of k-Mirror Numbers
• 2048. Next Greater Numerically Balanced Number
• 2044. Count Number of Maximum Bitwise-OR Subsets
• 2025. Maximum Number of Ways to Partition an Array
• 2018. Check if Word Can Be Placed In Crossword
• 2014. Longest Subsequence Repeated k Times
• 1999. Smallest Greater Multiple Made of Two Digits
• 1995. Count Special Quadruplets
• 1958. Check if Move is Legal
• 1956. Minimum Time For K Virus Variants to Spread
• 1952. Three Divisors
• 1925. Count Square Sum Triples
• 1863. Sum of All Subset XOR Totals
• 1638. Count Substrings That Differ by One Character
• 1625. Lexicographically Smallest String After Applying Operations
• 1620. Coordinate With Maximum Network Quality
• 1617. Count Subtrees With Max Distance Between Cities
• 1601. Maximum Number of Achievable Transfer Requests
• 1566. Detect Pattern of Length M Repeated K or More Times
• 1534. Count Good Triplets
• 1291. Sequential Digits
• 970. Powerful Integers
• 949. Largest Time for Given Digits
• 906. Super Palindromes
• 869. Reordered Power of 2
• 845. Longest Mountain in Array
• 829. Consecutive Numbers Sum
• 816. Ambiguous Coordinates
• 800. Similar RGB Color
• 681. Next Closest Time
• 479. Largest Palindrome Product
• 204. Count Primes

Geometry

• 3382. Maximum Area Rectangle With Point Constraints II
• 3380. Maximum Area Rectangle With Point Constraints I
• 3235. Check if the Rectangle Corner Is Reachable
• 3102. Minimize Manhattan Distances
• 3047. Find the Largest Area of Square Inside Two Rectangles
• 3027. Find the Number of Ways to Place People II
• 3025. Find the Number of Ways to Place People I
• 3009. Maximum Number of Intersections on the Chart
• 2613. Beautiful Pairs
• 2481. Minimum Cuts to Divide a Circle
• 2280. Minimum Lines to Represent a Line Chart
• 2249. Count Lattice Points Inside a Circle
• 2152. Minimum Number of Lines to Cover Points
• 2101. Detonate the Maximum Bombs
• 1956. Minimum Time For K Virus Variants to Spread
• 1924. Erect the Fence II
• 1828. Queries on Number of Points Inside a Circle
• 1610. Maximum Number of Visible Points
• 1515. Best Position for a Service Centre
• 1453. Maximum Number of Darts Inside of a Circular Dartboard
• 1401. Circle and Rectangle Overlapping
• 1266. Minimum Time Visiting All Points
• 1232. Check If It Is a Straight Line
• 1037. Valid Boomerang
• 1030. Matrix Cells in Distance Order
• 973. K Closest Points to Origin
• 963. Minimum Area Rectangle II
• 939. Minimum Area Rectangle
• 892. Surface Area of 3D Shapes
• 883. Projection Area of 3D Shapes
• 858. Mirror Reflection
• 836. Rectangle Overlap
• 812. Largest Triangle Area
• 593. Valid Square
• 587. Erect the Fence
• 478. Generate Random Point in a Circle
• 469. Convex Polygon
• 335. Self Crossing
• 223. Rectangle Area
• 149. Max Points on a Line

Math

• 3525. Find X Value of Array II
• 3524. Find X Value of Array I
• 3519. Count Numbers with Non-Decreasing Digits
• 3518. Smallest Palindromic Rearrangement II
• 3516. Find Closest Person
• 3514. Number of Unique XOR Triplets II
• 3513. Number of Unique XOR Triplets I
• 3512. Minimum Operations to Make Array Sum Divisible by K
• 3506. Find Time Required to Eliminate Bacterial Strains
• 3505. Minimum Operations to Make Elements Within K Subarrays Equal
• 3495. Minimum Operations to Make Array Elements Zero
• 3492. Maximum Containers on a Ship
• 3470. Permutations IV
• 3468. Find the Number of Copy Arrays
• 3463. Check If Digits Are Equal in String After Operations II
• 3461. Check If Digits Are Equal in String After Operations I
