#include <iostream>
#include <iomanip>
using namespace std;
int main(){
    long long a,b,c,d;cin>>a>>b>>c>>d;
    if((a-c)*(a-c)-4*(b-d) < 0){
        cout << "No" << endl;
    }else if((a-c)*(a-c)-4*(b-d) == 0){
        cout << "Yes" << endl;
    }else{
        cout << fixed << setprecision(10) << (double)(a+c)/2 << " " << (double)(b+d)/2 << endl;
    }
}