- 0001-twoSum:
array,dynamic-programming - 0002-addTwoNumbers:
link,math - 0003-lengthOfLongestSubstring:
string,sliding-window - 0004-medianOfTwoSortedArrays:
array,median - 0005-longestPalindrome:
string - 0006-zConvert:
string - 0007-reverse:
number,reverse,bit - 0008-atoi:
string - 0009-isPalindrome:
math,bit - 0010-isMatch:
string,match,backtracking - 0011-maxArea:
math,ptr - 0012-intToRoman:
math,bit - 0013-romanToInt:
math,bit - 0014-longestCommonPrefix:
string - 0015-threeSum:
array,sum - 0016-threeSumClosest:
array,sum - 0017-letterCombinations:
string,backtracking - 0018-fourSum:
array,sum - 0019-removeNthFromEnd:
link,ptr - 0020-isValid:
string,stack,match - 0021-mergeTwoLists:
link,merge,sort - 0022-generateParenthesis:
string,backtracking - 0023-mergeKLists:
link,merge,sort - 0024-swapPairs:
swap,link - 0025-reverseKGroup:
link,reverse - 0026-removeDuplicates:
array,remove,zero-memory - 0027-removeElement:
array,remove,zero-memory - 0028-strStr:
string,find,substring - 0029-divide:
divide,<<,>>,- - 0030-findSubstring:
string,hashmap - 0031-nextPermutation:
array,math - 0032-longestValidParentheses:
string,() - 0033-rotatedSearch:
array,sort,rotated - 0034-searchRange:
array,search,range - 0035-searchInsert:
array,search - 0036-isValidSudoku:
matrix,sudoku - 0037-solveSudoku:
matrix,sudoku,backtracking - 0038-countArraySay:
count,say - 0039-combinationSum:
array,find set,sum,backtracking - 0040-combinationSum2:
array,find set,sum,backtracking - 0041-firstMissingPositive:
array,find - 0042-trap:
array,ptr - 0043-multiply:
string,multiply - 0044-isMatchWildcard:
string,match,backtracking - 0045-jump:
array,math - 0046-permute:
array,permute,backtracking - 0047-permuteUnique:
array,permute,unique,backtracking - 0048-rotate:
rotate,matrix - 0049-groupAnagrams:
array,string - 0050-myPow:
math,pow - 0051-solveNQueens:
matrix,backtracking - 0052-totalNQueens:
matrix,backtracking - 0053-maxSubArray:
array,max,subarray - 0054-spiralOrder:
matrix,order - 0055-canJump:
array - 0056-mergeIntervals:
array,merge - 0057-insertIntervals:
array,insert - 0058-lengthOfLastWord:
string,last - 0059-generateSpiralMatrix:
generate,spiral,matrix - 0060-getPermutation:
combination,backtracking - 0061-rotateRight:
link,rotate - 0062-uniquePaths:
dp - 0063-uniquePathsWithObstacles:
dp - 0064-minPathSum:
min,path,sum - 0065-isNumber:
string,isNumber - 0066-plusOne:
array - 0067-addBinary:
add,string,binary - 0068-fullJustify:
full,justify,string - 0069-mySqrt:
math,sqrt - 0070-climbStairs:
math,fib - 0071-simplifyPath:
string,clear,path - 0072-minDistance:
string - 0073-setZeroes:
matrix,zero - 0074-searchMatrix:
matrix,search,sort-array,binary-search - 0075-sortColors:
array,sort - 0076-minWindow:
string,sliding window - 0077-combine:
array,combine,backtracking - 0078-subsets:
array,combine,backtracking - 0079-exits:
matrix,backtracking - 0080-removeDuplicatesCount:
array,remove duplicates - 0081-rotatedSearchDuplicate:
array,search - 0082-deleteDuplicatesII:
link - 0083-deleteDuplicatesI:
link - 0084-largestRectangleArea:
array,stack - 0085-maximalRectangle:
matrix,dp - 0086-partitionLink:
link,partition - 0087-isScramble:
string,dp - 0088-mergeSort:
array,merge,sort - 0089-grayCode:
bit - 0090-subsetsWithDup:
array,combine,backtracking - 0091-numDecodings:
string,decode - 0092-reverseBetween:
link,reverse - 0093-restoreIpAddresses:
string,ip,backtracking - 0094-inorderTraversal:
tree,stack - 0095-generateTree:
tree - 0096-numTrees:
tree,math - 0097-isInterleave:
string,dp - 0098-isValidBST:
tree,search tree - 0099-recoverTree:
tree,search tree - 0100-isSameTree:
tree,same - 0101-isSymmetric:
tree,symmetric - 0102-levelOrder:
tree,bfs - 0103-zigzagLevelOrder:
tree,bfs - 0104-maxDepth:
tree,bfs - 0105-buildPreTree:
tree - 0106-buildPostTree:
tree - 0107-levelOrderBottom:
tree - 0108-sortedArrayToBST:
tree - 0109-sortedListToBST:
tree,link - 0110-isBalanced:
tree - 0111-minDepth:
tree,depth - 0112-hasPathSum:
tree,bfs - 0113-pathSum:
tree,dfs,backtracking - 0114-flatten:
