#include <bits/stdc++.h>

using namespace std;

#define REP(i,n) for(int i=0; i<(int)(n); i++)
#define FOR(i,b,e) for (int i=(int)(b); i<(int)(e); i++)
#define ALL(x) (x).begin(), (x).end()

const double PI = acos(-1);

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);

  long long a, b, c, d;
  cin >> a >> b >> c >> d;

  long long D = (a - c) * (a - c) - 8 * (b - d);
  if (D < 0)
    cout << "No" << endl;
  else if (D == 0)
    cout << "Yes" << endl;
  else {
    double p = (a + c) / 2.0;
    double q = (b + d) / 2.0;
    cout << fixed << setprecision(15) << p << " " << q << endl;
  }
  
  return 0;
}