README.md

LeetCode

LeetCode Problems' Solutions [力扣 ∙ 话题分类]

[1-50]	[51-100]	[101-150]	[151-200]	[201-250]	[251-300]
[301-350]	[351-400]	[401-450]	[451-500]	[501-550]	[551-600]
[601-650]	[651-700]	[701-750]	[751-800]	[801-850]	[851-900]
[901-950]	[951-1000]	[1001-1050]	[1051-1100]	[1101-1150]	[1151-1200]
[1201-1250]	[1251-1300]	[1301-1350]	[1351-1400]	[1401-1450]	[1451-1500]

#	Title	Solution	Difficulty
1240	Tiling a Rectangle with the Fewest Squares	Go	Hard
1239	Maximum Length of a Concatenated String with Unique Characters	Go	Medium
1238	Circular Permutation in Binary Representation	Go	Medium
1237	Find Positive Integer Solution for a Given Equation	Go	Easy
1236	Web Crawler 🔒	Go	Medium
1235	Maximum Profit in Job Scheduling	Go	Hard
1234	Replace the Substring for Balanced String	Go	Medium
1233	Remove Sub-Folders from the Filesystem	Go	Medium
1232	Check If It Is a Straight Line	Go	Easy
1231	Divide Chocolate 🔒	Go	Hard
1230	Toss Strange Coins 🔒	Go	Medium
1229	Meeting Scheduler 🔒	Go	Medium
1228	Missing Number In Arithmetic Progression 🔒	Go	Easy
1227	Airplane Seat Assignment Probability	Go	Medium
1226	The Dining Philosophers	Go	Medium
1225	Report Contiguous Dates 🔒	MySQL	Hard
1224	Maximum Equal Frequency	Go	Hard
1223	Dice Roll Simulation	Go	Medium
1222	Queens That Can Attack the King	Go	Medium
1221	Split a String in Balanced Strings	Go	Easy
1220	Count Vowels Permutation	Go	Hard
1219	Path with Maximum Gold	Go	Medium
1218	Longest Arithmetic Subsequence of Given Difference	Go	Medium
1217	Play with Chips	Go	Easy
1216	Valid Palindrome III 🔒	Go	Hard
1215	Stepping Numbers 🔒	Go	Medium
1214	Two Sum BSTs 🔒	Go	Medium
1213	Intersection of Three Sorted Arrays 🔒	Go	Easy
1212	Team Scores in Football Tournament 🔒	MySQL	Medium
1211	Queries Quality and Percentage 🔒	MySQL	Easy
1210	Minimum Moves to Reach Target with Rotations	Go	Hard
1209	Remove All Adjacent Duplicates in String II	Go	Medium
1208	Get Equal Substrings Within Budget	Go	Medium
1207	Unique Number of Occurrences	Go	Easy
1206	Design Skiplist	Go	Hard
1205	Monthly Transactions II 🔒	MySQL	Medium
1204	Last Person to Fit in the Elevator 🔒	MySQL	Medium
1203	Sort Items by Groups Respecting Dependencies	Go	Hard
1202	Smallest String With Swaps	Go	Medium
1201	Ugly Number III	Go	Medium
1200	Minimum Absolute Difference	Go	Easy
1199	Minimum Time to Build Blocks 🔒	Go	Hard
1198	Find Smallest Common Element in All Rows 🔒	Go	Medium
1197	Minimum Knight Moves 🔒	Go	Medium
1196	How Many Apples Can You Put into the Basket 🔒	Go	Easy
1195	Fizz Buzz Multithreaded	Go	Medium
1194	Tournament Winners 🔒	MySQL	Hard
1193	Monthly Transactions I 🔒	MySQL	Medium
1192	Critical Connections in a Network	Go	Hard
1191	K-Concatenation Maximum Sum	Go	Medium
1190	Reverse Substrings Between Each Pair of Parentheses	Go	Medium
1189	Maximum Number of Balloons	Go	Easy
1188	Design Bounded Blocking Queue 🔒	Go	Medium
1187	Make Array Strictly Increasing	Go	Hard
1186	Maximum Subarray Sum with One Deletion	Go	Medium
1185	Day of the Week	Go	Easy
