For a stack, a known sequence of elements into the stack to determine a stack with all the elements of the composition of whether it is possible to sequence the stack. For example, the stack into the sequence 1 2 3 4, you may stack the sequence of the 4 3 2 1,1 4 3 2 and so on. And 1 4 2 3 is not.

outstack.c
pudn.txt

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