LeetCode Algorithms 🔒 = Subscription Content Problems # Name Solution Youtube 1 Two Sum 2 Add Two Numbers 3 Longest Substring Without Repeating Characters 5 Longest Palindromic Substring 6 Zigzag Conversion 7 Reverse Integer 8 String to Integer (atoi) 9 Palindrome Number 11 Container With Most Water 12 Integer to Roman 13 Roman To Integer 14 Longest Common Prefix 15 3Sum 16 3Sum Closest 17 Letter Combinations of a Phone Number 18 4Sum 19 Remove Nth Node From End of List 20 ValidParentheses 21 Merge 2 Sorted Lists 22 Generate Parentheses 24 Swap Nodes in Pairs 25 Reverse Nodes in k-Group 26 Remove Duplicates From Sorted Array 27 Remove Element 28 Needle in Haystack 29 Divide Two Integers 30 Substring with Concatenation of All Words 31 Next Permutation 33 Search in Rotated Sorted Array 34 Find First and Last Position of Element in Sorted Array 35 Search Inserted Position 36 Valid Sudoku 37 Sudoku Solver 38 Count and Say 39 Combination Sum 40 Combination Sum II 41 First Missing Positive 42 Trapping Rain Water 43 Multiply Strings 45 Jump Game II 46 Permutations 47 Permutations II 48 Rotate Image 49 Group Anagrams 50 Pow(x,n) 51 N-Queens 51 N-Queens II 53 Maximum SubArray 54 Spiral Matrix 55 Jump Game 56 Merge Intervals 57 Insert Interval 58 Length of Last Word 59 Spiral Matrix II 61 Rotate List 62 Unique Paths 63 Unique Paths II 64 Minimum Path Sum 66 Plus One 67 Add Binary 68 Text Justification 69 Sqrt(x) 70 Climbing Stairs 71 Simplify Path 72 Edit Distance 73 Set Matrix Zeroes 74 Search a 2D Matrix 75 Sort Colors 77 Combinations 78 Subsets 79 Word Search 80 Remove Duplicates from Sorted Array II 81 Search in Rotated Sorted Array II 82 Remove Duplicates from Sorted List II 83 Remove Duplicates from Sorted List 86 Partition List 87 Scramble String 88 Merge Sorted Array 89 Gray Code 90 Subsets II 91 Decode Ways 92 Reverse Linked List II 93 Restore IP Addresses 94 Binary Tree Inorder Traversal 95 Unique Binary Search Trees II 96 Unique Binary Search Trees 97 Interleaving String 98 Validate Binary Search Tree 99 Recover Binary Search Tree 100 Same Tree 101 Symmetric Tree 102 Binary Tree Level Order Traversal 103 Binary Tree Zigzag Level Order Traversal 104 Maximum Depth of Binary Tree 105 Construct Binary Tree from Preorder and Inorder Traversal 106 Construct Binary Tree from Inorder and Postorder Traversal 107 Binary Tree Level Order Traversal II 108 Convert Sorted Array To Binary Search Tree 109 Convert Sorted List to Binary Search Tree 110 Balanced Binary Tree 111 Minimum Depth of Binary Tree 112 Path Sum 113 Path Sum II 114 Flatten Binary Tree to Linked List 116 Populating Next Right Pointers in Each Node 117 Populating Next Right Pointers in Each Node II 118 Pascal's Triangle 119 Pascal's Triangle II 120 Triangle 121 Best Time to Buy and Sell Stocks 122 Best Time to Buy and Sell Stocks II 123 Binary Tree Maximum Path Sum 125 Valid Palindrome 127 Word Ladder 128 Longest Consecutive Sequence 129 Sum Root to Leaf Numbers 130 Surrounded Regions 131 Palindrome Partitioning 133 Clone Graph 134 Gas Station 135 Candy 136 Single Number 137 Single Number II 138 Copy List with Random Pointer 139 Word Break 141 Linked List Cycle 142 Linked List Cycle II 143 Reorder List 144 Binary Tree Preorder Traversal 145 Binary Tree Postorder Traversal 146 LRU Cache 147 Insertion Sort List 148 Sort List 150 Evaluate Reverse Polish Notation 151 Reverse Words in a String 152 Maximum Product Subarray 153 Find Minimum in Rotated Sorted Array 155 Min Stack 156 🔒 Binary Tree Upside Down 157 🔒 Read N Characters Given Read4 159 🔒 Longest Substring With At Most Two Distinct Characters 160 Intersection of Two Linked Lists 161 🔒 One Edit Distance 162 Find Peak Element 163 Missing Ranges 164 Maximum Gap 165 Compare Version Numbers 166 Fraction to Recurring Decimal 167 Two Sum II - Input Array is Sorted 168 Excel Sheet Column Title 169 Majority Element 170 🔒 Two Sum III - Data Structure