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摘要： enumerate 函数用于遍历序列中的元素以及它们的下标：>>> for i,j in enumerate(('a','b','c')):print i,j0 a1 b2 c>>> for i,j in enumerate([1,2,3]):print i,j0 11 22 3>>> for i,... 阅读全文

摘要： 标题：Gray Code通过率：32.4%难度：中等The gray code is a binary numeral system where two successive values differ in only one bit.Given a non-negative integernrep... 阅读全文