PowerOfThree.java 源码
package datastructure.array.leetcode;
/**
* 3的幂次方
*/
public class PowerOfThree {
/**
* 迭代法
*/
public boolean isPowerOfThree(int n) {
while (n >= 3) {
if (n % 3 != 0) {
return false;
}
n /= 3;
}
return n == 1;
}
}