Design 171 Excel Sheet Column Number 172 Factoring Trailing Zeroes 173 Binary Search Tree Iterator 179 Largest Number 187 Repeated DNA Sequences 189 Rotate Array 190 Reverse Bits 191 Number of One Bits 198 House Robber 199 Binary Tree Right Side View 200 Number of Islands 201 Bitwise AND of Numbers Range 202 Happy Number 203 Remove Linked List Elements 204 Count Primes 205 Isomorphic Strings 206 Reverse Linked List 207 Course Schedule 208 Implement Trie (Prefix Tree) 209 Minimum Size Subarray Sum 210 Course Schedule II 211 Design Add and Search Words Data Structure 213 House Robber II 215 Kth Largest Element in an Array 216 Combination Sum III 217 Contains Duplicate 218 The Skyline Problem 219 Contains Duplicate II 220 Contains Duplicate III 221 Maximal Square 222 Count Complete Tree Nodes 223 Rectangle Area 224 Basic Calculator 225 Implement Stack using Queues 226 Invert Binary Tree 227 Basic Calculator II 229 Majority Element II 230 Kth Smallest Element in a BST 231 Power of Two 232 Implement Queue Using Stacks 234 Palindrome Linked Lists 235 Lowest Common Ancestor of a Binary Search Tree 236 Lowest Common Ancestor of a Binary Tree 237 Delete a Node In A Linked List 238 Product of Array Except Self 240 Search a 2D Matrix II 241 Different Ways to Add Parentheses 242 Valid Anagram 243 🔒 Shortest Word Distance 244 🔒 Shortest Word Distance II 245 🔒 Shortest Word Distance III 246 🔒 Strobogrammatic Number 247 🔒 Strobogrammatic Number II 249 🔒 Group Shifted Strings 250 🔒 Count Univalue Subtrees 251 🔒 Flatten 2D Vector 252 🔒 Meeting Rooms 253 🔒 Meeting Rooms II 254 🔒 Factor Combinations 255 🔒 Verify Preorder Sequence In Binary Search Tree 256 🔒 Paint House 257 Binary Tree Paths 258 Add Digits 259 🔒 3Sum Smaller 260 Single Number III 261 🔒 Graph Valid Tree 263 Ugly Number 264 Ugly Number II 266 🔒 Palindrome Permutation 267 🔒 Palindrome Permutation II 268 Missing Number 269 Alien Dictionary 270 🔒 Closest Binary Search Tree Value 271 🔒 Encode and Decode Strings 274 H-Index 275 H-Index II 276 🔒 Paint Fence 277 🔒 Find The Celebrity 278 First Bad Version 279 Perfect Squares 280 🔒 Wiggle Sort 281 🔒 Zigzag Iterator 283 Move Zeroes 284 Peeking Iterator 285 🔒 Inorder Successor in BST 286 🔒 Walls and Gates 287 Find the Duplicate Number 288 🔒 Unique Word Abbreviation 289 Game of Life 290 Word Pattern 291 🔒 Word Pattern II 292 Nim Game 293 🔒 Flip Game 294 🔒 Flip Game II 298 🔒 Binary Tree Longest Consecutive Sequence 299 Bulls and Cows 300 Longest Increasing Subsequence 303 Range Sum Query - Immutable 304 Range Sum Query 2D - Immutable 306 Additive Number 307 Range Sum Query - Mutable 309 Best Time to Buy and Sell Stock with Cooldown 310 Minimum Height Trees 311 🔒 Sparse Matrix Multiplication 313 Super Ugly Number 314 🔒 Binary Tree Vertical Order Traversal 316 Remove Duplicate Letters 318 Maximum Product of Word Lengths 319 Bulb Switcher 320 🔒 Generalized Abbreviation 322 Coin Change 323 🔒 Number of Connected Components in Undirected Graph 324 Wiggle Sort II 325 🔒 Maximum Size Subarray Sum Equals K 326 Power of Three 328 Odd Even Linked List 331 Verify Preorder Serialization of a Binary Tree 331 🔒 Largest BST Subtree 332 Reconstruct Itinerary 334 Increasing Triplet Subsequence 337 House Robber III 338 Counting Bits 339 🔒 Nested List Weight Sum 340 🔒 Longest Substring with At Most K Distinct Characters 341 Flatten Nested List Iterator 342 Power of Four 343 Integer Break 344 Reverse A String 345 Reverse Vowels of A String 346 🔒 Moving Average From Data Stream 347 Top K frequent Elements 348 🔒 Design Tic-Tac-Toe 349 Intersection of 2 Arrays 350 Intersection of 2 Arrays II 351 🔒 Android Unlock Patterns 355 Design Twitter 357 Count Numbers with Unique Digits 359 🔒 Logger Rate Limiter 367 Valid Perfect Square 374 Guess Number Higher or Lower 380 Insert Delete GetRandom O(1) 383 Ransom Note 387 First Unique Character in String 389 Find the Difference 392 Is Subsequence 399 