#include <bits/stdc++.h>
#define REP(i, n) for(int i = 0; (i) < (n); (i)++)
using namespace std;

int main()
{   
    int a, b, c, d; cin >> a >> b >> c >> d;
    int D = (a-c)*(a-c) - 8 * (b-d);
    if(D<0) cout << "No" << endl;
    else if(D==0) cout << "Yes" << endl;
    else{
        cout << fixed;
        cout << setprecision(8) << (double)(a+c)/2.0 << " " << (double)(b+d)/2.0 << endl;
    }

    return 0;
}