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js中sum(2,3,4)和sum(2)(3)(4)都返回9并要求扩展性

网上有很多关于sum(1)(2)(3),sum(1,2,3)之类的面试题要求输出相同的结果6并要求可以满足扩展,即有多个参数时也能符合题设的要求,所以自己写了部分例子可以大概满足这些面试题的要求 <!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Document</title></head><…

编写一个求和函数sum，使输入sum(2)(3)或输入sum(2,3)，输出结果都为5

昨天的笔试题,做的一塌糊涂,题目考的都很基础而且很细,手写代码对我来说是硬伤啊.其中有一道是这个,然而看到题目的时候,根本没有想到arguments:然后现在就恶补一下. arguments:用在函数内部,表示传给该函数的所有的实参的集合. 虽然arguments对象并不是一个数组,但是访问单个参数的方式与访问数组元素的方式相同.例如:arguments[0],arguments[1]...arguments[n]. function foo(){ var sum = 0; console.lo…

leetcode 112. Path Sum 、 113. Path Sum II 、437. Path Sum III

112. Path Sum 自己的一个错误写法: class Solution { public: bool hasPathSum(TreeNode* root, int sum) { if(root == NULL) return false; ; return hasPathSum(root,sum,value); } bool hasPathSum(TreeNode* root,int sum,int value){ if(root == NULL){ if(value == sum) r…

leetcode 39. Combination Sum 、40. Combination Sum II 、216. Combination Sum III

39. Combination Sum 依旧与subsets问题相似,每次选择这个数是否参加到求和中 因为是可以重复的,所以每次递归还是在i上,如果不能重复,就可以变成i+1 class Solution { public: vector<vector<int>> combinationSum(vector<int>& candidates, int target) { vector<vector<int>> result; vector…

Leetcode 笔记 113 - Path Sum II

题目链接:Path Sum II | LeetCode OJ Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equals the given sum. For example: Given the below binary tree and sum = 22, 5 / \ 4 8 / / \ 11 13 4 / \ / \ 7 2 5 1 return [ [5,4,11,2],…

[LeetCode] Path Sum III 二叉树的路径和之三

You are given a binary tree in which each node contains an integer value. Find the number of paths that sum to a given value. The path does not need to start or end at the root or a leaf, but it must go downwards (traveling only from parent nodes to…

[LeetCode] Count of Range Sum 区间和计数

Given an integer array nums, return the number of range sums that lie in [lower, upper] inclusive.Range sum S(i, j) is defined as the sum of the elements in nums between indices i and j (i ≤ j), inclusive. Note:A naive algorithm of O(n2) is trivial.…

[LeetCode] Maximum Size Subarray Sum Equals k 最大子数组之和为k

Given an array nums and a target value k, find the maximum length of a subarray that sums to k. If there isn't one, return 0 instead. Example 1: Given nums = [1, -1, 5, -2, 3], k = 3, return 4. (because the subarray [1, -1, 5, -2] sums to 3 and is th…

[LeetCode] Range Sum Query 2D - Mutable 二维区域和检索 - 可变

Given a 2D matrix matrix, find the sum of the elements inside the rectangle defined by its upper left corner (row1, col1) and lower right corner (row2, col2). The above rectangle (with the red border) is defined by (row1, col1) = (2, 1) and (row2, co…

[LeetCode] Range Sum Query - Mutable 区域和检索 - 可变

Given an integer array nums, find the sum of the elements between indices i and j (i ≤ j), inclusive. The update(i, val) function modifies nums by updating the element at index i to val. Example: Given nums = [1, 3, 5] sumRange(0, 2) -> 9 update(1, 2…