/**
 *    author:  tourist
 *    created: 05.10.2019 15:32:39       
**/
#include <bits/stdc++.h>

using namespace std;

template <typename A, typename B>
string to_string(pair<A, B> p);

template <typename A, typename B, typename C>
string to_string(tuple<A, B, C> p);

template <typename A, typename B, typename C, typename D>
string to_string(tuple<A, B, C, D> p);

string to_string(const string& s) {
  return '"' + s + '"';
}

string to_string(const char* s) {
  return to_string((string) s);
}

string to_string(bool b) {
  return (b ? "true" : "false");
}

string to_string(vector<bool> v) {
  bool first = true;
  string res = "{";
  for (int i = 0; i < static_cast<int>(v.size()); i++) {
    if (!first) {
      res += ", ";
    }
    first = false;
    res += to_string(v[i]);
  }
  res += "}";
  return res;
}

template <size_t N>
string to_string(bitset<N> v) {
  string res = "";
  for (size_t i = 0; i < N; i++) {
    res += static_cast<char>('0' + v[i]);
  }
  return res;
}

template <typename A>
string to_string(A v) {
  bool first = true;
  string res = "{";
  for (const auto &x : v) {
    if (!first) {
      res += ", ";
    }
    first = false;
    res += to_string(x);
  }
  res += "}";
  return res;
}

template <typename A, typename B>
string to_string(pair<A, B> p) {
  return "(" + to_string(p.first) + ", " + to_string(p.second) + ")";
}

template <typename A, typename B, typename C>
string to_string(tuple<A, B, C> p) {
  return "(" + to_string(get<0>(p)) + ", " + to_string(get<1>(p)) + ", " + to_string(get<2>(p)) + ")";
}

template <typename A, typename B, typename C, typename D>
string to_string(tuple<A, B, C, D> p) {
  return "(" + to_string(get<0>(p)) + ", " + to_string(get<1>(p)) + ", " + to_string(get<2>(p)) + ", " + to_string(get<3>(p)) + ")";
}

void debug_out() { cerr << endl; }

template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
  cerr << " " << to_string(H);
  debug_out(T...);
}

#ifdef LOCAL
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif

const double pi = acos(-1.0);

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, L;
  cin >> n >> L;
  vector<double> ang(n), x(n), y(n);
  for (int i = 0; i < n; i++) {
    int foo;
    cin >> foo;
    ang[i] = 2 * pi * foo / L;
    x[i] = cos(ang[i]);
    y[i] = sin(ang[i]);
  }
  double sx = 0.0, sy = 0.0;
  for (int i = 0; i < n; i++) {
    double tx = 0, ty = 0;
    for (int j = i + 2; j < n; j++) {
      tx += cos(ang[j - 1] * 0.5);
      ty += sin(ang[j - 1] * 0.5);
      double sumx = tx;
      double sumy = ty;
      sumx /= (j - i - 1);
      sumy /= (j - i - 1);
      double cx = cos(0.5 * (ang[i] + ang[j]) + pi);
      double cy = sin(0.5 * (ang[i] + ang[j]) + pi);
      double r = sqrt((cx - x[i]) * (cx - x[i]) + (cy - y[i]) * (cy - y[i]));
      double polar = atan2(y[i] - cy, x[i] - cx);
      double sumang = atan2(sumy, sumx);
      double realang = polar + (sumang - ang[i] * 0.5);
      r *= sqrt(sumx * sumx + sumy * sumy);
      sx += (j - i - 1) * (cx + r * cos(realang));
      sy += (j - i - 1) * (cy + r * sin(realang));
    }
  }
  sx /= n * (n - 1LL) * (n - 2) / 6;
  sy /= n * (n - 1LL) * (n - 2) / 6;
  cout << fixed << setprecision(17) << sx << " " << sy << '\n';
  return 0;
}


Measured memory_bytes: 768