GHOSTS - Ghosts having fun
Ghost are living in big castle with K rooms.
As they have around few hundred years and very tired, they decided to buy teleports. Every teleport can work only in one way (to prevent collision). Ghosts have decided which teleports they want to build and in which order they should be built.
King of ghosts, Bob, asked you to check list of teleports and decide which of them do not build. He don't want ghosts having fun in infinite ride with teleports.
Input
In first line - number K <= 1000, number of rooms in castle.
In next line - number T <= 300000 number of teleports.
In next T lines a, b <= K
Rooms are numbered 1 to K
Output
Print teleports which should not be built. End test case with 0 0.
Example
Input: 4 5 2 4 4 3 3 2 1 2 3 1 Output: 3 2 3 1 0 0
hide comments
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Kushagra Juneja:
2015-07-07 20:36:27
What happens if we print all the edges ? Still there would be no infinite loops in the graph ..... |
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jkelava6:
2015-03-10 19:11:15
OK, it seems that after ages I see a bug in my code.
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AlphaDecay:
2015-02-07 00:11:00
Loved It! |
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jkelava6:
2014-07-01 13:35:32
Well, if I am right ( I am still coding ), there is small trick... But as I see some people are asking, you have to output teleports in the same order you input them, just with 99% you output less.
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ksquare:
2014-03-02 11:19:30
Getting WA from a very long time. Can you please check my solution id 11167565 or provide me a testcase. |
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aristofanis:
2014-02-14 18:09:31
A small but yet important observation can help you solve the problem... |
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Mitch Schwartz:
2014-02-14 07:12:13
@Rishav: Print the edges in the same order as they appear in the input. |
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Rishav Goyal:
2014-02-14 06:39:14
problem statement is indeed not clear!! alot of ambiguities. Also its not clear the order of printing edges matters or not i.e. instead of
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Ravi Kiran:
2013-12-28 22:15:10
Nice observation needed! :-)
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Mitch Schwartz:
2013-09-23 13:20:50
@#include, for the input
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| Added by: | Krzysztof Lewko |
| Date: | 2011-08-25 |
| Time limit: | 1s |
| Source limit: | 50000B |
| Memory limit: | 1536MB |
| Cluster: | Cube (Intel G860) |
| Languages: | All except: ASM64 |
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