3622:Gourmet Grazers

题目描述

Like so many others, the cows have developed very haughty tastes and will no longer graze on just any grass. Instead, Farmer John must purchase gourmet organic grass at the Green Grass Grocers store for each of his N (1 ≤ N ≤ 100,000) cows.

Each cow i demands grass of price at least Ai (1 ≤ Ai ≤ 1,000,000,000) and with a greenness score at least Bi (1 ≤ Bi ≤ 1,000,000,000). The GGG store has M (1 ≤ M ≤ 100,000) different types of grass available, each with a price Ci (1 ≤ Ci ≤ 1,000,000,000) and a greenness score of Di (1 ≤ Di ≤ 1,000,000,000). Of course, no cow would sacrifice her individuality, so no two cows can have the same kind of grass.

Help Farmer John satisfy the cows' expensive gourmet tastes while spending as little money as is necessary.

输入解释

* Line 1: Two space-separated integers: N and M.
* Lines 2..N+1: Line i+1 contains two space-separated integers: Ai and Bi
* Lines N+2..N+M+1: Line i+N+1 contains two space-separated integers: Ci and Di

输出解释

* Line 1: A single integer which is the minimum cost to satisfy all the cows. If that is not possible, output -1.

输入样例
4 7
1 1
2 3
1 4
4 2
3 2
2 1
4 3
5 2
5 4
2 6
4 4
输出样例
12

该题目是Virtual Judge题目,来自 北京大学POJ

源链接: POJ-3622

最后修改于 2020-10-29 07:06:18 UTC 由爬虫自动更新

共提交 0

通过率 --%
时间上限 内存上限
3000 65536

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