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Discussion of Problem 1303. Minimal Coverage

I have some questions....
Posted by hello 21 May 2004 17:32
This is a test :
6
-1 3
2 4
3 5
4 7
0 0
What is the correct answer for this test ?

Edited by author 21.05.2004 17:36
Re: I have some questions....
Posted by SK1 21 May 2004 20:45
Answer:
3
-1 3
3 5
4 7
Re: I have some questions....
Posted by alp 7 Apr 2014 21:15
or
3
-1 3
2 4
4 7