说明:每次只能向下或者向右... <= grid[i][j] <= 100解题方法: 1. 只关注右端或者下端哪一个小,并不能决定这条路径,此时选择dp二维数组来保存各点至原点总路径数据。 此时再往后分析时候,就可以比较 LeetCode238——除自身以外数组的乘积 /product-of-array-except-self/description/题目描述: 知识点:数组...
如果【i,j】的累加和为k,那么i之前的累加和为sum1,j之前的累加和为sum2,则存在sum2 - sum1 = k 所以我们简历Map存储累计和sum出现的次数,如果sum-k存在于map中,则累加和为k的子数组一定存在。 publicintsubarraySum(int[] nums,intk){ HashMap<Integer, Integer> map =newHashMap<>(); map.put(0,...
关关的刷题日记10——Leetcode 1. Two Sum 方法1 关小刷刷题10 – Leetcode 1...Two Sum 方法1 题目 Given an array of integers, return indices of the two numbers such that they add up to...= 2 + 7 = 9,return [0, 1]...two sum, three sum都是很经典的题目,最好自己想出答案,否则...
Given an array nums of n integers, are there elements a, b, c in nums such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero.Note:The solution set must not contain duplicate triplets.Example...
This problem is similar with Product of Array Except Self in regard with the separated left and right DP arrays. Given an arraynumsofnintegers wheren> 1, return an arrayoutputsuch thatoutput[i]is equal to the product of all the elements ofnumsexceptnums[i]. ...
0238-product-of-array-except-self.go 0239-sliding-window-maximum.go 0242-valid-anagram.go 0263-ugly-number.go 0268-missing-number.go 0271-encode-and-decode-strings.go 0279-perfect-squares.go 0283-move-zeroes.go 0287-find-the-duplicate-number.go 0290-word-pattern.go 0295-find-median-from-dat...
Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution. Example: Given nums = [2, 7, 11, 15], target = 9, Because nums[0] + nums[1] = 2 + 7 = 9, return [...
Find all possible combinations ofknumbers that add up to a numbern, given that only numbers from 1 to 9 can be used and each combination should be a unique set of numbers. Ensure that numbers within the set are sorted in ascending order. ...
0235-lowest-common-ancestor-of-a-binary-search-tree.cpp 0236-power-of-three.cpp 0238-product-of-array-except-self.cpp 0239-sliding-window-maximum.cpp 0242-valid-anagram.cpp 0252-meeting-rooms.cpp 0253-meeting-rooms-ii.cpp 0261-graph-valid-tree.cpp 0263-ugly-number.cpp 0268-missing-number....
https://leetcode.com/problems/sum-of-even-numbers-after-queries/ We have an arrayAof integers, and an arrayqueriesof queries. For thei-th queryval = queries[i][0], index = queries[i][1], we addvaltoA[index]. Then, the answer to thei-th query is the sum of the even values of...