1184	Distance Between Bus Stops	Go	Easy
1183	Maximum Number of Ones 🔒	Go	Hard
1182	Shortest Distance to Target Color 🔒	Go	Medium
1181	Before and After Puzzle 🔒	Go	Medium
1180	Count Substrings with Only One Distinct Letter 🔒	Go	Easy
1179	Reformat Department Table	MySQL	Easy
1178	Number of Valid Words for Each Puzzle	Go	Hard
1177	Can Make Palindrome from Substring	Go	Medium
1176	Diet Plan Performance 🔒	Go	Easy
1175	Prime Arrangements	Go	Easy
1174	Immediate Food Delivery II 🔒	MySQL	Medium
1173	Immediate Food Delivery I 🔒	MySQL	Easy
1172	Dinner Plate Stacks	Go	Hard
1171	Remove Zero Sum Consecutive Nodes from Linked List	Go	Medium
1170	Compare Strings by Frequency of the Smallest Character	Go	Easy
1169	Invalid Transactions	Go	Medium
1168	Optimize Water Distribution in a Village 🔒	Go	Hard
1167	Minimum Cost to Connect Sticks 🔒	Go	Medium
1166	Design File System 🔒	Go	Medium
1165	Single-Row Keyboard 🔒	Go	Easy
1164	Product Price at a Given Date 🔒	MySQL	Medium
1163	Last Substring in Lexicographical Order	Go	Hard
1162	As Far from Land as Possible	Go	Medium
1161	Maximum Level Sum of a Binary Tree	Go	Medium
1160	Find Words That Can Be Formed by Characters	Go	Easy
1159	Market Analysis II 🔒	MySQL	Hard
1158	Market Analysis I 🔒	MySQL	Medium
1157	Online Majority Element In Subarray	Go	Hard
1156	Swap For Longest Repeated Character Substring	Go	Medium
1155	Number of Dice Rolls With Target Sum	Go	Medium
1154	Day of the Year	Go	Easy
1153	String Transforms Into Another String 🔒	Go	Hard
1152	Analyze User Website Visit Pattern 🔒	Go	Medium
1151	Minimum Swaps to Group All 1's Together 🔒	Go	Medium
1150	Check If a Number Is Majority Element in a Sorted Array 🔒	Go	Easy
1149	Article Views II 🔒	MySQL	Medium
1148	Article Views I 🔒	MySQL	Easy
1147	Longest Chunked Palindrome Decomposition	Go	Hard
1146	Snapshot Array	Go	Medium
1145	Binary Tree Coloring Game	Go	Medium
1144	Decrease Elements To Make Array Zigzag	Go	Medium
1143	Longest Common Subsequence	Go	Medium
1142	User Activity for the Past 30 Days II 🔒	MySQL	Easy
1141	User Activity for the Past 30 Days I 🔒	MySQL	Easy
1140	Stone Game II	Go	Medium
1139	Largest 1-Bordered Square	Go	Medium
1138	Alphabet Board Path	Go	Medium
1137	N-th Tribonacci Number	Go	Easy
1136	Parallel Courses 🔒	Go	Hard
1135	Connecting Cities With Minimum Cost 🔒	Go	Medium
1134	Armstrong Number 🔒	Go	Easy
1133	Largest Unique Number 🔒	Go	Easy
1132	Reported Posts II 🔒	MySQL	Medium
1131	Maximum of Absolute Value Expression	Go	Medium
1130	Minimum Cost Tree From Leaf Values	Go	Medium
1129	Shortest Path with Alternating Colors	Go	Medium
1128	Number of Equivalent Domino Pairs	Go	Easy
1127	User Purchase Platform 🔒	MySQL	Hard
1126	Active Businesses 🔒	MySQL	Medium
1125	Smallest Sufficient Team	Go	Hard
1124	Longest Well-Performing Interval	Go	Medium
1123	Lowest Common Ancestor of Deepest Leaves	Go	Medium
1122	Relative Sort Array	Go	Easy
1121	Divide Array Into Increasing Sequences 🔒	Go	Hard
1120	Maximum Average Subtree 🔒	Go	Medium
1119	Remove Vowels from a String 🔒	Go	Easy
