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Discussion of Problem 1182. Team Them Up!

I have a test and an AC (greedy) program, that gives WA on my test
Posted by vnikulin 28 Oct 2005 18:57
Sorry, the test is not small. Now I will give a description of the test. There 5 groups with sizes: (6 1) (5 1) (4 1) (4 1) (4 1). The right answer for this test is 14:14. But the greedy program gives 15:13. I think moderators shall add this test to the test data and many solutions will be rejected.

28
21 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 0
26 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 0
26 2 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 0
26 2 3 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 0
26 2 3 4 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 0
26 2 3 4 5 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 0
26 2 3 4 5 6 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 0
22 1 2 3 4 5 6 7 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 0
26 1 2 3 4 5 6 7 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 0
26 1 2 3 4 5 6 7 9 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 0
26 1 2 3 4 5 6 7 9 10 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 0
26 1 2 3 4 5 6 7 9 10 11 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 0
26 1 2 3 4 5 6 7 9 10 11 12 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 0
23 1 2 3 4 5 6 7 8 9 10 11 12 13 19 20 21 22 23 24 25 26 27 28 0
26 1 2 3 4 5 6 7 8 9 10 11 12 13 16 17 18 19 20 21 22 23 24 25 26 27 28 0
26 1 2 3 4 5 6 7 8 9 10 11 12 13 15 17 18 19 20 21 22 23 24 25 26 27 28 0
26 1 2 3 4 5 6 7 8 9 10 11 12 13 15 16 18 19 20 21 22 23 24 25 26 27 28 0
26 1 2 3 4 5 6 7 8 9 10 11 12 13 15 16 17 19 20 21 22 23 24 25 26 27 28 0
23 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 24 25 26 27 28 0
26 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 21 22 23 24 25 26 27 28 0
26 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 20 22 23 24 25 26 27 28 0
26 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 20 21 23 24 25 26 27 28 0
26 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 20 21 22 24 25 26 27 28 0
23 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 0
26 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 26 27 28 0
26 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 25 27 28 0
26 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 25 26 28 0
26 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 25 26 27 0
Re: I have a test and an AC (greedy) program, that gives WA on my test
Posted by vnikulin 30 Oct 2005 17:11
up
Re: I have a test and an AC (greedy) program, that gives WA on my test
Posted by vnikulin 12 Nov 2005 18:28
 Do judges want to break greedy wrong solutions? Or it is OK that they are accepted?
 It is strange, that NEERC problem has poor set of tests.
Testset won't be altered (-)
Posted by Vladimir Yakovlev (USU) 13 Nov 2005 00:38
Re: I have a test and an AC (greedy) program, that gives WA on my test
Posted by lallala 19 Feb 2016 19:37
DO NOT MISLEAD OTHERS WITH YOUR WRONG SAMPLE!!!
MY AC program says NO SOLUTION!
take care of the following nodes
1st group: 1 8 14 19 24! 26
2nd group: 2 3 4 5 6 7 9 10 11 12 13 15 16 17 18 20 21 22 23 24! 25 27 28

when you start deducting from 24 to other non connected with 24 nodes and so on, you will get a contradiction.
Re: I have a test and an AC (greedy) program, that gives WA on my test
Posted by Mortus 22 Aug 2023 20:06
My AC prog says

14 24 19 14 9 10 11 12 13 2 3 4 5 6 7
14 1 8 15 16 17 18 20 21 22 23 25 26 27 28

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