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

#define ll long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define P pair<int, int>

int main() {
  double a, b, c, d;
  cin >> a >> b >> c >> d;
  double D = (a-c)*(a-c) - 8*(b-d);

  if (D > 0) {
    cout << (a+c)/2 << " " << (b+d)/2 << endl;
  } else if (D == 0) {
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }




}