poj_1456 贪心

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题目大意一家超市,要卖出N种物品(每种物品各一个),每种物品都有一个卖出截止日期Di(在该日期之前卖出可以获得收益,否则就无法卖出),且每种物品被卖出都有一个收益值Pi. 卖出每个物品需要耗时1天,且任一时刻只能卖出一个物品.给出这N种物品的Di和Pi,求最大收益值. 题目分析求最优值问题,可以考虑动态规划.贪心.搜索+剪枝等算法.尝试用贪心法来分析. 题目是要卖出物品,每天只能卖出一个,最多只能卖出X个(X为所有物品中最大的deadline值).考虑第D天,需要卖出哪个物品呢? 如果D从1…

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