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

#ifdef LOCAL
#include "debug.h"
#else
#define DEBUG(...)
#endif

int main() {
  cin.tie(nullptr);
  ios::sync_with_stdio(false);
  cout << fixed << setprecision(20);
  double a, b, c, d;
  cin >> a >> b >> c >> d;
  double dd = (a - c) * (a - c) - 8 * (b - d);
  if (dd < -1e-10) {
    cout << "No\n";
  } else if (dd < 1e-10) {
    cout << "Yes\n";
  } else {
    cout << (a + c) / 2 << ' ' << (b + d) / 2 << '\n';
  }
}