#include <bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) begin(v),end(v)
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }
using ll = long long;
using pii = pair<int, int>;
constexpr ll INF = 1ll<<30;
constexpr ll longINF = 1ll<<60;
constexpr ll MOD = 1000000007;
constexpr bool debug = false;
//---------------------------------//

int main() {
	int A, B, C, D;
	cin >> A >> B >> C >> D;
	const int a = 2, b = A - C, c = B - D;
	
	const ll desc = (ll)b * b - 4ll * a * c;
	if (desc < 0) puts("No");
	else if (desc == 0) puts("Yes");
	else {
		double x1 = (-b + sqrt(desc)) / (2 * a);
		double x2 = (-b - sqrt(desc)) / (2 * a);
		
		auto func = [&](double x) {
			return (x + A) * x + B;
		};
		double y1 = func(x1);
		double y2 = func(x2);
		
		double p = (y2 - y1) / (x2 - x1);
		double q = y1 - p * x1;
		printf("%.16f, %.16f\n", p, q);
	}
}