Evaluate Division 401 Binary Watch 404 Sum of Left Leaves 405 Convert a Number to Hexadecimal 408 🔒 Valid Word Abbreviation 409 Longest Palindrome 412 Fizz Buzz 414 Third Maximum Number 415 Add Strings 422 🔒 Valid Word Square 429 🔒 N-ary Tree Level Order Traversal 430 Flatten a Multilevel Doubly Linked List 433 Minimum Genetic Mutation 434 Number of Segments in a String 441 Arranging Coins 443 String Compression 447 Number of Boomerangs 448 Find All Numbers Disappeared in an Array 452 Minimum Number of Arrows to Burst Balloons 453 Minimum Moves to Equal Array Elements 455 Assign Cookies 459 Repeated Substring Pattern 461 Hamming Distance 463 Island Perimeter 475 Heaters 476 Number Complement 482 License Key Formatting 485 Max Consecutive Ones 492 Construct the Rectangle 495 Teemo Attacking 496 Next Greater Element I 499 The Maze III 500 Keyboard Row 501 Find Mode in Binary Search Tree 504 Base 7 505 The Maze II 506 Relative Ranks 507 Perfect Number 509 Fibonacci Number 520 Detect Capital 521 Longest Uncommon Subsequence I 530 Minimum Absolute Difference in BST 532 K - Diff Pairs in Array 538 Convert BST to Greater Tree 541 Reverse String II 543 Diameter of Binary Tree 547 Number of Provinces 551 Student Attendance Record I 557 Reverse Words in a String III 559 Maximum Depth of N-Ary Tree 561 Array Partition I 563 Binary Tree Tilt 566 Reshape The Matrix 572 Subtree of Another Tree 575 Distribute Candies 581 Shortest Unsorted Continuous Subarray 589 N-Ary Tree Preorder Traversal 590 N-Ary Tree Postorder Traversal 594 Longest Harmonious Subsequence 598 Range Addition II 599 Minimum Index Sum of 2 Lists 604 🔒 Design Compressed String Iterator 605 Can Place Flowers 606 Construct String from Binary Tree 617 Merge Two Binary Trees 624 🔒 Maximum Distance in Arrays 628 Maximum Product of Three Numbers 633 Sum Square Numbers 637 Average of Levels in Binary Tree 643 Maximum Average SubArray I 645 Set Mismatch 653 Two Sum IV - Input is a BST 657 Robot Return to Origin 658 Find K Closest Elements 661 Image Smoother 665 Non Deceasing Array 669 Trim a Binary Search Tree 671 Second Minimum Node in Binary Tree 674 Longest Continuous Increasing Subsequence 680 Valid Palindrome II 682 Baseball Game 684 Redundant Connection 686 Repeated String Match 687 Longest Univalue Path 688 Knight Probability in Chessboard 690 Employee Importance 693 Binary Number with Alternating Bits 696 Count Binary Substrings 697 Degree of an Array 700 Search in a Binary Search Tree 702 Search In A Sorted Array of Unknown Size 703 Kth Largest Element in a Stream 704 Binary Search 705 Design HashSet 706 Design HashMap 709 To Lower Case 716 🔒 Max Stack 717 1-bit and 2-bit Characters 718 Maximum Length of Repeated Subarray 720 Longest Word in Dictionary 724 Find Pivot Index 728 Self Dividing Numbers 733 Flood Fill 734 🔒 Sentence Similarity 743 Network Delay Time 734 Sentence Similarity 744 Find Smallest Letter Greater Than Target 746 Min Cost Climbing Stairs 747 Largest Number at least Twice of Others 748 Shortest Completing Word 758 Bold Words in String 760 🔒 Find Anagram Mappings 762 Prime Number of Set Bits in Primary Representation 766 Toeplitz Matrix 771 Jewels and Stones 783 Minimum Distance Between BST Nodes 787 Cheapest Flights Within K Stops 788 Rotated Digits 796 Rotate String 797 All Paths From Source to Target 800 🔒 Similar RGB Color 804 Unique Morse Code Words 806 Number of Lines to Write String 811 Subdomain Visit Count 812 Largest Triangle Area 819 Most Common Word 821 Shortest Distance to Character 824 Goat Latin 830 Positions of Large Groups 832 Flipping an Image 836 Rectangle Overlap 840 Magic Squares in Grid 844 Backspace String Compare 849 Maximize Distance to Closest Person 852 Peak Index in Mountain Array 859 Buddy Strings 860 Lemonade Change 867 Transpose Matrix 868 Binary Gap 872 Leaf-Similar Trees 874 Walking Robot Simulation 876 Middle of the Linked List 881 Boats to Save