• 3444. Minimum Increments for Target Multiples in an Array
• 3443. Maximum Manhattan Distance After K Changes
• 3433. Count Mentions Per User
• 3432. Count Partitions with Even Sum Difference
• 3430. Maximum and Minimum Sums of at Most Size K Subarrays
• 3428. Maximum and Minimum Sums of at Most Size K Subsequences
• 3426. Manhattan Distances of All Arrangements of Pieces
• 3422. Minimum Operations to Make Subarray Elements Equal
• 3416. Subsequences with a Unique Middle Mode II
• 3411. Maximum Subarray With Equal Products
• 3405. Count the Number of Arrays with K Matching Adjacent Elements
• 3404. Count Special Subsequences
• 3395. Subsequences with a Unique Middle Mode I
• 3382. Maximum Area Rectangle With Point Constraints II
• 3380. Maximum Area Rectangle With Point Constraints I
• 3378. Count Connected Components in LCM Graph
• 3377. Digit Operations to Make Two Integers Equal
• 3370. Smallest Number With All Set Bits
• 3360. Stone Removal Game
• 3352. Count K-Reducible Numbers Less Than N
• 3348. Smallest Divisible Digit Product II
• 3345. Smallest Divisible Digit Product I
• 3343. Count Number of Balanced Permutations
• 3337. Total Characters in String After Transformations II
• 3336. Find the Number of Subsequences With Equal GCD
• 3335. Total Characters in String After Transformations I
• 3334. Find the Maximum Factor Score of Array
• 3326. Minimum Division Operations to Make Array Non Decreasing
• 3317. Find the Number of Possible Ways for an Event
• 3312. Sorted GCD Pair Queries
• 3307. Find the K-th Character in String Game II
• 3304. Find the K-th Character in String Game I
• 3300. Minimum Element After Replacement With Digit Sum
• 3296. Minimum Number of Seconds to Make Mountain Height Zero
• 3289. The Two Sneaky Numbers of Digitville
• 3283. Maximum Number of Moves to Kill All Pawns
• 3280. Convert Date to Binary
• 3274. Check if Two Chessboard Squares Have the Same Color
• 3272. Find the Count of Good Integers
• 3270. Find the Key of the Numbers
• 3264. Final Array State After K Multiplication Operations I
• 3260. Find the Largest Palindrome Divisible by K
• 3251. Find the Count of Monotonic Pairs II
• 3250. Find the Count of Monotonic Pairs I
• 3247. Number of Subsequences with Odd Sum
• 3235. Check if the Rectangle Corner Is Reachable
• 3233. Find the Count of Numbers Which Are Not Special
• 3232. Find if Digit Game Can Be Won
• 3227. Vowels Game in a String
• 3222. Find the Winning Player in Coin Game
• 3190. Find Minimum Operations to Make All Elements Divisible by Three
• 3179. Find the N-th Value After K Seconds
• 3178. Find the Child Who Has the Ball After K Seconds
• 3155. Maximum Number of Upgradable Servers
• 3154. Find Number of Ways to Reach the K-th Stair
• 3153. Sum of Digit Differences of All Pairs
• 3128. Right Triangles
• 3116. Kth Smallest Amount With Single Denomination Combination
• 3115. Maximum Prime Difference
• 3102. Minimize Manhattan Distances
• 3101. Count Alternating Subarrays
• 3100. Water Bottles II
• 3099. Harshad Number
• 3091. Apply Operations to Make Sum of Array Greater Than or Equal to k
• 3084. Count Substrings Starting and Ending with Given Character
• 3079. Find the Sum of Encrypted Integers
• 3047. Find the Largest Area of Square Inside Two Rectangles
• 3044. Most Frequent Prime
• 3032. Count Numbers With Unique Digits II
• 3027. Find the Number of Ways to Place People II
• 3025. Find the Number of Ways to Place People I
• 3024. Type of Triangle
• 3021. Alice and Bob Playing Flower Game
