Обсуждение @ 1276. Train @ Timus Online Judge

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Обсуждение задачи 1276. Train

vrandik tests [3] // Задача 1276. Train 1 сен 2004 00:05

What answer must be in this input???:
7 7
AA
AA
AB
AB
AB
BA
BA
BA

Grebnov Ilya[Ivanovo SPU] Re: tests [2] // Задача 1276. Train 1 сен 2004 01:47

YES
4

wwby Re: tests [1] // Задача 1276. Train 5 сен 2004 15:47

Why not
YES
6 ?
AAAAABBAABBAAB
ABBAAAAAABBAAB
ABBAABBAAAAAAB
AAABBAAAABBAAB
ABBAAAABBAAAAB
AAABBAABBAAAAB

ahyangyi_newid Re: tests // Задача 1276. Train 8 янв 2006 12:53

AA(the first one) is the locomotive , not BA(the last one).
And your answer made me puzzled for a long time! :(