#include <iostream>
#include <vector>
#include <climits>
#include <algorithm>
#include <cmath>
#include <map>
#include <set>
#include <string>
#include <bitset>
#include <utility>
#include <numeric>
#include <queue>
#include <stack>

using ll = long long;
using namespace std;

constexpr int MOD = 1e9 + 7;
constexpr ll MOD_LL = ll(1e9) + 7;

int main(void) {
	double a, b, c, d;
	cin >> a >> b >> c >> d;
	
	double u = (a - c) / 2.0;
	double w = (b - d) / 2.0;	
	double x = u * u - 4.0 * w;

	if( x < 0.0 ) {
		cout << "No" << endl;
	} else if( x == 0.0 ) {
		cout << "Yes" << endl;
	} else {
		cout << "Yes" << endl;
		
		double p = (a + c) / 2.0;
		double q = (b + d) / 2.0;
		printf("%.12f %.12f\n", p, q);
	}
	
	return 0;
}