#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <iomanip>
#include <cmath>
#include <stdio.h>
#include <queue>
#include <deque>
#include <cstdio>
#include <set>
#include <map>
#include <bitset>
#include <stack>
#include <cctype>
using namespace std;
int main() {
	long double a, b, c, d;
	cin >> a >> b >> c >> d;
	if (a == b && c == d) {
		cout << "Yes" << endl;
	}
	else if (a < c || b < d) {
		cout << fixed << setprecision(16) << (a + c) / 2 << " " << (b + d) / 2 << endl;
	}
	else {
		cout << "No" << endl;
	}
}