Add Date 2014-09-23 Maximum Product Subarray Find the contiguous subarray within an array (containing at least one number) which has the largest product. For example, given the array [2,3,-2,4],the contiguous subarray [2,3] has the largest product = …

Find the contiguous subarray within an array (containing at least one number) which has the largest product. For example, given the array [2,3,-2,4],the contiguous subarray [2,3] has the largest product = 6. 求连续子序列最大乘积,类似于求连续子序列最大和,但是乘法还涉及到符号的问题,比较方便…

Find the contiguous subarray within an array (containing at least one number) which has the largest product. For example, given the array [2,3,-2,4],the contiguous subarray [2,3] has the largest product = 6. 解题思路: 求连续子串和/积系列,最优的方法是只遍历一遍,实现o(n)的时间复杂度.…

题目: Find the contiguous subarray within an array (containing at least one number) which has the largest product. For example, given the array [2,3,-2,4],the contiguous subarray [2,3] has the largest product = 6. 思路: 其实子数组乘积最大值的可能性为:累乘的最大值碰到了一个正数:或者,累…

Given a string array words, find the maximum value of length(word[i]) * length(word[j]) where the two words do not share common letters. You may assume that each word will contain only lower case letters. If no such two words exist, return 0. Example…

题目链接:Maximum Product Subarray solutions同步在github 题目很简单,给一个数组,求一个连续的子数组,使得数组元素之积最大.这是求连续最大子序列和的加强版,我们可以先看看求连续最大子序列和的题目maximum-subarray,这题不难,我们举个例子. 假设数组[1, 2, -4, 5, -1, 10],前两个相加后得到3,更新最大值(为3),然后再加上-4后,和变成-1了,这时我们发现如果-1去加上5,不如舍弃前面相加的sum,5单独重新开始继续往后相加…

Given an integer array nums, find the contiguous subarray within an array (containing at least one number) which has the largest product. Example 1: Input: [2,3,-2,4] Output: 6 Explanation: [2,3] has the largest product 6. Example 2: Input: [-2,0,-1]…

Find the contiguous subarray within an array (containing at least one number) which has the largest product. For example, given the array [2,3,-2,4],the contiguous subarray [2,3] has the largest product = 6. 题目标签:Array, Dynamic Programming 题目给了我们一个nu…

1.   Maximum Subarray (#53) Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [-2, 1, -3, 4, -1, 2, 1, -5, 4], the contiguous subarray [4, -1, 2, 1] has the largest s…

Maximum Subarray Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [−2,1,−3,4,−1,2,1,−5,4],the contiguous subarray [4,−1,2,1] has the largest sum = 6. More practice:…

这道题是LeetCode里的第53道题. 题目描述: 给定一个整数数组 nums ,找到一个具有最大和的连续子数组(子数组最少包含一个元素),返回其最大和. 示例: 输入: [-2,1,-3,4,-1,2,1,-5,4], 输出: 6 解释: 连续子数组 [4,-1,2,1] 的和最大,为 6. 进阶: 如果你已经实现复杂度为 O(n) 的解法,尝试使用更为精妙的分治法求解. 简单的动态规划题,如果之前接触过动态规划的话很容易得出答案,没有的话估计得想一阵子. 不多废话,我先介绍一下什么是动态规…

题目: Find the contiguous subarray within an array (containing at least one number) which has the largest product. For example, given the array [2,3,-2,4], the contiguous subarray [2,3] has the largest product = 6. 题意: 题目中给出一个(至少包含一个元素)整形数组,求一个子数组(元素连续…

Find the contiguous subarray within an array (containing at least one number) which has the largest product. For example, given the array [2,3,-2,4], the contiguous subarray [2,3] has the largest product = 6. 解题思路: 计算连续的积最大,由于会有负数出现,因此需要用两个int表示包含num…

Find the contiguous subarray within an array (containing at least one number) which has the largest product. For example, given the array [2,3,-2,4],the contiguous subarray [2,3] has the largest product = 6. 找出最大的相乘的数字,很简单,代码还可以优化的地方很多.但是速度还可以. publi…

Find the contiguous subarray within an array (containing at least one number) which has the largest product. For example, given the array [2,3,-2,4],the contiguous subarray [2,3] has the largest product = 6. 分析:这个题目就是让你求连续的子数组的乘积的最大值. (1)在数组中没有0的情况下,…

1.(原文)问题描述 Find the contiguous subarray within an array (containing at least one number) which has the largest product. For example, given the array [2,3,-2,4], the contiguous subarray [2,3] has the largest product = 6. 2.翻译 找最大的数组中的子数组乘积 例如,给予的数组是[2…

