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答案

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def trim(s): while s[:1]==' ': s= s[1:] while s[-1:]==' ': s=s[:-1] return s

Edge_c

#2 Created at ... [Delete] [Delete and Lock User]

应该是这个最简单,顶上去

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NOD12

#4 Created at ... [Delete] [Delete and Lock User]

为什么我把while换成if就不行了


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