当前你的浏览器版本过低,网站已在兼容模式下运行,兼容模式仅提供最小功能支持,网站样式可能显示不正常。
请尽快升级浏览器以体验网站在线编辑、在线运行等功能。

建议使用的浏览器:

谷歌Chrome 火狐Firefox Opera浏览器 微软Edge浏览器 QQ浏览器 360浏览器 傲游浏览器

4129:Porcelain Exhibitions

题目描述
Recently, the Chinese government is going to hold a porcelain exhibition in every province.
For fascinating citizens, each exhibition should put at least MIN_K porcelains on show. And by the restriction of conditions, at most MAX_K porcelains can be shown in an exhibition.

The number of porcelains in a province is in direct proportion to the area of that province. So some small provinces may don't have enough porcelains, and some big provinces may have more porcelains than it can show(having too much porcelains is not a problem for holding an exhibition, just don’t show some of them). The government decides to transport some porcelains between provinces so that every province can hold an exhibition.

Because of the limitation of traffic, the amount of porcelains passing a boundary between two provinces is limited. So the government asks you to write a program to manage the transportation.

The map of China can be seen as a connected planar graph embedded on a plane. Each face of the graph represents a province. This graph has N vertices and M edges. A vertex of the graph is also a point on the map, and an edge is also a line segment connecting two points, meaning a boundary between two provinces.
输入解释
The input will consist of multiply test cases. For each case, The first line contains five positive integers --- above mentioned N, M, MIN_K,MAX_K and P( N <= 1000,M <= 10000, MIN_K < MAX_K) . P means that if the area of a province is A, then there are A×P porcelains in that province. P is guaranteed to be even so that the amount of porcelains in each province will be a positive integer.

The next N lines, each gives two integer x, y, representing the coordinate of a vertex(Vertexes have distinct coordinates). The vertexes are numbered from 0 to N-1 and the coordinates are given in the order of vertex No.

The next M lines, each gives three integers u,v, and w. It means that there is an edge connecting vertex u and vertex v. The edge is also a boundary between two provinces. w means that the boundary can’t let more than w porcelains to pass through. (w for the boundary of China is 0, and boundaries don't overlap). The number of province is less than 2000.
Unsigned int is enough for this problem. The input ends with 0 0 0 0 0.
输出解释
For each test case, print one integer in a line representing the maximal number of porcelains can be exhibited in whole country. If one or more province can’t hold an exhibition, print -1.
输入样例
8 9 5 8 2
0 0
0 3
3 3
3 0
1 1
1 2
2 2
2 1
0 1 0
1 2 0
2 3 0
3 0 0
4 5 1
5 6 1
6 7 1
7 4 1
0 4 1
8 9 7 8 2
0 0
0 3
3 3
3 0
1 1
1 2
2 2
2 1
0 1 0
1 2 0
2 3 0
3 0 0
4 5 1
5 6 1
6 7 1
7 4 1
0 4 1
0 0 0 0 0
输出样例
14
-1
来自杭电HDUOJ的附加信息
Recommend lcy

该题目是Virtual Judge题目,来自 杭电HDUOJ

源链接: HDU-4129

最后修改于 2020-10-25T23:10:32+00:00 由爬虫自动更新

共提交 0

通过率 --%
时间上限 内存上限
5000/2000MS(Java/Others) 32768/32768K(Java/Others)