#include <bits/stdc++.h>

using namespace std;

using ll = long long;

constexpr char newl = '\n';

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

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

    ll foo = a - c, bar = b - d;
    ll hoge = foo * foo - 8 * bar;
    if (hoge < 0) {
        cout << "No\n";
    } else if (hoge == 0) {
        cout << "Yes\n";
    } else {
        double p = (a + c) / 2.0;
        double q = (b + d) / 2.0;
        cout << fixed << setprecision(15) << p << " " << q << newl;
    }

    return 0;
}