• 3014. Minimum Number of Pushes to Type Word I
• 3012. Minimize Length of Array Using Operations
• 3009. Maximum Number of Intersections on the Chart
• 3001. Minimum Moves to Capture The Queen
• 2999. Count the Number of Powerful Integers
• 2979. Most Expensive Item That Can Not Be Bought
• 2967. Minimum Cost to Make Array Equalindromic
• 2965. Find Missing and Repeated Values
• 2963. Count the Number of Good Partitions
• 2961. Double Modular Exponentiation
• 2954. Count the Number of Infection Sequences
• 2949. Count Beautiful Substrings II
• 2947. Count Beautiful Substrings I
• 2946. Matrix Similarity After Cyclic Shifts
• 2941. Maximum GCD-Sum of a Subarray
• 2939. Maximum Xor Product
• 2930. Number of Strings Which Can Be Rearranged to Contain Substring
• 2929. Distribute Candies Among Children II
• 2928. Distribute Candies Among Children I
• 2927. Distribute Candies Among Children III
• 2912. Number of Ways to Reach Destination in the Grid
• 2894. Divisible and Non-divisible Sums Difference
• 2868. The Wording Game
• 2867. Count Valid Paths in a Tree
• 2864. Maximum Odd Binary Number
• 2862. Maximum Element-Sum of a Complete Subset of Indices
• 2851. String Transformation
• 2849. Determine if a Cell Is Reachable at a Given Time
• 2847. Smallest Number With Given Digit Product
• 2844. Minimum Operations to Make a Special Number
• 2843. Count Symmetric Integers
• 2842. Count K-Subsequences of a String With Maximum Beauty
• 2834. Find the Minimum Possible Sum of a Beautiful Array
• 2829. Determine the Minimum Sum of a k-avoiding Array
• 2827. Number of Beautiful Integers in the Range
• 2818. Apply Operations to Maximize Score
• 2816. Double a Number Represented as a Linked List
• 2807. Insert Greatest Common Divisors in Linked List
• 2806. Account Balance After Rounded Purchase
• 2802. Find The K-th Lucky Number
• 2790. Maximum Number of Groups With Increasing Length
• 2769. Find the Maximum Achievable Number
• 2761. Prime Pairs With Target Sum
• 2750. Ways to Split Array Into Good Subarrays
• 2748. Number of Beautiful Pairs
• 2745. Construct the Longest New String
• 2739. Total Distance Traveled
• 2729. Check if The Number is Fascinating
• 2719. Count of Integers
• 2709. Greatest Common Divisor Traversal
• 2698. Find the Punishment Number of an Integer
• 2681. Power of Heroes
• 2654. Minimum Number of Operations to Make All Array Elements Equal to 1
• 2652. Sum Multiples
• 2651. Calculate Delayed Arrival Time
• 2647. Color the Triangle Red
• 2638. Count the Number of K-Free Subsets
• 2614. Prime In Diagonal
• 2613. Beautiful Pairs
• 2607. Make K-Subarray Sums Equal
• 2601. Prime Subtraction Operation
• 2600. K Items With the Maximum Sum
• 2598. Smallest Missing Non-negative Integer After Operations
• 2597. The Number of Beautiful Subsets
• 2591. Distribute Money to Maximum Children
• 2584. Split the Array to Make Coprime Products
• 2582. Pass the Pillow
• 2579. Count Total Number of Colored Cells
• 2578. Split With Minimum Sum
• 2575. Find the Divisibility Array of a String
• 2572. Count the Number of Square-Free Subsets
• 2566. Maximum Difference by Remapping a Digit
• 2550. Count Collisions of Monkeys on a Polygon
• 2549. Count Distinct Numbers on Board
• 2544. Alternating Digit Sum
• 2543. Check if Point Is Reachable
• 2541. Minimum Operations to Make Array Equal II
• 2539. Count the Number of Good Subsequences
• 2535. Difference Between Element Sum and Digit Sum of an Array
• 2527. Find Xor-Beauty of Array
• 2525. Categorize Box According to Criteria
• 2524. Maximum Frequency Score of a Subarray
