#include using namespace std; struct iofast_t { iofast_t() { ios::sync_with_stdio(false); cin.tie(nullptr); } } iofast; struct uns_t {} uns; template auto vec(Element init, Head arg, Args ...args) { if constexpr (sizeof...(Args) == 0) return vector(arg, init); else return vector(arg, vec(init, args...)); } template auto vec(uns_t, Head arg, Args ...args) { return vec(Element(), arg, args...); } template auto distance(const Container &c, decltype(begin(c)) iter) { return distance(begin(c), iter); } template ::value_type>> auto isort(RIter first, RIter last, Compare comp = Compare()) { vector i(distance(first, last)); iota(begin(i), end(i), 0); sort(begin(i), end(i), [&](auto x, auto y) { return comp(*(first + x), *(first + y)); }); return i; } template typename, typename = void_t<>> struct detect : false_type {}; template typename Check> struct detect>> : true_type {}; template typename Check> constexpr inline bool detect_v = detect::value; template using has_member_sort = decltype(declval().sort()); template > auto sorted(Container c, Compare comp = Compare()) { if constexpr (detect_v) { c.sort(comp); return c; } else { sort(begin(c), end(c), comp); return c; } } template > auto uniqued(Container c, Compare comp = Compare()) { c.erase(unique(begin(c), end(c), comp), end(c)); return c; } template > T &chmin(T &l, T r, Compare &&f = less()) { return l = min(l, r, f); } template > T &chmax(T &l, T r, Compare &&f = less()) { return l = max(l, r, f); } template constexpr auto fix(F &&f) noexcept { return [f = std::tuple(std::forward(f))](auto &&...args) mutable { return std::get<0>(f)(fix(std::get<0>(f)), std::forward(args)...); }; } constexpr auto lim = 6; using tmat = array, 1 << lim>; using vmat = array, 1 << lim>; template using mmat = array::value>, tuple_size::value>; constexpr tmat tstep = []() { tmat mat = {}; for (int i = 0; i < (1 << lim); ++i) { for (int j = 0; j < lim; ++j) { if (i & (1 << j)) { ++mat[i][i]; mat[i][i ^ (1 << j)] = 1; } } } for (auto &_ : mat) { for (auto &e : _) { e /= 6; } } return mat; }(); int main() { int n; cin >> n; auto mmul = [&](auto x, auto y) { mmat m = {}; for (int i = 0; i < size(x); ++i) { for (int j = 0; j < size(y[0]); ++j) { for (int k = 0; k < size(x[0]); ++k) { m[i][j] += x[i][k] * y[k][j]; } } } return m; }; auto mpow = [&](auto init, auto mat, int n) { auto acc = init; while (0 < n) { if (n & 1) { acc = mmul(acc, mat); } mat = mmul(mat, mat); n >>= 1; } return acc; }; auto trans = mpow(tstep, tstep, n - 1); vmat v = {}; v[0][0] = 1; cout << fixed << setprecision(15) << mmul(trans, v)[(1 << lim) - 1][0] << endl; }