codeforces 1155D Beautiful Array 解题报告 codeforces 1155D Beautiful Array 解题报告 题意:选出数组中的一组连续子序列(可以一个元素也不选),子序列里每个元素都要乘上提供的x值再放回原数组中,最后找出改变后的数组中的所有连续子序列中的最大和的值。 解题思路:dp题,要把求最大子序列和的思维改善一下...
定义三个dp数组:dp1[]、dp2[]、dp3[] 其中dp1[i] 表示以a[i]结尾的最大子段和 dp2[i]表示以a[i]*x结尾的最大子段和 dp3[i]表示以a[i]结尾,且a[i]前存在一个区间的数组 * x,该情况下的最大子段和 转移方程:dp1[i] = a[i] + (dp1[i-1] > 0 ? dp1[i-1] : 0) dp2[i] = a[...
Beautiful Array CodeForces - 1155D (dp) Beautiful Array 题意: 给你一个序列,可以让一个区间 * k , 也可以不乘 ,让序列的区间和最大 思路: 动态规划 dp[1] 表示当前节点当前节点更新区间之前 , dp[2] 表示当前节点在更新区间中, dp[3]表示当前节点已经在更新区间之后 View Code...
Codeforces 1155D Beautiful Array 给你n个数字的数组 然后还有一个 x,你可以选择一段区间乘上 x,输出最大子段和。用一个二维dp来做就行了 AC代码: #include<cstdio> #include<cstring> #include<iostream> #include<algorithm> #include<vector> #include<stdlib.h> #include<queue> #include #include<set>...
D. Beautiful Array Educational Codeforces Round 63 (Rated for Div. 2)(DP),题目来源:https://codeforces.com/contest/1155/problem/D题意:给你一个数组和一个数字x,求当前数组最
北邮校赛 I. Beautiful Array(DP) 2017-04-30 10:50 −... 贱人方 0 563 Codeforces Round #609 (Div. 2) C. Long Beautiful Integer 2019-12-23 10:53 −# 链接: https://codeforces.com/contest/1269/problem/C # 题意: You are given an integer x of n digits a1,a2,…,an, which ...
【 Educational Codeforces Round 63 D. Beautiful Array】DP D. Beautiful Array 题意 给你一个长度为n的数组和一个x,现在可以选择至多一段子区间,让这个区间同时乘以x,之后让整个数组的最大子段和最大。 做法 dp[i][0]表示以i为终点还没进入加倍区的最大子段和。 dp[i][1]表示以i为终点在加倍区内...
An array aa is called ugly if it contains at least one element which is equal to the sum of all elements before it. If the array is not ugly, it is beautiful. For example: the array [6,3,9,6][6,3,9,6] is ugly: the element 99 is equal to 6+36+3; the array [5,5,7...
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1 <= X <=10101010 Time Limit: 1 sec If anyone got any ideas orknowhow to solve this questions in the given constraint, please do tell. Also under what categories such questions fall ? And it would be great help if anyone can share a bunch of resources from where beginners like me ca...