• 2523. Closest Prime Numbers in Range
• 2521. Distinct Prime Factors of Product of Array
• 2520. Count the Digits That Divide a Number
• 2514. Count Anagrams
• 2513. Minimize the Maximum of Two Arrays
• 2507. Smallest Value After Replacing With Sum of Prime Factors
• 2505. Bitwise OR of All Subsequence Sums
• 2495. Number of Subarrays Having Even Product
• 2489. Number of Substrings With Fixed Ratio
• 2485. Find the Pivot Integer
• 2481. Minimum Cuts to Divide a Circle
• 2470. Number of Subarrays With LCM Equal to K
• 2469. Convert the Temperature
• 2464. Minimum Subarrays in a Valid Split
• 2457. Minimum Addition to Make Integer Beautiful
• 2455. Average Value of Even Numbers That Are Divisible by Three
• 2450. Number of Distinct Binary Strings After Applying Operations
• 2447. Number of Subarrays With GCD Equal to K
• 2443. Sum of Number and Its Reverse
• 2442. Count Number of Distinct Integers After Reverse Operations
• 2440. Create Components With Same Value
• 2436. Minimum Split Into Subarrays With GCD Greater Than One
• 2427. Number of Common Factors
• 2417. Closest Fair Integer
• 2413. Smallest Even Multiple
• 2409. Count Days Spent Together
• 2400. Number of Ways to Reach a Position After Exactly k Steps
• 2396. Strictly Palindromic Number
• 2393. Count Strictly Increasing Subarrays
• 2376. Count Special Integers
• 2366. Minimum Replacements to Sort the Array
• 2364. Count Number of Bad Pairs
• 2358. Maximum Number of Groups Entering a Competition
• 2348. Number of Zero-Filled Subarrays
• 2344. Minimum Deletions to Make Array Divisible
• 2338. Count the Number of Ideal Arrays
• 2317. Maximum XOR After Operations
• 2310. Sum of Numbers With Units Digit K
• 2280. Minimum Lines to Represent a Line Chart
• 2269. Find the K-Beauty of a Number
• 2266. Count Number of Texts
• 2249. Count Lattice Points Inside a Circle
• 2240. Number of Ways to Buy Pens and Pencils
• 2235. Add Two Integers
• 2221. Find Triangular Sum of an Array
• 2217. Find Palindrome With Fixed Length
• 2198. Number of Single Divisor Triplets
• 2197. Replace Non-Coprime Numbers in Array
• 2195. Append K Integers With Minimal Sum
• 2189. Number of Ways to Build House of Cards
• 2183. Count Array Pairs Divisible by K
• 2180. Count Integers With Even Digit Sum
• 2178. Maximum Split of Positive Even Integers
• 2177. Find Three Consecutive Integers That Sum to a Given Number
• 2169. Count Operations to Obtain Zero
• 2165. Smallest Value of the Rearranged Number
• 2162. Minimum Cost to Set Cooking Time
• 2160. Minimum Sum of Four Digit Number After Splitting Digits
• 2152. Minimum Number of Lines to Cover Points
• 2147. Number of Ways to Divide a Long Corridor
• 2139. Minimum Moves to Reach Target Score
• 2128. Remove All Ones With Row and Column Flips
• 2125. Number of Laser Beams in a Bank
• 2119. A Number After a Double Reversal
• 2117. Abbreviating the Product of a Range
• 2110. Number of Smooth Descent Periods of a Stock
• 2101. Detonate the Maximum Bombs
• 2083. Substrings That Begin and End With the Same Letter
• 2081. Sum of k-Mirror Numbers
• 2063. Vowels of All Substrings
• 2048. Next Greater Numerically Balanced Number
• 2038. Remove Colored Pieces if Both Neighbors are the Same Color
• 2033. Minimum Operations to Make a Uni-Value Grid
• 2029. Stone Game IX
• 2028. Find Missing Observations
• 2019. The Score of Students Solving Math Expression
• 2005. Subtree Removal Game with Fibonacci Tree
• 2001. Number of Pairs of Interchangeable Rectangles
• 1999. Smallest Greater Multiple Made of Two Digits
