#include #include using ldouble = long double; const ldouble PI = std::acos(-1.L); void solve() { int n; std::cin >> n; std::cout << std::lround(std::floor(std::pow(6 / PI, n) / n)) << "\n"; } int main() { std::cin.tie(nullptr); std::ios::sync_with_stdio(false); solve(); return 0; }