POJ2505 A multiplication game(博弈)

#include<cstdio>
#define LL long long 
using namespace std;
int main() {
    double n;
    while(scanf("%lf", &n) != EOF) {
        while(n > 18) n = n / 18;
        if(n <= 9) puts("Stan wins.");
        else puts("Ollie wins.");        
    }
    return 0;
}