• 1998. GCD Sort of an Array
• 1994. The Number of Good Subsets
• 1979. Find Greatest Common Divisor of Array
• 1969. Minimum Non-Zero Product of the Array Elements
• 1956. Minimum Time For K Virus Variants to Spread
• 1954. Minimum Garden Perimeter to Collect Enough Apples
• 1952. Three Divisors
• 1927. Sum Game
• 1925. Count Square Sum Triples
• 1924. Erect the Fence II
• 1922. Count Good Numbers
• 1916. Count Ways to Build Rooms in an Ant Colony
• 1908. Game of Nim
• 1904. The Number of Full Rounds You Have Played
• 1903. Largest Odd Number in String
• 1896. Minimum Cost to Change the Final Value of Expression
• 1884. Egg Drop With 2 Eggs and N Floors
• 1878. Get Biggest Three Rhombus Sums in a Grid
• 1872. Stone Game VIII
• 1866. Number of Ways to Rearrange Sticks With K Sticks Visible
• 1863. Sum of All Subset XOR Totals
• 1862. Sum of Floored Pairs
• 1860. Incremental Memory Leak
• 1840. Maximum Building Height
• 1837. Sum of Digits in Base K
• 1835. Find XOR Sum of All Pairs Bitwise AND
• 1830. Minimum Number of Operations to Make String Sorted
• 1828. Queries on Number of Points Inside a Circle
• 1823. Find the Winner of the Circular Game
• 1822. Sign of the Product of an Array
• 1819. Number of Different Subsequences GCDs
• 1814. Count Nice Pairs in an Array
• 1812. Determine Color of a Chessboard Square
• 1808. Maximize Number of Nice Divisors
• 1806. Minimum Number of Operations to Reinitialize a Permutation
• 1799. Maximize Score After N Operations
• 1780. Check if Number is a Sum of Powers of Three
• 1776. Car Fleet II
• 1766. Tree of Coprimes
• 1759. Count Number of Homogenous Substrings
• 1753. Maximum Score From Removing Stones
• 1742. Maximum Number of Balls in a Box
• 1739. Building Boxes
• 1735. Count Ways to Make Array With Product
• 1728. Cat and Mouse II
• 1716. Calculate Money in Leetcode Bank
• 1690. Stone Game VII
• 1688. Count of Matches in Tournament
• 1686. Stone Game VI
• 1685. Sum of Absolute Differences in a Sorted Array
• 1680. Concatenation of Consecutive Binary Numbers
• 1648. Sell Diminishing-Valued Colored Balls
• 1643. Kth Smallest Instructions
• 1641. Count Sorted Vowel Strings
• 1634. Add Two Polynomials Represented as Linked Lists
• 1628. Design an Expression Tree With Evaluate Function
• 1627. Graph Connectivity With Threshold
• 1622. Fancy Sequence
• 1621. Number of Sets of K Non-Overlapping Line Segments
• 1610. Maximum Number of Visible Points
• 1588. Sum of All Odd Length Subarrays
• 1577. Number of Ways Where Square of Number Is Equal to Product of Two Numbers
• 1573. Number of Ways to Split a String
• 1569. Number of Ways to Reorder Array to Get Same BST
• 1563. Stone Game V
• 1561. Maximum Number of Coins You Can Get
• 1551. Minimum Operations to Make Array Equal
• 1538. Guess the Majority in a Hidden Array
• 1524. Number of Sub-arrays With Odd Sum
• 1523. Count Odd Numbers in an Interval Range
• 1518. Water Bottles
• 1515. Best Position for a Service Centre
• 1513. Number of Substrings With Only 1s
• 1512. Number of Good Pairs
• 1510. Stone Game IV
• 1492. The kth Factor of n
• 1486. XOR Operation in an Array
• 1478. Allocate Mailboxes
• 1467. Probability of a Two Boxes Having The Same Number of Distinct Balls
• 1453. Maximum Number of Darts Inside of a Circular Dartboard
• 1447. Simplified Fractions
• 1442. Count Triplets That Can Form Two Arrays of Equal XOR
• 1432. Max Difference You Can Get From Changing an Integer
• 1427. Perform String Shifts
• 1414. Find the Minimum Number of Fibonacci Numbers Whose Sum Is K
