POJ1274_The Perfect Stall(二部图最大匹配)
解决报告
http://blog.csdn.net/juncoder/article/details/38136193
题意:
n头m个机器,求最大匹配。
ps
一分钟前刚做了POJ1469直接改了输入输出就交了,题意全然一样,,,sad ,代码传送门
Time Limit: 1000MS | Memory Limit: 10000K | |
Total Submissions: 18108 | Accepted: 8227 |
Description
it quickly became clear that any given cow was only willing to produce milk in certain stalls. For the last week, Farmer John has been collecting data on which cows are willing to produce milk in which stalls. A stall may be only assigned to one cow, and,
of course, a cow may be only assigned to one stall.
Given the preferences of the cows, compute the maximum number of milk-producing assignments of cows to stalls that is possible.
Input
to a single cow. The first integer (Si) on the line is the number of stalls that the cow is willing to produce milk in (0 <= Si <= M). The subsequent Si integers on that line are the stalls in which that cow is willing to produce milk. The stall numbers will
be integers in the range (1..M), and no stall will be listed twice for a given cow.
Output
Sample Input
5 5
2 2 5
3 2 3 4
2 1 5
3 1 2 5
1 2
Sample Output
4
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