#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, s, e) for (int i = (int)s; i < (int)e; ++i)
#define all(a) (a).begin(), (a).end()

int main() {
    cin.tie(nullptr);
    
    ll a, b, c, d;
    cin >> a >> b >> c >> d;
    
    ll D = (a - c)*(a - c) -  8 * (b - d);
    
    if (D < 0) cout << "No\n";
    else if (D == 0) cout << "Yes\n";
    else {
        cout << fixed << setprecision(15);
        
        double p = ((double)a + (double)c) / 2;
        double q = ((double)b + (double)d) / 2;
        
        cout << p << ' ' << q << '\n';
    }
}