• 1406. Stone Game III
• 1401. Circle and Rectangle Overlapping
• 1399. Count Largest Group
• 1390. Four Divisors
• 1363. Largest Multiple of Three
• 1362. Closest Divisors
• 1360. Number of Days Between Two Dates
• 1359. Count All Valid Pickup and Delivery Options
• 1352. Product of the Last K Numbers
• 1344. Angle Between Hands of a Clock
• 1342. Number of Steps to Reduce a Number to Zero
• 1330. Reverse Subarray To Maximize Array Value
• 1323. Maximum 69 Number
• 1317. Convert Integer to the Sum of Two No-Zero Integers
• 1307. Verbal Arithmetic Puzzle
• 1304. Find N Unique Integers Sum up to Zero
• 1295. Find Numbers with Even Number of Digits
• 1290. Convert Binary Number in a Linked List to Integer
• 1281. Subtract the Product and Sum of Digits of an Integer
• 1276. Number of Burgers with No Waste of Ingredients
• 1271. Hexspeak
• 1266. Minimum Time Visiting All Points
• 1259. Handshakes That Don't Cross
• 1256. Encode Number
• 1252. Cells with Odd Values in a Matrix
• 1250. Check If It Is a Good Array
• 1248. Count Number of Nice Subarrays
• 1247. Minimum Swaps to Make Strings Equal
• 1238. Circular Permutation in Binary Representation
• 1237. Find Positive Integer Solution for a Given Equation
• 1232. Check If It Is a Straight Line
• 1230. Toss Strange Coins
• 1228. Missing Number In Arithmetic Progression
• 1227. Airplane Seat Assignment Probability
• 1217. Minimum Cost to Move Chips to The Same Position
• 1215. Stepping Numbers
• 1201. Ugly Number III
• 1199. Minimum Time to Build Blocks
• 1185. Day of the Week
• 1183. Maximum Number of Ones
• 1180. Count Substrings with Only One Distinct Letter
• 1175. Prime Arrangements
• 1154. Day of the Year
• 1140. Stone Game II
• 1137. N-th Tribonacci Number
• 1134. Armstrong Number
• 1131. Maximum of Absolute Value Expression
• 1118. Number of Days in a Month
• 1104. Path In Zigzag Labelled Binary Tree
• 1103. Distribute Candies to People
• 1093. Statistics from a Large Sample
• 1088. Confusing Number II
• 1085. Sum of Digits in the Minimum Number
• 1073. Adding Two Negabinary Numbers
• 1071. Greatest Common Divisor of Strings
• 1067. Digit Count in Range
• 1058. Minimize Rounding Error to Meet Target
• 1056. Confusing Number
• 1041. Robot Bounded In Circle
• 1040. Moving Stones Until Consecutive II
• 1037. Valid Boomerang
• 1033. Moving Stones Until Consecutive
• 1030. Matrix Cells in Distance Order
• 1025. Divisor Game
• 1017. Convert to Base -2
• 1015. Smallest Integer Divisible by K
• 1012. Numbers With Repeated Digits
• 1006. Clumsy Factorial
• 996. Number of Squareful Arrays
• 991. Broken Calculator
• 989. Add to Array-Form of Integer
• 976. Largest Perimeter Triangle
• 973. K Closest Points to Origin
• 972. Equal Rational Numbers
• 970. Powerful Integers
• 964. Least Operators to Express Number
• 963. Minimum Area Rectangle II
• 957. Prison Cells After N Days
• 952. Largest Component Size by Common Factor
• 939. Minimum Area Rectangle
• 932. Beautiful Array
• 927. Three Equal Parts
• 920. Number of Music Playlists
• 914. X of a Kind in a Deck of Cards
• 913. Cat and Mouse
• 910. Smallest Range II
• 908. Smallest Range I
• 906. Super Palindromes
• 902. Numbers At Most N Given Digit Set
• 899. Orderly Queue
• 892. Surface Area of 3D Shapes
• 891. Sum of Subsequence Widths
• 887. Super Egg Drop
• 883. Projection Area of 3D Shapes
• 878. Nth Magical Number
• 877. Stone Game
• 869. Reordered Power of 2
• 866. Prime Palindrome
• 858. Mirror Reflection
• 843. Guess the Word
• 840. Magic Squares In Grid
