I tried to code solution for the Segment With Maximum Sum problem from the Segment Trees Section in ITMO pilot course. Link To the Question class Sgtree{ private: vl seg,pref,suff,sum; int _n; void leaf_update(ll node,ll val) { pref[node] = val; suff[node] = val; seg[node] =...
I want to find the maximum sum in a 2D matrix such that: You can pick only 1 element from each row You cannot pick a column that has been picked before. Example: matrix = [ [12, 1, 1, 1], [13, 10, 1, 1], [40, 1, 1, 12] ] Solution: We pick 12 from 1st row Now w...
2019-12-16 16:22 − [题目](https://leetcode.com/problems/maximum-side-length-of-a-square-with-sum-less-than-or-equal-to-threshold/) 我是按照边进行二分的 ``` class Solution { public: ... Shendu.CC 0 327 Codeforces 547C/548E - Mike and Foam 题解 2019-12-19 21:57 −...
Maximum Sum of Products(区间DP) 题目链接 题意 给你两个长度为n的数列a和b,要求你最多翻转一次a序列的一段连续的区间,使得n∑i=1ai∗bi最大。 分析 首先暴力方法是先枚举区间长度再枚举起点,整个过程是O(n2)的,然后就是如何O(1)求出翻转后的值,先去找了一下每个翻转策略之间有没有冗余部分,发现没...
Clearly, if all the input numbers had a different length, the problem would have a trivial solution: just iterate over the input numbers in decreasing order by length, choosing each number if and only if XORing it with the maximum so far increases the maximum, i.e., if and only if its...
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que3.sum=que1.sum+que2.sum; que3.lmax=max(que1.lmax,que1.sum+que2.lmax); que3.rmax=max(que2.rmax,que2.sum+que1.rmax); que3.maxn=max(max(que1.maxn,que2.maxn),que1.rmax+que2.lmax);if(que3.lmax==que1.lmax) que3.ll=que1.ll,que3.lr=que1.lr;elseque3.ll=que1.ll...
codeforces 871A Maximum splitting http://www.elijahqi.win/archives/1257 You are given several queries. In the i-th query you are given a single positive integer ni. You are to represent ni as a sum of maximum possible number of compos......
Codeforces 1107G Vasya and Maximum Profit [单调栈] 洛谷Codeforces 我竟然能在有生之年踩标算. 思路 首先考虑暴力:枚举左右端点直接计算. 考虑记录\(sum_x=\sum_{i=1}^x c_i\),设选\([l,r]\)时那个奇怪东西的平方为\(f(l,r)\),使劲推式子: \[ ans_{l,r}=(r-l+1)\times a-sum_r+su...
Output the resulting graph or report that no solution exists. Input The first line contains a single integer n (3≤n≤500) — the number of vertices in the graph. The second line contains n integers a1,a2,…,an (1≤ai≤n−1) — the upper limits to vertex degrees. ...