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

//template
#define rep(i,a,b) for(int i=(int)(a);i<(int)(b);i++)
#define ALL(v) (v).begin(),(v).end()
typedef long long int ll;
const int inf = 0x3fffffff; const ll INF = 0x1fffffffffffffff; const double eps=1e-12;
template<typename T>inline bool chmax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
template<typename T>inline bool chmin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
//end



int main(){
   ll a,b,c,d; cin>>a>>b>>c>>d;
   ll g=(a-c)*(a-c)-8*(b-d);
   if(g<0)puts("No");
   else if(g==0)puts("Yes");
   else{
      double x=(a+c)/2.0,y=(b+d)/2.0;
      printf("%.12f %.12f\n",x,y);
   } 
   return 0;
}