• 837. New 21 Game
• 836. Rectangle Overlap
• 829. Consecutive Numbers Sum
• 812. Largest Triangle Area
• 810. Chalkboard XOR Game
• 808. Soup Servings
• 805. Split Array With Same Average
• 800. Similar RGB Color
• 793. Preimage Size of Factorial Zeroes Function
• 789. Escape The Ghosts
• 788. Rotated Digits
• 782. Transform to Chessboard
• 781. Rabbits in Forest
• 780. Reaching Points
• 779. K-th Symbol in Grammar
• 775. Global and Local Inversions
• 772. Basic Calculator III
• 770. Basic Calculator IV
• 762. Prime Number of Set Bits in Binary Representation
• 754. Reach a Number
• 750. Number Of Corner Rectangles
• 738. Monotone Increasing Digits
• 728. Self Dividing Numbers
• 710. Random Pick with Blacklist
• 679. 24 Game
• 672. Bulb Switcher II
• 670. Maximum Swap
• 668. Kth Smallest Number in Multiplication Table
• 667. Beautiful Arrangement II
• 660. Remove 9
• 651. 4 Keys Keyboard
• 650. 2 Keys Keyboard
• 640. Solve the Equation
• 634. Find the Derangement of An Array
• 633. Sum of Square Numbers
• 628. Maximum Product of Three Numbers
• 625. Minimum Factorization
• 598. Range Addition II
• 593. Valid Square
• 592. Fraction Addition and Subtraction
• 587. Erect the Fence
• 573. Squirrel Simulation
• 564. Find the Closest Palindrome
• 556. Next Greater Element III
• 553. Optimal Division
• 539. Minimum Time Difference
• 537. Complex Number Multiplication
• 523. Continuous Subarray Sum
• 519. Random Flip Matrix
• 509. Fibonacci Number
• 507. Perfect Number
• 504. Base 7
• 497. Random Point in Non-overlapping Rectangles
• 492. Construct the Rectangle
• 486. Predict the Winner
• 483. Smallest Good Base
• 479. Largest Palindrome Product
• 478. Generate Random Point in a Circle
• 477. Total Hamming Distance
• 470. Implement Rand10() Using Rand7()
• 469. Convex Polygon
• 464. Can I Win
• 462. Minimum Moves to Equal Array Elements II
• 458. Poor Pigs
• 453. Minimum Moves to Equal Array Elements
• 447. Number of Boomerangs
• 445. Add Two Numbers II
• 441. Arranging Coins
• 423. Reconstruct Original Digits from English
• 415. Add Strings
• 412. Fizz Buzz
• 405. Convert a Number to Hexadecimal
• 400. Nth Digit
• 398. Random Pick Index
• 396. Rotate Function
• 390. Elimination Game
• 384. Shuffle an Array
• 382. Linked List Random Node
• 381. Insert Delete GetRandom O(1) - Duplicates allowed
• 380. Insert Delete GetRandom O(1)
• 375. Guess Number Higher or Lower II
• 372. Super Pow
• 371. Sum of Two Integers
• 369. Plus One Linked List
• 368. Largest Divisible Subset
• 367. Valid Perfect Square
• 365. Water and Jug Problem
• 360. Sort Transformed Array
• 357. Count Numbers with Unique Digits
• 356. Line Reflection
• 343. Integer Break
• 342. Power of Four
• 335. Self Crossing
• 326. Power of Three
• 319. Bulb Switcher
• 313. Super Ugly Number
• 296. Best Meeting Point
• 294. Flip Game II
• 292. Nim Game
• 282. Expression Add Operators
• 279. Perfect Squares
• 273. Integer to English Words
• 268. Missing Number
• 264. Ugly Number II
• 263. Ugly Number
• 258. Add Digits
• 241. Different Ways to Add Parentheses
• 233. Number of Digit One
• 231. Power of Two
• 227. Basic Calculator II
• 224. Basic Calculator
• 223. Rectangle Area
• 204. Count Primes
• 202. Happy Number
• 189. Rotate Array
• 172. Factorial Trailing Zeroes
• 171. Excel Sheet Column Number
• 168. Excel Sheet Column Title
• 166. Fraction to Recurring Decimal
• 150. Evaluate Reverse Polish Notation
• 149. Max Points on a Line
• 96. Unique Binary Search Trees
• 89. Gray Code
• 70. Climbing Stairs
• 69. Sqrt(x)
• 67. Add Binary
