剑指offer 11 数值的整数次方 | 碎碎念



剑指offer 11 数值的整数次方 | 碎碎念

时间复杂度是O(n)。当然这种思路并不高效，做了很多重复工作。比如a^32完全可以由a^16平方得到，a^16可以由a^8平方得到，以此类推直到a^1；而奇数情况下则只需要再乘一次a即可。而由这个思路则可以得到如下打码：


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