Given an integer array nums, find the contiguous subarray within an array (containing at least one number) which has the largest product. Example 1: Input: [2,3,-2,4] Output: 6 Explanation: [2,3] has the largest product 6. Example 2: Input: [-2,0,-1]…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 队列 日期 题目地址:https://leetcode.com/problems/shortest-subarray-with-sum-at-least-k/ 题目描述 Return the length of the shortest, non-empty, contiguous subarray of A with sum at least K.…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 解题方法 两次遍历 日期 题目地址:https://leetcode.com/problems/product-of-array-except-self/description/ 题目描述 Given an array of n integers where n > 1, nums, return an array output such that output[i]…

Maximum Gap Given an unsorted array, find the maximum difference between the successive elements in its sorted form. Try to solve it in linear time/space. Return 0 if the array contains less than 2 elements. You may assume all elements in the array a…

Given an unsorted array, find the maximum difference between the successive elements in its sorted form. Try to solve it in linear time/space. Return 0 if the array contains less than 2 elements. You may assume all elements in the array are non-negat…

Given an array of n positive integers and a positive integer s, find the minimal length of a subarray of which the sum ≥ s. If there isn't one, return 0 instead. For example, given the array [2,3,1,2,4,3] and s = 7,the subarray [4,3] has the minimal…

Product of Array Except Self Given an array of n integers where n > 1, nums, return an array output such that output[i] is equal to the product of all the elements of nums except nums[i]. Solve it without division and in O(n). For example, given [1,2…

http://oj.leetcode.com/problems/maximum-depth-of-binary-tree/ public class Solution { public int maxDepth(TreeNode root) { if(root!=null){ int depth=0; InOrder(root,depth); } return max; } public int max=0; private void InOrder(TreeNode root, int dep…

这道题是LeetCode里的第104道题. 给出题目: 给定一个二叉树,找出其最大深度. 二叉树的深度为根节点到最远叶子节点的最长路径上的节点数. 说明: 叶子节点是指没有子节点的节点. 示例: 给定二叉树 [3,9,20,null,null,15,7], 3 / \ 9 20 / \ 15 7 返回它的最大深度 3 . DFS 递归算法,简单的二叉树题.如果看不懂代码,建议学习一下二叉树,这可是基础啊! 给出代码: 递归法: /** * Definition for a binary tree…

题目如下: 解题思路:本题需要用到这么一个数学定理.对于任意三个整数a,b,k(k !=0),如果 a%k = b%k,那么(a-b)%k = 0.利用这个定理,我们可以对数组从头开始进行求和,同时利用字典保存余数(key:余数,value:最早出现这个余数的元素下标),每累加一个元素都对k取余数,如果余数在字典中存在并且两个元素之间的下标差大于等于2,即表示存在这样的subarray.而对于k=0的情况,必须要出现至少两个出现至少连续两个0才能符合条件:当然,因为0*k = 0,所以如果数组中…

原题地址 简单动态规划,跟最大子串和类似. 一维状态空间可以经过压缩变成常数空间. 代码: int maxProduct(int A[], int n) { ) ; ]; ]; ]; ; i >= ; i--) { int tmp = minp; minp = min(A[i], min(A[i] * minp, A[i] * maxp)); maxp = max(A[i], max(A[i] * tmp, A[i] * maxp)); res = max(res, maxp); } retur…

[2]Add Two Numbers (2018年12月23日,review) 链表的高精度加法. 题解:链表专题:https://www.cnblogs.com/zhangwanying/p/9797184.html [7]Reverse Integer (2018年12月23日, review) 给了一个32位的整数,返回它的reverse后的整数.如果reverse后的数超过了整数的范围,就返回 0. Example 1: Input: 123 Output: 321 Example 2:…

[78]Subsets 给了一个 distinct 的数组,返回它所有的子集. Example: Input: nums = [,,] Output: [ [], [], [], [,,], [,], [,], [,], [] ] 题解:我是直接dfs(backtracking)了,有个小地方写错了(dfs那里),至少调整了十多分钟,下次不要写错了. class Solution { public: vector<vector<int>> subsets(vector<int…

[1]Two Sum (2018年11月9日,k-sum专题,算法群衍生题) 给了一个数组 nums, 和一个 target 数字,要求返回一个下标的 pair, 使得这两个元素相加等于 target . 题解:我这次最大范围的优化代码, hash-table + one pass,时间复杂度 O(N),空间复杂度 O(N).重点在于动态找,一边生成hash-table的同时去找答案,不是先生成hash-table再开始找答案. //这种类似 hash 的能用 unordered_map 就不要…