#include <bits/stdc++.h>
using namespace std;

int main() {
    int64_t a, b, c, d;
    cin >> a >> b >> c >> d;
    int64_t det = (a - c) * (a - c) - 8 * (b - d);
    if (det < 0) {
        cout << "No" << endl;
    } else if (det == 0) {
        cout << "Yes" << endl;
    } else {
        cout << 0.5 * (a + c) << " " << 0.5 * (b + d) << endl;
    }
}