LeetCode/Java/326.java at master · strengthen/LeetCode · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
__________________________________________________________________________________________________
sample 10 ms submission
class Solution {
    public boolean isPowerOfThree(int n) {
        return ( n>0 &&  1162261467%n==0);
    }
}
__________________________________________________________________________________________________
sample 34036 kb submission
class Solution {
    public boolean isPowerOfThree(int n) {
        //if(n<3) return false;

        while(n>1){
            if(n%3!=0) return false;

            n=n/3;
        }

        if(n==1) return true;

        return false;
    }
}
__________________________________________________________________________________________________