#include <cstdio>
#include <cstring>
#include <iostream>
#include <string>
#include <cmath>
#include <bitset>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <algorithm>
#include <complex>
#include <unordered_map>
#include <unordered_set>
#include <random>
#include <cassert>
#include <fstream>
#include <utility>
#include <functional>
#include <time.h>
#include <stack>
#include <array>
#define popcount __builtin_popcount
using namespace std;
typedef long long int ll;
typedef pair<int, int> P;

int main()
{
	ll a, b, c, d; cin>>a>>b>>c>>d;
	ll 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, q=(b+d)/2.0;
		printf("%.12lf %.12lf\n", p, q);
	}
	return 0;
}