HZOJ trade

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强烈谴责$skyh$的没$\Huge 脸$行为. 很经典的可反悔贪心,然而我一直以为是sbdp还一直想着怎么优化…… 正常的贪心肯定是不对的. 但是由于A-C=A-B+B-C, 所以用一个小根堆维护,每次将当前天的a加入,表示当前天可以买入, 如果堆顶小于a,取出堆顶,ans加上差,再次将当天的a加入,那么如果之后卖出更优则会减掉当前的a利用差价满足了贪心性质. #include<iostream> #include<cstring> #include<cstdio>…

HDOJ 1009. Fat Mouse' Trade 贪心结构体排序

FatMouse' Trade Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 56784 Accepted Submission(s): 19009 Problem Description FatMouse prepared M pounds of cat food, ready to trade with the cats g…

Hdu 1009 FatMouse' Trade

FatMouse' Trade Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 43381 Accepted Submission(s): 14499 Problem Description FatMouse prepared M pounds of cat food, ready to trade with the cats gu…

[题解]hdu 1009 FatMouse' Trade（贪心基础题）

Problem Description FatMouse prepared M pounds of cat food, ready to trade with the cats guarding the warehouse containing his favorite food, JavaBean. The warehouse has N rooms. The i-th room contains J[i] pounds of JavaBeans and requires F[i] pound…

ZOJ 2753 Min Cut (Destroy Trade Net)（无向图全局最小割）

题目大意给一个无向图,包含 N 个点和 M 条边,问最少删掉多少条边使得图分为不连通的两个部分,图中有重边数据范围:2<=N<=500, 0<=M<=N*(N-1)/2 做法分析典型的无向图全局最小割,使用 Stoer-Wagner 算法 Stoer-Wagner 算法共执行 n-1 次 BFS,每次 BFS 得到一个当前图的最小 S-T 割,并且将最后 BFS 的两个点缩点,n-1 次 BFS 得到 n-1 个最小 S-T 割中的最小者就是整个无向图的全局最小割,为了讲述每…

HDU 3401 Trade dp+单调队列优化

题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=3401 Trade Time Limit: 2000/1000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others) 问题描述 Recently, lxhgww is addicted to stock, he finds some regular patterns after a few days' study. He forecast…

【HDU 1009】FatMouse' Trade

题 Description FatMouse prepared M pounds of cat food, ready to trade with the cats guarding the warehouse containing his favorite food, JavaBean. The warehouse has N rooms. The i-th room contains J[i] pounds of JavaBeans and requires F[i] pounds of c…