1118	Number of Days in a Month 🔒	Go	Easy
1117	Building H2O	Go	Medium
1116	Print Zero Even Odd	Go	Medium
1115	Print FooBar Alternately	Go	Medium
1114	Print in Order	Go	Easy
1113	Reported Posts 🔒	MySQL	Easy
1112	Highest Grade For Each Student 🔒	MySQL	Medium
1111	Maximum Nesting Depth of Two Valid Parentheses Strings	Go	Medium
1110	Delete Nodes And Return Forest	Go	Medium
1109	Corporate Flight Bookings	Go	Medium
1108	Defanging an IP Address	Go	Easy
1107	New Users Daily Count 🔒	MySQL	Medium
1106	Parsing A Boolean Expression	Go	Hard
1105	Filling Bookcase Shelves	Go	Medium
1104	Path In Zigzag Labelled Binary Tree	Go	Medium
1103	Distribute Candies to People	Go	Easy
1102	Path With Maximum Minimum Value 🔒	Go	Medium
1101	The Earliest Moment When Everyone Become Friends 🔒	Go	Medium
1100	Find K-Length Substrings With No Repeated Characters 🔒	Go	Medium
1099	Two Sum Less Than K 🔒	Go	Easy
1098	Unpopular Books 🔒	MySQL	Medium
1097	Game Play Analysis V 🔒	MySQL	Hard
1096	Brace Expansion II	Go	Hard
1095	Find in Mountain Array	Go	Hard
1094	Car Pooling	Go	Medium
1093	Statistics from a Large Sample	Go	Medium
1092	Shortest Common Supersequence	Go	Hard
1091	Shortest Path in Binary Matrix	Go	Medium
1090	Largest Values From Labels	Go	Medium
1089	Duplicate Zeros	Go	Easy
1088	Confusing Number II 🔒	Go	Hard
1087	Brace Expansion 🔒	Go	Medium
1086	High Five 🔒	Go	Easy
1085	Sum of Digits in the Minimum Number 🔒	Go	Easy
1084	Sales Analysis III 🔒	MySQL	Easy
1083	Sales Analysis II 🔒	MySQL	Easy
1082	Sales Analysis I 🔒	MySQL	Easy
1081	Smallest Subsequence of Distinct Characters	Go	Medium
1080	Insufficient Nodes in Root to Leaf Paths	Go	Medium
1079	Letter Tile Possibilities	Go	Medium
1078	Occurrences After Bigram	Go	Easy
1077	Project Employees III 🔒	MySQL	Medium
1076	Project Employees II 🔒	MySQL	Easy
1075	Project Employees I 🔒	MySQL	Easy
1074	Number of Submatrices That Sum to Target	Go	Hard
1073	Adding Two Negabinary Numbers	Go	Medium
1072	Flip Columns For Maximum Number of Equal Rows	Go	Medium
1071	Greatest Common Divisor of Strings	Go	Easy
1070	Product Sales Analysis III 🔒	MySQL	Medium
1069	Product Sales Analysis II 🔒	MySQL	Easy
1068	Product Sales Analysis I 🔒	MySQL	Easy
1067	Digit Count in Range 🔒	Go	Hard
1066	Campus Bikes II 🔒	Go	Medium
1065	Index Pairs of a String 🔒	Go	Easy
1064	Fixed Point 🔒	Go	Easy
1063	Number of Valid Subarrays 🔒	Go	Hard
1062	Longest Repeating Substring 🔒	Go	Medium
1061	Lexicographically Smallest Equivalent String 🔒	Go	Medium
1060	Missing Element in Sorted Array 🔒	Go	Medium
1059	All Paths from Source Lead to Destination 🔒	Go	Medium
1058	Minimize Rounding Error to Meet Target 🔒	Go	Medium
1057	Campus Bikes 🔒	Go	Medium
1056	Confusing Number 🔒	Go	Easy
1055	Shortest Way to Form String 🔒	Go	Medium
1054	Distant Barcodes	Go	Medium
1053	Previous Permutation With One Swap	Go	Medium
1052	Grumpy Bookstore Owner	Go	Medium
1051	Height Checker	Go	Easy
1050	Actors and Directors Who Cooperated At Least Three Times 🔒	MySQL	Easy
1049	Last Stone Weight II	Go	Medium
1048	Longest String Chain	Go	Medium