People 883 Projection Area of 3D Shapes 884 Uncommon Words from 2 Sentences 888 Fair Candy Swap 892 Surface Area of 3D Shapes 893 Groups of Special Equivalent Strings 896 Monotonic Array 897 Increasing Order Search Tree 905 Sort Array by Parity 908 Smallest Range I 909 Snakes and Ladders 914 X of a kind in a Deck of Cards 917 Reverse Only Letters 922 Sort Array by Parity II 925 Long Pressed Name 929 Unique Email Addresses 933 Number of Recent Calls 937 Reorder Data In Log Files 938 Range Sum of BST 941 Valid Mountain Array 942 DI String Match 944 Delete Columns to Make Sorted 949 Largest Time for Given Digits 952 Largest Component Size by Common Factor 953 Verifying an Alien Dictionary 961 N-Repeated Elements in Size 2N Array 965 Univalued Binary Tree 970 Powerful Integers 976 Largest Perimeter Triangle 977 Squares of a Sorted Array 983 Minimum Cost For Tickets 985 Sum of Even Numbers after Queries 989 Add to Array Form of Integer 993 Cousins in Binary Tree 994 Rotting Oranges 997 Find the Town Judge 999 Available Captures for Rook 1002 Find Common Characters 1005 Maximize Sum of Array After K Negations 1009 Complement of Base 10 Integer 1010 Pairs of Songs With Total Durations Divisible by 60 1013 Partition Array into Three Parts with equal Sum 1018 Binary Prefix Divisible by 5 1020 Number of Enclaves 1021 Remove Outermost Parenthesis 1022 Sum of Root to Leaf Binary Numbers 1025 Divisor Game 1029 Two City Scheduling 1030 Matrix Cells in Distance Order 1033 Moving Stones Until Consecutive 1037 Valid Boomerang 1042 Flower Planting with no Adjacent 1046 Last Stone Weight 1047 Remove All adjacent Duplicates in String 1051 Height Checker 1056 🔒 Confusing Number 1059 🔒 All Paths From Source Lead To Destination 1064 🔒 Fixed Point 1065 🔒 Index Pairs of a String 1071 Greatest Common Divisors of Strings 1078 Occurrence After Bigram 1085 🔒 Sum of Digits in Minimum Number 1086 🔒 High Five 1089 Duplicate Zeroes 1091 Shortest Path in Binary Matrix 1099 🔒 Two Sum Less Than K 1101 The Earliest Moment When Everyone Become Friend 1103 Distribute Candies to People 1108 Defanging an IP Address 1118 🔒 Number of Days in a Month 1119 🔒 Remove Vowels From String 1122 Relative Sort Array 1128 Number of Equivalent Domino Pairs 1133 🔒 Largest Unique Number 1134 🔒 Armstrong Number 1136 🔒 Parallel Courses 1137 Nth Tribonacci Number 1143 Longest Common Subsequence 1150 Check if Number is Majority Element in Sorted Array 1154 Day of The Year 1160 Find Words That Can Be Formed By Characters 1165 Single Row Keyboard 1168 Optimize Water Distribution in a Village 1170 Compare Strings By Frequency of the Smallest Character 1175 Prime Arrangements 1176 🔒 Diet Plan Performance 1180 🔒 Count Substrings with only one Distinct Letter 1184 Distance Between Bus Stops 1185 Day of the Week 1189 Maximum Number of Balloons 1196 🔒 How Many Apples Can You Put into the Basket 1200 Minimum Absolute Difference 1201 Ugly Number III 1202 Smallest String With Swaps 1207 Unique Number of Occurrences 1213 🔒 Intersection of Three Sorted Arrays 1217 Minimum Cost to Move Chips to The Same Position 1221 Split A String In Balanced Strings 1228 🔒 Missing A Number In Arithmetic Progression 1232 Check If It Is A Straight Line 1237 Find Positive Integer Solutions for a Given Equation 1243 🔒 Array Transformation 1249 Minimum Remove to Make Valid Parentheses 1252 Cells With Odd Values In Matrix 1254 Number of Closed Islands 1260 Shift 2D Grid 1266 Minimum Time Visiting All Points 1271 🔒 Hexspeak 1275 Find Winner On a Tic Tac Toe Game 1281 Subtract the Product and Sum of Digits of a Integer 1287 Element Appearing More Than 25% in Sorted Array 1290 Convert Binary Number In A Linked List to Integer 1295 Find Numbers With Even Numbers of Digits 1299 Replace Elements With Greatest Element on Right Side 1304 Find N Unique Integers Sum Up To Zero 1309 Decrypt String From Alphabet To Integer Mapping 1313 Decompress Run-Length