#include <bits/stdc++.h>
using namespace std;

const int MXN = 25;
const double T = 100;
const double EPS = 1e-13;
const double RATE = 0.99;
const double PI = acos(-1);
int N, len[MXN], tx, ty;
double tlen, angle[MXN], ans[MXN], dans[MXN], dlen;

inline double cald(double x, double y) {
  return sqrt(x * x + y * y);
}
inline pair<double, double> conv(double l, double theta) {
  return make_pair(l * cos(theta), l * sin(theta));
}
inline double random(mt19937& rnd) {
  return rnd() * 2.0 / UINT32_MAX - 1;
}
pair<double, double> calc(bool output_mode = false) {
  double x(0), y(0), a(0);
  for (int i(0); i != N; ++i) {
    a = angle[i];
    pair<double, double> vec(conv(len[i], a));
    x += vec.first, y += vec.second;
    if (output_mode)
      cout << setprecision(6) << fixed << x
           << ' ' << setprecision(6) << fixed << y << endl;
  }
  return make_pair(x, y);
}

int main() {
  cin >> N;
  for (int i(0); i != N; ++i) cin >> len[i];
  cin >> tx >> ty;
  tlen = cald(tx, ty);
  mt19937 rnd((random_device())());
  double dlen(cald(calc().first, calc().second));
  while (clock() * 1.0 / CLOCKS_PER_SEC < 0.9) {
    pair<double, double> vec(calc());
    double nlen(cald(vec.first, vec.second));
    for (double temp(T); temp > EPS; temp *= RATE) {
      for (int i(1); i != N; ++i)
        angle[i] = ans[i] + random(rnd) * temp / 100 * 2 * PI;
      vec = calc();
      double clen(cald(vec.first, vec.second));
      if (abs(clen - tlen) < abs(nlen - tlen) ||
          rnd() < exp((abs(nlen - tlen) - abs(clen - tlen)) * 10000 / temp)) {
        for (int i(0); i != N; ++i) ans[i] = angle[i];
        nlen = clen;
      }
      if (abs(clen - tlen) < abs(dlen - tlen)) {
        for (int i(0); i != N; ++i) dans[i] = angle[i];
        dlen = clen;
      }
    }
  }
  for (int i(0); i != N; ++i) angle[i] = dans[i];
  pair<double, double> cur(calc());
  if (tlen) angle[0] = atan2(ty, tx) - atan2(cur.second, cur.first);
  else angle[0] = 0;
  for (int i(1); i != N; ++i) angle[i] += angle[0];
  calc(1);
  return 0;
}