265 - Dining Diplomats

[b821213]

I just keep getting RE in this problem. Are there any special case in the problem?

I consider that nine countries are all different.And all names of the countries are given in only three letters.

If two countries have relation and common language, there is two edges, A->B and B->A.

Then just find whether there is a circle that involves all the country.

Thanks

[b821213]

Sorry , but I get WA now.

I found that there may be two or more diplomats from the same country.

But , I still can't understand why I get WA.

Can anyone offer some test case?

[b821213]

Got AC.....

Notice that there may be spaces after each lines = ="
And there may be more than ten names of countries appearing in the test data.