Nộp bài  Các bài nộp  Làm tốt nhất  Về danh sách bài 
MPART  Group Partition 
English  Vietnamese 
Jamie is a very popular girl and has quite a lot of friends, so she always keeps a very long contact list in her cell phone. The lontact list has become so long that it often takes a long time for her to browse through the whole list to find a friend’s number.
As Jamie’s best friend and a programming genius, you suggest that she group the contact list and minimize the size of the largest group, so that it will be easier for her to search for a friend’s number among the groups. Jamie takes your advice and gives you her entire contact list containing her friends’ names, the number of groups she wishes to have and what groups every friend could belong to.
Your task is to write a program that takes the list and organizes it into groups such that each friend appears in only one of those groups and the size of the largest group is minimized.
Input
There will be at most 20 test cases. Ease case starts with a line containing two integers N and M. where N is the length of the contact list and M is the number of groups.
N lines then follow. Each line contains a friend’s name and the groups the friend could belong to. You can assume N is no more than 1000 and M is no more than 500. The names will contain alphabet letters only and will be no longer than 15 characters. No two friends have the same name. The group label is an integer between 0 and M1.
After the last test case, there is a single line “0 0” that terminates the input.
Sample Input3 2 John 0 1 Rose 1 Mary 1 5 4 ACM 1 2 3 ICPC 0 1 Asian 0 2 3 Regional 1 2 ShangHai 0 2 0 0
Output
For each test case, output a line containing a single integer, the size of the largest contact group.
Sample output2 2Note : Huge data input
Được gửi lên bởi:  psetter 
Ngày:  20090222 
Thời gian chạy:  1s6.752s 
Giới hạn mã nguồn:  50000B 
Memory limit:  1536MB 
Cluster:  Cube (Intel G860) 
Ngôn ngữ cho phép:  Tất cả ngoại trừ: ERL GOSU JSRHINO NODEJS PERL6 PYPY RUST SED VB.NET 
Nguồn bài:  Shanghai 2004 
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20150919 08:45:21 Nguyá»…n Viá»‡t Tháº¯ng
làm luồng bình thường vẫn AC đc. 

20090319 23:33:41 ~!(*(@*!@^&
Rejudge lai cho RR: test 1  WA (score=0.000000, sig=0, time=100.160000, mem=32896) 

20090319 23:33:26 ~!(*(@*!@^&
Muon AC bang luong <5s thi phai cai Dinic algorithm. Last edit: 20090319 23:33:26 