Encoded Strings 1317 Convert Integer to Sum Of Two Non-Zero Integers 1319 Number of Operations to Make Network Connected 1323 Maximum 69 Number 1331 Rank Transform of An Array 1332 Remove Palindromic Subsequences 1337 The K Weakest Rows In A Matrix 1342 Number of Steps to Reduce a Number to Zero 1346 Check if N and It's Double Exist 1351 Count Negative Numbers In A Sorted Matrix 1356 Sort Integers by Number of 1 Bits 1360 Number of Days Between Two Dates 1365 How Many Numbers Are Smaller Than Current Number 1370 Increasing Decreasing String 1374 Generate A String With Characters That Have Odd Count 1376 Time Needed to Inform All Employees 1379 Find a Corresponding Node of a Binary Tree in a Clone of That Tree 1380 Lucky Numbers In A Matrix 1385 Find The Distance Value Between 2 Arrays 1389 Create Target Array in Given Order 1394 Find Lucky Integer In An Array 1399 Count Largest Group 1402 Reducing Dishes 1403 Minimum Subsequence in Non-Increasing Order 1408 String Matching In An Array 1413 Minimum Value To Get Positive Step By Step Sum 1417 Reformat The String 1422 Maximum Score After Splitting A String 1426 🔒 Counting Elements 1427 🔒 Performing String Shifts 1431 Kids With The Greatest Number Of Candies 1436 Destination City 1437 Check If All 1's Are at Least Length K Places Away 1441 Build An Array With Stack Operation 1444 Number of Ways of Cutting a Pizza 1446 Consecutive Characters 1450 Number of Students Doing Homework at Given Time 1455 Check If Word Occurs as Prefix of any Word in Sentence 1460 Make 2 Arrays Equal by Reversing Sub Arrays 1464 Maximum Product of 2 Elements in Array 1466 Reorder Routes to Make All Paths Lead to the City Zero 1469 🔒 Find All Lonely Nodes 1470 Shuffle The Array 1472 Design Browser History 1474 🔒 Delete N Nodes After M Nodes In A Linked List 1475 Final Prices With Special Discount in a Shop 1480 Running Sum of 1D Array 1486 XOR Operations in An Array 1491 Average Salary Excluding the Minimum and Maximum Salary 1496 Path Crossing 1502 Can Make Arithmetic Progression From Sequence 1507 Reformat Date 1512 Number of Good Pairs 1514 Path with Maximum Probability 1518 Water Bottles 1523 Count Odd Numbers In Interval Range 1528 Shuffle Strings 1534 Count Good Triplets 1539 Kth Missing Positive Number 1544 Make The String Great 1550 Three Consecutive Odds 1556 Thousand Separator 1560 Most Visited Sector in a Circular Track 1566 Detect Pattern of Length M Repeated K or More Times 1572 Matrix Diagonal Sum 1576 Replace All ?'s to Avoid Consecutive Repeating Characters 1582 Special Positions in a Binary Matrix 1584 Min Cost to Connect All Points 1588 Sum of All Odd Length Subarrays 1592 Rearrange Spaces Between Words 1598 Crawler Log Folder 1600 Throne Inheritance 1603 Design Parking System 1608 Special Array With X Elements Greater Than or Equal X 1614 Maximum Nesting Depth of the Parentheses 1619 Mean of Array After Removing Some Elements 1624 Largest Substring Between Two Equal Characters 1629 Slowest Key 1631 Path With Minimum Effort 1636 Sort Array by Increasing Frequency 1637 Widest Vertical Area Between Two Points Containing No Points 1640 Check Array Formation Through Concatenation 1646 Get Maximum in Generated Array 1652 Defuse the Bomb 1656 Design an Ordered Stream 1662 Check If Two String Arrays are Equivalent 1668 Maximum Repeating Substring 1672 Richest Customer Wealth 1678 Goal Parser Interpretation 1684 Count the Number of Consistent Strings 1688 Count of Matches in Tournament 1694 Reformat Phone Number 1700 Number of Students Unable to Eat Lunch 1704 Determine if String Halves Are Alike 1708 🔒 Largest Subarray Length K 1710 Maximum Units on a Truck 1716 Calculate Money in Leetcode Bank 1720 Decode XORed Array 1725 Number Of Rectangles That Can Form The Largest Square 1732 Find the Highest Altitude 1736 Latest Time by Replacing Hidden Digits 1742 Maximum Number of Balls in a Box 1748 Sum of Unique Elements 