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

int main() {
	long long A, B, C, D;
	cin >> A >> B >> C >> D;
	long long X = (A - C) * (A - C) - 8 * (B - D);
	if (X < 0) cout << "No" << endl;
	else if (X == 0) cout << "Yes" << endl;
	else {
		double S = A + C, T = B + D;
		printf("%.12lf %.12lf\n", S / 2, T / 2);
	}
}