2020-02-11 12:01:21 问题描述: 问题求解: 本题的难度个人感觉还是蛮大的,主要是不容易想到O(n)的解. 对于 ...a, [b, ... , c], d, ...,如果我们将其中的[b, ... , c]进行翻转. 如果两线段有重复,必减小原先的值. 如果两线段无重复,必增加原先的值,且diff为2 * gap. 可通过如下的图进行分类讨论. 最后,再对边界做一个处理即可. int inf = (int)1e9; public int maxValueAfterRevers…

2020-02-03 20:43:46 问题描述: 问题求解: public boolean canTransform(String start, String end) { int n = start.length(); List<int[]> s = new ArrayList<>(); List<int[]> e = new ArrayList<>(); for (int i = 0; i < n; i++) { char c = start.c…

When I finished reading this problem,I thought I could solve it by scanning every single subarray in the array,and the time complexity is cubic.Every subarray could be the eventual one whose sum is the largest,so I did make a conclusion that the best…

leetcode - 53. Maximum Subarray - Easy descrition 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 th…

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:类似Maximum Subarray,不同的是 max(max_local*n…

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: If you have figur…

414. Third Maximum Number 给一个非空的整数数组,找到这个数组中第三大的值,如果不存在,那么返回最大的值.要求时间复杂度为o(n) 例如: Example 1: Input: [3, 2, 1] Output: 1 Explanation: The third maximum is 1. Example 2: Input: [1, 2] Output: 2 Explanation: The third maximum does not exist, so the maxi…

Description You are given an array \(a\) consisting of \(n\) integers. Beauty of array is the maximum sum of some consecutive subarray of this array (this subarray may be empty). For example, the beauty of the array [10, -5, 10, -4, 1] is 15, and the…

D. Beautiful Array time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given an array aa consisting of nn integers. Beauty of array is the maximum sum of some consecutive subarray of t…

Educational Codeforces Round 63 (Rated for Div. 2) D. Beautiful Array time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given an array aa consisting of nn integers. Beauty of array i…