Here I post a way to solve maximum sub array problem: The problem described like this: here is an array like [1,4,5,32,4,8,7,1,23,88], we should find a sub array such that the difference between tail and head of the sub array is maximum. def getMaxSu…

Chef and Rainbow Array Problem Code: RAINBOWA Chef likes all arrays equally. But he likes some arrays more equally than others. In particular, he loves Rainbow Arrays. An array is Rainbow if it has the following structure: First a1 elements equal 1.…

Almost Sorted Array Problem Description We are all familiar with sorting algorithms: quick sort, merge sort, heap sort, insertion sort, selection sort, bubble sort, etc. But sometimes it is an overkill to use these algorithms for an almost sorted arr…

Mahesh and his lost array   Problem code: ANUMLA   Submit All Submissions   All submissions for this problem are available. Read problems statements in Mandarin Chinese and Russian as well. Mahesh got a beautiful array named A as a birthday gift from…

并不是很正规的.每个人自愿参与自愿退出,马哥找题(马哥超nice么么哒). 放假第一周与放假结束前一周 2015-01-26 http://acm.hust.edu.cn/vjudge/contest/view.action?cid=68304#overview password: scau0126     ID Origin Title   13 / 29 Problem A CodeChef SUBGCD Subarray GCD   8 / 50 Problem B CodeChef SU…

A. Another Query on Array Problem B. Board Covering C. Cumulative Sums 题意 \(A_1=1,A_i=A_{i-1}+sod(A_{i-1}),sod(X)\)为\(X\)的十进制数位和 \(S_n=\sum_{i=1}^{n}A_i\),求\(S_n\)模\(10^9+7\),\(n≤10^{15}\) 做法 先考虑怎么求\(A_n\)的值 初步想法:把\(A_i\)拆成高位和低位,设高位为\(X\),固定高位,那么对低位的…

CodeForces 构造题专项解题报告 \(\newcommand \m \mathbf\)\(\newcommand \oper \operatorname\) \(\text{By DaiRuiChen007}\) 来源:CodeForces *constructive algorithms 推荐阅读: 11. [1672F] - Array Shuffling & Checker for Array Shuffling 41. [1526D] - Kill Anton 1. [1772F…

Given an array where elements are sorted in ascending order, convert it to a height balanced BST. For this problem, a height-balanced binary tree is defined as a binary tree in which the depth of the two subtrees of every node never differ by more th…

Given an array A of non-negative integers, return an array consisting of all the even elements of A, followed by all the odd elements of A. You may return any answer array that satisfies this condition. Example 1: Input: [3,1,2,4] Output: [2,4,3,1] T…

1748E Yet Another Array Counting Problem 目录 1748E Yet Another Array Counting Problem 题目大意: 做法 code 题目传送门 题目大意: 现在有一个长度为\(n\)的数组\(a\) , 现在你要找到一个数组\(b\)的每一个数都\(<= m\) 使得在\(n\)中的任意区间\([l , r]\)满足\(max_{i = l} ^ ra_i = max_{i = l} ^ rb_i\) 求方案数 $ mod 1e9…