#include <bits/stdc++.h>

using namespace std;

using ll = long long;

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    ll a, b, c, d;
    cin >> a >> b >> c >> d;

    string res;
    ll x0 = (a - c) * (a - c) - 8 * (b - d);
    if (x0 == 0)
        cout << "Yes\n";
    else if (x0 < 0)
        cout << "No\n";
    else
    {
        double p = (a + c) / 2.0;
        double q = (b + d) / 2.0;

        cout << fixed << setprecision(10) << p << " " << q << "\n";
    }

    return 0;
}