leetcode Power of Three
leetcode Power of Three 題目:https://leetcode.com/problems/power-of-three/
解題思路:不斷除以3如果等於1,是3的冪次方,如果不是,不是3的冪次方。
public boolean isPowerOfThree(int n) {
if(n==0){
return false;
}
while(n%3==0){
n=n/3;
}
if(n==1){
return true;
}
return false;
}
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