#include <bits/stdc++.h> #include <iomanip> using namespace std; #define reps(i,s,n) for(int i = s; i < n; i++) #define rep(i,n) reps(i,0,n) #define Rreps(i,n,e) for(int i = n - 1; i >= e; --i) #define Rrep(i,n) Rreps(i,n,0) #define ALL(a) a.begin(), a.end() #define fi first #define se second typedef long long ll; typedef vector<ll> vec; typedef vector<vec> mat; ll N,M,H,W,Q,K,A,B; string S; const ll MOD = 998244353; //const ll MOD = (1e+9) + 7; typedef pair<ll, ll> P; const ll INF = (1LL<<62); int main() { ll a, b, c, d; cin>>a>>b>>c>>d; ll ju = (a - c) * (a - c) - 8LL * (b - d); if(ju <= 0){ cout<<(ju == 0 ? "Yes" : "No")<<endl; }else{ long double p = a + c, q = b + d; p /= 2; q /= 2; cout<<fixed<<setprecision(10)<<p<<' '<<q<<endl; } }