#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> P;
#define DUMP(x) cout << #x << " = " << (x) << endl;
#define FOR(i, m, n) for (ll i = m; i < n; i++)
#define IFOR(i, m, n) for (ll i = n - 1; i >= m; i--)
#define REP(i, n) FOR(i, 0, n)
#define IREP(i, n) IFOR(i, 0, n)
#define FOREACH(x, a) for (auto&(x) : (a))
#define ALL(v) (v).begin(), (v).end()
#define SZ(x) ll(x.size())

void yes() {
  cout << "Yes" << endl;
  exit(0);
}

void no() {
  cout << "No" << endl;
  exit(0);
}

int main() {
  ll a, b, c, d;
  cin >> a >> b >> c >> d;
  ll D = (a - c) * (a - c) - 4 * 4 * (b - d);

  if (D < 0) {
    no();
  }
  if (D == 0) {
    yes();
  }

  double q = (b + d) / 2.0, p = (a + c) / 2.0;
  cout << fixed << setprecision(20) << p << " " << q << endl;
}