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v0.0.0-...-a49be92
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Published: Feb 20, 2024
License: MIT
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README
¶
3的幂
给定一个整数,写一个函数来判断它是否是 3 的幂次方。如果是,返回 true
;否则,返回 false
。
整数 n
是 3 的幂次方需满足:存在整数 x
使得 n == 3x
示例 1:
输入:n = 27
输出:true
示例 2:
输入:n = 0
输出:false
示例 3:
输入:n = 9
输出:true
示例 4:
输入:n = 45
输出:false
提示:
进阶:
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