Given a binary array, find the maximum length of a contiguous subarray with equal number of 0 and 1. Example 1: Input: [0,1] Output: 2 Explanation: [0, 1] is the longest contiguous subarray with equal number of 0 and 1. Example 2: Input: [0,1,0] Outp…

描述 Given a binary array, find the maximum length of a contiguous subarray with equal number of 0 and 1. 示例 Example 1: Input: [0,1] Output: 2 Explanation: [0, 1] is the longest contiguous subarray with equal number of 0 and 1. Example 2: Input: [0,1,0…

Given a sorted positive integer array nums and an integer n, add/patch elements to the array such that any number in range [1, n] inclusive can be formed by the sum of some elements in the array. Return the minimum number of patches required. Example…

Rotate an array of n elements to the right by k steps. For example, with n = 7 and k = 3, the array [1,2,3,4,5,6,7] is rotated to [5,6,7,1,2,3,4]. Note:Try to come up as many solutions as you can, there are at least 3 different ways to solve this pro…

A zero-indexed array A of length N contains all integers from 0 to N-1. Find and return the longest length of set S, where S[i] = {A[i], A[A[i]], A[A[A[i]]], ... } subjected to the rule below. Suppose the first element in S starts with the selection…

题意:给定一个数组,将该数组的后k位移动到前n-k位之前.(本题在编程珠玑中第二章有讲) 思路: 方法一:将后K位用vector容器装起来,再移动前n-k位到后面,再将容器内k位插到前面. class Solution { public: void rotate(int nums[], int n, int k) { || k==n ) return; k %= n; vector<int> cha; cha.reserve(k); int i; for(i=n-k; i<n; i++)…

给定一个二进制数组, 找到含有相同数量的 0 和 1 的最长连续子数组.示例 1:输入: [0,1]输出: 2说明: [0, 1] 是具有相同数量0和1的最长连续子数组. 示例 2:输入: [0,1,0]输出: 2说明: [0, 1] (或 [1, 0]) 是具有相同数量0和1的最长连续子数组.注意: 给定的二进制数组的长度不会超过50000.详见:https://leetcode.com/problems/contiguous-array/description/ Java实现: class…

525. Contiguous Array Add to List Description Submission Solutions Total Accepted: 2476 Total Submissions: 8220 Difficulty: Medium Contributors: bishwa Given a binary array, find the maximum length of a contiguous subarray with equal number of 0 and…

2018-07-08 13:24:31 问题描述: 问题求解: 问题规模已经给出是50000量级,显然只能是O(n),至多O(nlogn)的复杂度.本题使用DP和滑动数组都比较棘手,这里给出的方案是preSum + HashMap的策略来进行解决,可以说方法是比较巧妙的. public int findMaxLength(int[] nums) { int res = 0; HashMap<Integer, Integer> map = new HashMap<>(); for (…

STL中的list就是一双向链表,可高效地进行插入删除元素. List 是 C++标准程式库 中的一个 类 ,可以简单视之为双向 连结串行 ,以线性列的方式管理物件集合.list 的特色是在集合的任何位置增加或删除元素都很快,但是不支持随机存取.list 是 C++标准程式库 提供的众多容器(container)之一,除此之外还有 vector .set.map.…等等.list 以模板方式实现(即泛型),可以处理任意型别的变量,包括使用者自定义的资料型态,例如:它可以是一个放置整数(int)型…