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#include "leetcode.h"
class Solution {
public:
bool isPowerOfFour(int num) {
if (num < 0)
return false;
int ans = 0, pos = 1, ones = 0;
while (num) {
if (num & 1)
ans += 1, ones = pos;
num >>= 1, pos += 1;
}
return ans == 1 && ones & 1;
}
};
int main() {
Solution obj;
if (obj.isPowerOfFour(16))
cout << "true";
else
cout << "false";
}
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