1752 Check if Array Is Sorted and Rotated 1758 Minimum Changes To Make Alternating Binary String 1763 Longest Nice Substring 1768 Merge Strings Alternately 1773 Count Items Matching a Rule 1779 Find Nearest Point That Has the Same X or Y Coordinate 1784 Check if Binary String Has at Most One Segment of Ones 1790 Check if One String Swap Can Make Strings Equal 1791 Find Center of Star Graph 1796 Second Largest Digit in a String 1800 Maximum Ascending Subarray Sum 1805 Number of Different Integers in a String 1812 Determine Color of a Chessboard Square 1816 Truncate Sentence 1822 Sign of the Product of an Array 1826 🔒 Faulty Sensor 1827 Minimum Operations to Make the Array Increasing 1832 Check if the Sentence Is Pangram 1837 Sum of Digits in Base K 1844 Replace All Digits with Characters 1848 Minimum Distance to the Target Element 1854 Maximum Population Year 1859 Sorting the Sentence 1863 Sum of All Subset XOR Totals 1869 Longer Contiguous Segments of Ones than Zeros 1876 Substrings of Size Three with Distinct Characters 1880 Check if Word Equals Summation of Two Words 1886 Determine Whether Matrix Can Be Obtained By Rotation 1893 Check if All the Integers in a Range Are Covered 1897 Redistribute Characters to Make All Strings Equal 1903 Largest Odd Number in String 1909 Remove One Element to Make the Array Strictly Increasing 1913 Maximum Product Difference Between Two Pairs 1920 Build Array from Permutation 1925 Count Square Sum Triples 1929 Concatenation of Array 1933 🔒 Check If String Is Decomposable Into Value EqualSubstrings 1935 Maximum Number of Words You Can Type 1941 Check if All Characters Have Equal Number of Occurrences 1945 Sum of Digits of String After Convert 1952 Three Divisors 1957 Delete Characters to Make Fancy String 1961 Check If String Is a Prefix of Array 1967 Number of Strings That Appear as Substrings in Word 1971 Find if Path Exists in Graph 1974 Minimum Time to Type Word Using Special Typewriter 1979 Find Greatest Common Divisor of Array 1984 Minimum Difference Between Highest and Lowest of K Scores 1991 Find the Middle Index in Array 1995 Count Special Quadruplets 2000 Reverse Prefix of Word 2006 Count Number of Pairs With Absolute Difference K 2011 Final Value of Variable After Performing Operations 2016 Maximum Difference Between Increasing Elements 2022 Convert 1D Array Into 2D Array 2027 Minimum Moves to Convert String 2032 Two Out of Three 2037 Minimum Number of Moves to Seat Everyone 2042 Check if Numbers Are Ascending in a Sentence 2047 Number of Valid Words in a Sentence 2053 Kth Distinct String in an Array 2057 Smallest Index With Equal Value 2062 Count Vowel Substrings of a String 2068 Check Whether Two Strings are Almost Equivalent 2073 Time Needed to Buy Tickets 2078 Two Furthest Houses With Different Colors 2085 Count Common Words With One Occurrence 2089 Find Target Indices After Sorting Array 2093 Minimum Cost To Reach City With Discounts 2094 Finding 3-Digit Even Numbers 2099 Find Subsequence of Length K With the Largest Sum 2103 Rings and Rods 2108 Find First Palindromic String in the Array 2114 Maximum Number of Words Found in Sentences 2119 A Number After a Double Reversal 2124 Check if All A's Appears Before All B's 2129 Capitalize the Title 2133 Check if Every Row and Column Contains All Numbers 2138 Divide a String Into Groups of Size k 2144 Minimum Cost of Buying Candies With Discount 2148 Count Elements With Strictly Smaller and Greater Elements 2154 Keep Multiplying Found Values by Two 2160 Minimum Sum of Four Digit Number After Splitting Digits 2164 Sort Even and Odd Indices Independently 2169 Count Operations to Obtain Zero 2176 Count Equal and Divisible Pairs in an Array 2180 Count Integers With Even Digit Sum 2185 Counting Words With a Given Prefix 2190 Most Frequent Number Following Key In an Array 2194 Cells in a Range on an Excel Sheet 2200 Find All K-Distant Indices in an Array 2206 Divide