1047	Remove All Adjacent Duplicates In String	Go	Easy
1046	Last Stone Weight	Go	Easy
1045	Customers Who Bought All Products 🔒	MySQL	Medium
1044	Longest Duplicate Substring	Go	Hard
1043	Partition Array for Maximum Sum	Go	Medium
1042	Flower Planting With No Adjacent	Go	Easy
1041	Robot Bounded In Circle	Go	Medium
1040	Moving Stones Until Consecutive II	Go	Medium
1039	Minimum Score Triangulation of Polygon	Go	Medium
1038	Binary Search Tree to Greater Sum Tree	Go	Medium
1037	Valid Boomerang	Go	Easy
1036	Escape a Large Maze	Go	Hard
1035	Uncrossed Lines	Go	Medium
1034	Coloring A Border	Go	Medium
1033	Moving Stones Until Consecutive	Go	Easy
1032	Stream of Characters	Go	Hard
1031	Maximum Sum of Two Non-Overlapping Subarrays	Go	Medium
1030	Matrix Cells in Distance Order	Go	Easy
1029	Two City Scheduling	Go	Easy
1028	Recover a Tree From Preorder Traversal	Go	Hard
1027	Longest Arithmetic Sequence	Go	Medium
1026	Maximum Difference Between Node and Ancestor	Go	Medium
1025	Divisor Game	Go	Easy
1024	Video Stitching	Go	Medium
1023	Camelcase Matching	Go	Medium
1022	Sum of Root To Leaf Binary Numbers	Go	Easy
1021	Remove Outermost Parentheses	Go	Easy
1020	Number of Enclaves	Go	Medium
1019	Next Greater Node In Linked List	Go	Medium
1018	Binary Prefix Divisible By 5	Go	Easy
1017	Convert to Base -2	Go	Medium
1016	Binary String With Substrings Representing 1 To N	Go	Medium
1015	Smallest Integer Divisible by K	Go	Medium
1014	Best Sightseeing Pair	Go	Medium
1013	Partition Array Into Three Parts With Equal Sum	Go	Easy
1012	Numbers With Repeated Digits	Go	Hard
1011	Capacity To Ship Packages Within D Days	Go	Medium
1010	Pairs of Songs With Total Durations Divisible by 60	Go	Easy
1009	Complement of Base 10 Integer	Go	Easy
1008	Construct Binary Search Tree from Preorder Traversal	Go	Medium
1007	Minimum Domino Rotations For Equal Row	Go	Medium
1006	Clumsy Factorial	Go	Medium
1005	Maximize Sum Of Array After K Negations	Go	Easy
1004	Max Consecutive Ones III	Go	Medium
1003	Check If Word Is Valid After Substitutions	Go	Medium
1002	Find Common Characters	Go	Easy
1001	Grid Illumination	Go	Hard
1000	Minimum Cost to Merge Stones	Go	Hard
999	Available Captures for Rook	Go	Easy
998	Maximum Binary Tree II	Go	Medium
997	Find the Town Judge	Go	Easy
996	Number of Squareful Arrays	Go	Hard
995	Minimum Number of K Consecutive Bit Flips	Go	Hard
994	Rotting Oranges	Go	Easy
993	Cousins in Binary Tree	Go	Easy
992	Subarrays with K Different Integers	Go	Hard
991	Broken Calculator	Go	Medium
990	Satisfiability of Equality Equations	Go	Medium
989	Add to Array-Form of Integer	Go	Easy
988	Smallest String Starting From Leaf	Go	Medium
987	Vertical Order Traversal of a Binary Tree	Go	Medium
986	Interval List Intersections	Go	Medium
985	Sum of Even Numbers After Queries	Go	Easy
984	String Without AAA or BBB	Go	Medium
983	Minimum Cost For Tickets	Go	Medium
982	Triples with Bitwise AND Equal To Zero	Go	Hard
981	Time Based Key-Value Store	Go	Medium
980	Unique Paths III	Go	Hard
979	Distribute Coins in Binary Tree	Go	Medium
