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There are six inter-linked rooms - A through F. A person can enter either from A or from B
only and he can exit only from F. The different one way routes are D to B, E to F, C to F and C
to D, and different two way routes are in between A and B, A and C, D and F, B and F.
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Question
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How many possible ways are there, for a person, who enters from either A or B and crosses
all the rooms without going to a room more than once, to exit?
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Answer:
jzjzjzjzjzzj sbzjzjzjzjzjzuzuzuzuuzzuuzuzuzuzjzjz z z z z. z zz
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