Array Into Equal Pairs 2210 Count Hills and Valleys in an Array 2215 Find the Difference of Two Arrays 2220 Minimum Bit Flips to Convert Number 2224 Minimum Number of Operations to Convert Time 2229 🔒 Check if an array is consecutive 2231 Largest Number After Digit Swaps by Parity 2235 Add Two Integers 2236 Root Equals Sum of Children 2239 Find Closest Number to Zero 2243 Calculate Digit Sum of a String 2248 Intersection of Multiple Arrays 2255 Count Prefixes of a Given String 2259 Remove Digit From Number to Maximize Result 2264 Largest 3-Same-Digit Number in String 2269 Find the K-Beauty of a Number 2273 Find Resultant Array After Removing Anagrams 2278 Percentage of Letter in String 2283 Check if Number Has Equal Digit Count and Digit Value 2287 Rearrange Characters to Make Target String 2293 Min Max Game 2299 Strong Password Checker II 2300 Successful Pairs of Spells and Potions 2303 Calculate Amount Paid in Taxes 2309 Greatest English Letter in Upper and Lower Case 2315 Count Asterisks 2316 Count Unreachable Pairs of Nodes in an Undirected Graph 2319 Check if Matrix Is X-Matrix 2325 Decode the Message 2331 Evaluate Boolean Binary Tree 2335 Minimum Amount of Time to Fill Cups 2439 Minimize Maximum of Array 2341 Maximum Number of Pairs in Array 2347 Best Poker Hand 2348 Number of Zero-Filled Subarrays 2351 First Letter to Appear Twice 2357 Make Array Zero by Subtracting Equal Amounts 2360 Longest Cycle in a Graph 2363 Merge Similar Items 2367 Number of Arithmetic Triplets 2373 Largest Local Values in a Matrix 2379 Minimum Recolors to Get K Consecutive Black Blocks 2383 Minimum Hours of Training to Win a Competition 2389 Longest Subsequence With Limited Sum 2395 Find Subarrays With Equal Sum 2399 Check Distances Between Same Letters 2404 Most Frequent Even Element 2409 Count Days Spent Together 2413 Smallest Even Multiple 2418 Sort the People 2423 Remove Letter To Equalize Frequency 2427 Number of Common Factors 2432 The Employee That Worked on the Longest Task 2437 Number of Valid Clock Times 2441 Largest Positive Integer That Exists With Its Negative 2446 Determine if Two Events Have Conflict 2451 Odd String Difference 2455 Average Value of Even Numbers That Are Divisible by Three 2460 Apply Operations to an Array 2465 Number of Distinct Averages 2466 Count Ways To Build Good Strings 2469 Convert the Temperature 2475 Number of Unequal Triplets in Array 2481 Minimum Cuts to Divide a Circle 2485 Find the Pivot Integer 2490 Circular Sentence 2492 Minimum Score of a Path Between Two Cities 2496 Maximum Value of a String in an Array 2500 Delete Greatest Value in Each Row 2506 Count Pairs Of Similar Strings 2511 Maximum Enemy Forts That Can Be Captured 2515 Shortest Distance to Target String in a Circular Array 2520 Count the Digits That Divide a Number 2525 Categorize Box According to Criteria 2529 Maximum Count of Positive Integer and Negative Integer 2535 Difference Between Element Sum and Digit Sum of an Array 2540 Minimum Common Value 2544 Alternating Digit Sum 2549 Count Distinct Numbers on Board 2553 Separate the Digits in an Array 2558 Take Gifts From the Richest Pile 2562 Find the Array Concatenation Value 2566 Maximum Difference by Remapping a Digit 2570 Merge Two 2D Arrays by Summing Values 2574 Left and Right Sum Differences 2578 Split With Minimum Sum 2582 Pass the Pillow 2586 Count the Number of Vowel Strings in Range 2591 Distribute Money to Maximum Children 2595 Number of Even and Odd Bits 2600 K Items With the Maximum Sum 2605 Form Smallest Number From Two Digit Arrays 2609 Find the Longest Balanced Substring of a Binary String 2614 Prime In Diagonal 2639 Find the Width of Columns of a Grid 2643 Row With Maximum Ones 2644 Find the Maximum Divisibility Score 2651 Calculate Delayed Arrival Time 2652 Sum Multiples 2656 Maximum Sum With Exactly K Elements 2660 Determine the Winner of a Bowling Game 2670 Find the Distinct Difference Array 