#include<bits/stdc++.h>

using namespace std;
using ll = long long int;
using lc = complex<double>;

int main(void) {
    constexpr ll MOD = 1e9 + 7;
    constexpr double PI = acos(-1);
    cout << fixed << setprecision(32);
    cin.tie(0); ios::sync_with_stdio(false);

    ll a, b, c, d;
    cin >> a >> b >> c >> d;
    ll D = (a-c)*(a-c) - 4 * 2 * (b - d);
    if(D == 0)
        cout << "Yes" << endl;
    else if (D < 0)
        cout << "No" << endl;
    else
        cout << (a+c)*0.5 << ' ' << (b+d)*0.5 << endl;
}