• 66. Plus One
• 62. Unique Paths
• 60. Permutation Sequence
• 50. Pow(x, n)
• 48. Rotate Image
• 43. Multiply Strings
• 29. Divide Two Integers
• 13. Roman to Integer
• 12. Integer to Roman
• 9. Palindrome Number
• 7. Reverse Integer
• 2. Add Two Numbers

Number Theory

• 3463. Check If Digits Are Equal in String After Operations II
• 3461. Check If Digits Are Equal in String After Operations I
• 3444. Minimum Increments for Target Multiples in an Array
• 3411. Maximum Subarray With Equal Products
• 3378. Count Connected Components in LCM Graph
• 3377. Digit Operations to Make Two Integers Equal
• 3348. Smallest Divisible Digit Product II
• 3336. Find the Number of Subsequences With Equal GCD
• 3334. Find the Maximum Factor Score of Array
• 3326. Minimum Division Operations to Make Array Non Decreasing
• 3312. Sorted GCD Pair Queries
• 3260. Find the Largest Palindrome Divisible by K
• 3233. Find the Count of Numbers Which Are Not Special
• 3116. Kth Smallest Amount With Single Denomination Combination
• 3115. Maximum Prime Difference
• 3044. Most Frequent Prime
• 3012. Minimize Length of Array Using Operations
• 2979. Most Expensive Item That Can Not Be Bought
• 2949. Count Beautiful Substrings II
• 2947. Count Beautiful Substrings I
• 2941. Maximum GCD-Sum of a Subarray
• 2867. Count Valid Paths in a Tree
• 2862. Maximum Element-Sum of a Complete Subset of Indices
• 2818. Apply Operations to Maximize Score
• 2807. Insert Greatest Common Divisors in Linked List
• 2761. Prime Pairs With Target Sum
• 2748. Number of Beautiful Pairs
• 2709. Greatest Common Divisor Traversal
• 2654. Minimum Number of Operations to Make All Array Elements Equal to 1
• 2614. Prime In Diagonal
• 2607. Make K-Subarray Sums Equal
• 2601. Prime Subtraction Operation
• 2584. Split the Array to Make Coprime Products
• 2543. Check if Point Is Reachable
• 2523. Closest Prime Numbers in Range
• 2521. Distinct Prime Factors of Product of Array
• 2513. Minimize the Maximum of Two Arrays
• 2507. Smallest Value After Replacing With Sum of Prime Factors
• 2470. Number of Subarrays With LCM Equal to K
• 2464. Minimum Subarrays in a Valid Split
• 2447. Number of Subarrays With GCD Equal to K
• 2436. Minimum Split Into Subarrays With GCD Greater Than One
• 2427. Number of Common Factors
• 2413. Smallest Even Multiple
• 2344. Minimum Deletions to Make Array Divisible
• 2338. Count the Number of Ideal Arrays
• 2280. Minimum Lines to Represent a Line Chart
• 2197. Replace Non-Coprime Numbers in Array
• 2183. Count Array Pairs Divisible by K
• 2001. Number of Pairs of Interchangeable Rectangles
• 1998. GCD Sort of an Array
• 1979. Find Greatest Common Divisor of Array
• 1952. Three Divisors
• 1819. Number of Different Subsequences GCDs
• 1808. Maximize Number of Nice Divisors
• 1799. Maximize Score After N Operations
• 1766. Tree of Coprimes
• 1735. Count Ways to Make Array With Product
• 1627. Graph Connectivity With Threshold
• 1492. The kth Factor of n
• 1447. Simplified Fractions
• 1250. Check If It Is a Good Array
• 1201. Ugly Number III
• 952. Largest Component Size by Common Factor
• 914. X of a Kind in a Deck of Cards
• 866. Prime Palindrome
• 858. Mirror Reflection
• 258. Add Digits
• 204. Count Primes

Probability and Statistics

• 1467. Probability of a Two Boxes Having The Same Number of Distinct Balls
• 1230. Toss Strange Coins
• 1227. Airplane Seat Assignment Probability
• 1093. Statistics from a Large Sample
• 837. New 21 Game
• 808. Soup Servings
• 470. Implement Rand10() Using Rand7()