2678 Number of Senior Citizens 2682 Find the Losers of the Circular Game 2689 🔒 Extract Kth Character From The Rope Tree 2696 Minimum String Length After Removing Substrings 2697 Lexicographically Smallest Palindrome 2706 Buy Two Chocolates 2710 Remove Trailing Zeros From a String 2716 Minimize String Length 2717 Semi-Ordered Permutation 2728 🔒 Count Houses in a Circular Street 2729 Check if The Number is Fascinating 2733 Neither Minimum nor Maximum 2739 Total Distance Traveled 2744 Find Maximum Number of String Pairs 2748 Number of Beautiful Pairs 2760 Longest Even Odd Subarray With Threshold 2765 Longest Alternating Subarray 2769 Find the Maximum Achievable Number 2778 Sum of Squares of Special Elements 2784 Check if Array is Good 2788 Split Strings by Separator 2798 Number of Employees Who Met the Target 2806 Account Balance After Rounded Purchase 2810 Faulty Keyboard 2815 Max Pair Sum in an Array 2824 Count Pairs Whose Sum is Less than Target 2828 Check if a String Is an Acronym of Words 2833 Furthest Point From Origin 2839 Check if Strings Can be Made Equal With Operations I 2843 Count Symmetric Integers 2848 Points That Intersect With Cars 2855 Minimum Right Shifts to Sort the Array 2859 Sum of Values at Indices With K Set Bits 2864 Maximum Odd Binary Number 2869 Minimum Operations to Collect Elements 2873 Maximum Value of an Ordered Triplet I 2894 Divisible and Non-divisible Sums Difference 2899 Last Visited Integers 2900 Longest Unequal Adjacent Groups Subsequence I 2903 Find Indices With Index and Value Difference I 2908 Minimum Sum of Mountain Triplets I 2913 Subarrays Distinct Element Sum of Squares I 2917 Find the K-or of an Array 2923 Find Champion I 2928 Distribute Candies Among Children I 2932 Maximum Strong Pair XOR I 2937 Make Three Strings Equal 2942 Find Words Containing Character 2946 Matrix Similarity After Cyclic Shifts 2951 Find the Peaks 2956 Find Common Elements Between Two Arrays 2960 Count Tested Devices After Test Operations 2965 Find Missing and Repeated Values 2970 Count the Number of Irremovable Subarrays I 2974 Minimum Number Game 2980 Check if Bitwise OR Has Trailing Zeros 2996 Smallest Missing Integer Greater Than Sequential Prefix Sum 3000 Maximum Area of Longest Diagonal Rectangle 3005 Count Elements With Maximum Frequency 3010 Divide an Array Into Subarrays With Minimum Cost I 3014 Minimum Number of Pushes to Type Word I 3019 Number of Changing Keys 3024 Type of Triangle 3028 Ant on the Boundary 3032 🔒 Count Numbers With Unique Digits II 3033 Modify the Matrix 3038 Maximum Number of Operations With the Same Score I 3042 Count Prefix and Suffix Pairs I 3046 Split the Array 3062 🔒 Winner of the Linked List Game 3063 🔒 Linked List Frequency 3065 Minimum Operations to Exceed Threshold Value I 3069 Distribute Elements Into Two Arrays I 3074 Apple Redistribution into Boxes 3079 Find the Sum of Encrypted Integers 3083 Existence of a Substring in a String and Its Reverse 3090 Maximum Length Substring With Two Occurrences 3095 Shortest Subarray With OR at Least K I 3099 Harshad Number 3105 Longest Strictly Increasing or Strictly Decreasing Subarray 3110 Score of a String 3114 Latest Time You Can Obtain After Replacing Characters 3120 Count the Number of Special Characters I 3127 Make a Square with the Same Color 3131 Find the Integer Added to Array I 3136 Valid Word 3142 Check if Grid Satisfies Conditions 3146 Permutation Difference between Two Strings 3151 Special Array I 3158 Find the XOR of Numbers Which Appear Twice 3162 Find the Number of Good Pairs I 3168 Minimum Number of Chairs in a Waiting Room 3173 🔒 Bitwise OR of Adjacent Elements 3174 Clear Digits 3178 Find the Child Who Has the Ball After K Seconds 3184 Count Pairs That Form a Complete Day I 3190 Find Minimum Operations to Make All Elements Divisible by Three 3194 Minimum Average of Smallest and Largest Elements 3199 🔒 Count Triplets With Even XOR Set Bits I
