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Topic: Discrete math with IMO.
Replies: 5   Last Post: Feb 2, 2013 4:51 AM

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Posts: 12,067
Registered: 7/15/05
Re: Discrete math with IMO.
Posted: Feb 2, 2013 3:43 AM
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William Elliot wrote:
>mina_world wrote:

>> Hello~ teacher...
>> 2n ambassadors are invited to a banquet.
>> Every ambassador has at most (n-1) enemies.

>> Prove that the ambassadors can be seated around a round table,
>> so that nobody sits next to an enemy.

>Let n = 2 and a,b,c all have the enemy d while d has no enemies.

Not acceptable.

For this problem, there is an implicit assumption that emnity is


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