CF414D Mashmokh and Water Tanks 洛谷评测传送门 题目描述 Mashmokh is playing a new game. In the beginning he has kk liters of water and pp coins. Additionally he has a rooted tree (an undirected connected acyclic graph) that consists of mm vertices. Each vertex…

codeforces 414D Mashmokh and Water Tanks 题意 题解 \(a_i\):第 \(i\) 层的结点个数. \(b_i\):第 \(i\) 层初始有水的结点个数. 如果不允许关闭水塔,最后的答案就是 \(max\{a_i\}\). 现在允许关闭部分水塔,我们可以把一些连续层数的水汇聚到同一层.假设我们汇聚 \([l, r]\) 范围的水,总花费是 \(\Sigma_{i=l}^r\{b_i*(r-i)\}\). 双指针实现即可. 代码 #include<bits…

problem Mashmokh and Water Tanks 题目大意 给你一棵树,k升水,p块钱,进行一次游戏. 在游戏进行前,可以在任意个节点上放置1升水(总数不超过k) 游戏进行若干轮,每轮游戏开放所有节点,可以选择若干个节点关闭,代价为该节点的水数量.然后所有未关闭的节点的水流向它的父亲(不会连续移动).最后,根节点中的水会被取走,水的数量为该轮游戏的盈利. 求盈利最大的某轮游戏的盈利. 解题分析 在放置水的选择上,应该尽量选择深度相邻的节点,即将所有节点按照深度排序后,所选择放水的…

Petya and Pipes Time Limit: 1000ms Memory Limit: 262144KB This problem will be judged on CodeForces. Original ID: 362E64-bit integer IO format: %I64d      Java class name: (Any)   A little boy Petya dreams of growing up and becoming the Head Berland…

A. Non-zero Description: Guy-Manuel and Thomas have an array \(a\) of \(n\) integers [\(a_1, a_2, \dots, a_n\)]. In one step they can add \(1\) to any element of the array. Formally, in one step they can choose any integer index \(i\) (\(1 \le i \le…

Given an m x n matrix of non-negative integers representing the height of each unit cell in a continent, the "Pacific ocean" touches the left and top edges of the matrix and the "Atlantic ocean" touches the right and bottom edges. Wate…

Given an m x n matrix of positive integers representing the height of each unit cell in a 2D elevation map, compute the volume of water it is able to trap after raining. Note: Both m and n are less than 110. The height of each unit cell is greater th…

You are given two jugs with capacities x and y litres. There is an infinite amount of water supply available. You need to determine whether it is possible to measure exactly z litres using these two jugs. If z liters of water is measurable, you must…

Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining. For example, Given [0,1,0,2,1,0,1,3,2,1,2,1], return 6. The above elevation map is represented by a…

Given n non-negative integers a1, a2, ..., an, where each represents a point at coordinate (i, ai). n vertical lines are drawn such that the two endpoints of line i is at (i, ai) and (i, 0). Find two lines, which together with x-axis forms a containe…