326. 3 的幂 
为保证权益,题目请参考 326. 3 的幂(From LeetCode).
解决方案1 
CPP 
C++
#include <iostream>
using namespace std;
class Solution {
public:
    static bool isPowerOfThree(int n) {
        return n > 0 && 1162261467%n == 0;
    }
};
int main() {
    int t;
    for (int i = 1; i < 30; i++) {
        t = pow(3, i);
        cout << "# " << i << ": " << t << endl;
    }
    return 0;
}1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19