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1067 - Tunnels

Posted: Sun Jul 01, 2012 10:50 am
by sith
Hello
Could anybody explaine, why the answer for case
4 6
1 2
1 3
1 4
2 0
3 0
4 0
is 2

Re: 1067 - Tunnels

Posted: Fri Apr 03, 2015 1:50 pm
by Reza_H
Lets the spy goes to each of 1,2 or 3 and then block outgoing edge from current position of spy.