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| 1 2 3 4 5 6 7 8 9 10 | 4x 1x 3x 7x 3x | export default function isPowerOfThree(n: number): boolean {
if (n < 1)
return false
while (n % 3 === 0)
n = Math.floor(n / 3)
return n === 1
}
|