978	Longest Turbulent Subarray	Go	Medium
977	Squares of a Sorted Array	Go	Easy
976	Largest Perimeter Triangle	Go	Easy
975	Odd Even Jump	Go	Hard
974	Subarray Sums Divisible by K	Go	Medium
973	K Closest Points to Origin	Go	Medium
972	Equal Rational Numbers	Go	Hard
971	Flip Binary Tree To Match Preorder Traversal	Go	Medium
970	Powerful Integers	Go	Easy
969	Pancake Sorting	Go	Medium
968	Binary Tree Cameras	Go	Hard
967	Numbers With Same Consecutive Differences	Go	Medium
966	Vowel Spellchecker	Go	Medium
965	Univalued Binary Tree	Go	Easy
964	Least Operators to Express Number	Go	Hard
963	Minimum Area Rectangle II	Go	Medium
962	Maximum Width Ramp	Go	Medium
961	N-Repeated Element in Size 2N Array	Go	Easy
960	Delete Columns to Make Sorted III	Go	Hard
959	Regions Cut By Slashes	Go	Medium
958	Check Completeness of a Binary Tree	Go	Medium
957	Prison Cells After N Days	Go	Medium
956	Tallest Billboard	Go	Hard
955	Delete Columns to Make Sorted II	Go	Medium
954	Array of Doubled Pairs	Go	Medium
953	Verifying an Alien Dictionary	Go	Easy
952	Largest Component Size by Common Factor	Go	Hard
951	Flip Equivalent Binary Trees	Go	Medium
950	Reveal Cards In Increasing Order	Go	Medium
949	Largest Time for Given Digits	Go	Easy
948	Bag of Tokens	Go	Medium
947	Most Stones Removed with Same Row or Column	Go	Medium
946	Validate Stack Sequences	Go	Medium
945	Minimum Increment to Make Array Unique	Go	Medium
944	Delete Columns to Make Sorted	Go	Easy
943	Find the Shortest Superstring	Go	Hard
942	DI String Match	Go	Easy
941	Valid Mountain Array	Go	Easy
940	Distinct Subsequences II	Go	Hard
939	Minimum Area Rectangle	Go	Medium
938	Range Sum of BST	Go	Easy
937	Reorder Data in Log Files	Go	Easy
936	Stamping The Sequence	Go	Hard
935	Knight Dialer	Go	Medium
934	Shortest Bridge	Go	Medium
933	Number of Recent Calls	Go	Easy
932	Beautiful Array	Go	Medium
931	Minimum Falling Path Sum	Go	Medium
930	Binary Subarrays With Sum	Go	Medium
929	Unique Email Addresses	Go	Easy
928	Minimize Malware Spread II	Go	Hard
927	Three Equal Parts	Go	Hard
926	Flip String to Monotone Increasing	Go	Medium
925	Long Pressed Name	Go	Easy
924	Minimize Malware Spread	Go	Hard
923	3Sum With Multiplicity	Go	Medium
922	Sort Array By Parity II	Go	Easy
921	Minimum Add to Make Parentheses Valid	Go	Medium
920	Number of Music Playlists	Go	Hard
919	Complete Binary Tree Inserter	Go	Medium
918	Maximum Sum Circular Subarray	Go	Medium
917	Reverse Only Letters	Go	Easy
916	Word Subsets	Go	Medium
915	Partition Array into Disjoint Intervals	Go	Medium
914	X of a Kind in a Deck of Cards	Go	Easy
913	Cat and Mouse	Go	Hard
912	Sort an Array	Go	Medium
911	Online Election	Go	Medium
910	Smallest Range II	Go	Medium
909	Snakes and Ladders	Go	Medium
908	Smallest Range I	Go	Easy
907	Sum of Subarray Minimums	Go	Medium
906	Super Palindromes	Go	Hard
905	Sort Array By Parity	Go	Easy
904	Fruit Into Baskets	Go	Medium
903	Valid Permutations for DI Sequence	Go	Hard
902	Numbers At Most N Given Digit Set	Go	Hard
901	Online Stock Span	Go	Medium