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高手帮忙,谢谢对于入栈顺序为1，2，3……n的序列，其出栈序列共C(n+1)种。现规定，第一个出栈元素必须是m，那么有多少种出栈情况？ ps:C(n+1)= 1/(n+1)C(2n,n) Followed by: Post your reply here: |
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