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You are playing the following Nim Game with your friend: There is a heap of stones on the table, each time one of you take turns to remove 1 to 3 ston 阅读全文
posted @ 2018-03-11 21:54
bonelee
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Given a positive integer, check whether it has alternating bits: namely, if two adjacent bits will always have different values. Example 1: Input: 5 O 阅读全文
posted @ 2018-03-11 21:14
bonelee
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Given a group of two strings, you need to find the longest uncommon subsequence of this group of two strings. The longest uncommon subsequence is defi 阅读全文
posted @ 2018-03-11 20:32
bonelee
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高级语法 除了像上面介绍的 [x ** 2 for x in L] 这种基本语法之外，列表推导式还有一些高级的扩展。 4.1. 带有if语句 我们可以在 for 语句后面跟上一个 if 判断语句，用于过滤掉那些不满足条件的结果项。 例如，我想去除列表中所有的偶数项，保留奇数项，可以这么写： >>> 阅读全文
posted @ 2018-03-11 18:33
bonelee
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Given a non-empty binary tree, return the average value of the nodes on each level in the form of an array. Example 1: Note: 解法1: 精简版： 解法2: DFS 使用一个数组 阅读全文
posted @ 2018-03-11 17:49
bonelee
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