tree,dfs - 0115-numDistinct:
string,dp - 0116-connect:
tree,bfs - 0117-connect-II:
tree,bfs - 0118-generateTriangle:
array - 0119-getRowTriangle:
array - 0120-minimumTotal:
array,dp - 0121-maxProfit:
array - 0122-maxProfitII:
array - 0122-maxProfitIII:
array - 0124-maxPathSum:
tree,dfs - 0125-isPalindrome:
string - 0126-findLadders:
string,backtracking - 0127-ladderLength:
string,queue - 0128-longestConsecutive:
array,set - 0130-solve:
matrix,dfs - 0133-cloneGraph:
graph,bfs - 0136-singleNumber:
math - 0141-hasCycle:
link - 0142-detectCycle:
link - 0143-reorderList:
link - 0144-preOrderTraversal:
tree,loop,stack - 0146-lruCache:
link,cache,lru - 0151-reverseWords:
string - 0152-maxProduct:
array - 0167-towSumII:
array - 0169-majorityElement:
math,array - 0174-calculateMinimumHP:
matrix,dp - 0190-reverseBits:
bit - 0198-rob:
array,dp - 0199-rightSideView:
tree,bfs - 0200-numIslands:
matrix,land - 0202-isHappy:
number,math - 0206-reverseList:
reverse,link - 0207-canFinish:
graph - 0209-minSubArrayLen:
array - 0210-findOrder:
array,topological-sort - 0215-findKthLargest:
array,heap - 0217-containsDuplicate:
array,duplicate - 0224-calculate:
string,calculate - 0236-lowestCommonAncestor:
tree,bfs,dfs - 0238-productExceptSelf:
array,math - 0287-findDuplicate:
array,duplicate - 0289-gameOfLife:
matrix - 0300-lengthOfLIS:
array - 0309-maxProfitWithCooldown:
array,dp - 0312-maxCoins:
array,dp - 0315-countSmaller:
array,sort - 0322-coinChange:
math - 0332-FindItinerary:
matrix,dfs - 0336-palindromePairs:
string,map - 0337-rob:
tree,dfs - 0350-intersect:
array,map - 0355-twtter:
twtter - 0365-canMeasureWater:
math,gcd - 0378-kthSmallest:
matrix - 0392-IsSubsequence:
string - 0409-longestPalindrome:
string,palindrome - 0410-splitArray:
array,dp - 0415-addStrings:
string,add - 0445-addTowNumberII:
link,add - 0466-getMaxRepetitions:
string - 0460-lfuCache:
cache,map,link,lfu - 0486-predictTheWinner:
array,dp - 0529-updateBoard:
matrix,dfs - 0542-updateMatrix:
matrix,dp - 0543-diameterOfBinaryTree:
array,dfs - 0546-removeBoxes:
array,dp - 0557-reverseWordsIII:
string - 0560-subArraySum:
array - 0572-isSubtree:
tree,dfs - 0632-smallestRange:
array,heap - 0680-validPalindrome:
string - 0695-maxAreaOfIsland:
matrix,dfs - 0696-countBinarySubstrings:
string - 0739-dailyTemperatures:
array - 0766-isToeplitzMatrix:
matrix - 0785-isBipartite:
matrix - 0820-minimumLengthEncoding:
array,encode - 0832-flipAndInvertImage:
matrix - 0836-isRectangleOverlap:
matrix,overlap - 0837-new21Game:
dp - 0841-canVisitAllRooms:
bfs - 0876-middleMode:
middle,link,ptr - 0887-superEggDrop:
math,dp - 0892-surfaceArea:
matrix,area - 0912-sortArray:
array,quick,sort - 0914-hasGroupsSizeX:
array,group,gcd - 0945-minIncrementForUnique:
sum,array - 0983-mincostTickets:
array,dp - 0990-equationsPossible:
array,string - 0994-orangesRotting:
matrix,bfs - 0999-numRookCaptures:
matrix - 1004-longestOnes:
array,sliding-window - 1013-canThreePartsEqualSum:
array,ptr - 1014-maxScoreSightseeingPair:
array,dp - 1028-recoverFromPreorder:
tree, `` - 1095-findInMountainArray:
array,binary-search - 1103-distributeCandies:
math,arithmetic-progression - 1111-maxDepthAfterSplit:
string - 1160-countCharacters:
string - 1162-maxDistance:
matrix,bfs - 1248-numberOfSubarrays:
array - 1371-findTheLongestSubstring:
string - 1431-kidsWithCandies:
array - 面试题-01.06-compressString:
string,compress - 面试题-01.07-rotate:
rotate,matrix - 面试题-02.01-removeDuplicateNodes:
link - 面试题-08.11-waysToChange:
math - 面试题-10.01-sortedMerge:
array,index - 面试题-13-movingCount:
dp - 面试题-16.03-intersection:
math - 面试题-16.11-divingBoard:
math - 面试题-16.18-patternMatching:
string - 面试题-17.13-respace:
string - 面试题-17.16-massage:
array,sum - 面试题-29-spiralOrder:
matrix - 面试题-40-getLeastNumbers:
array - 面试题-46-translateNum:
number,backtracking - 面试题-51-reversePairs:
array - 面试题-56-singleNumbers:
number,math,bit - 面试题-57-II-findContinuousSequence:
arithmetic-progression - 面试题-59-II-maxQueue:
link,stack - 面试题-62-lastRemaining:
math - 面试题-64-sumNums:
math