Return true if an integer n is a power of four. Return false otherwise. If there exists an integer x such that n == 4^x, then n is a power of four. | JR Academy

Return true if an integer n is a power of four. Return false otherwise. If there exists an integer x such that n == 4^x, then n is a power of four.

难度: easy

标签: interviewbit, optum, company-specific

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