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

void chmax(double &a, double b) {if(a < b) a = b;}

int main() {
	int N, X, Y;
	cin >> N >> X >> Y;
	vector<int> W(N), V(N), C(N);
	for(int i = 0; i < N; ++i) cin >> W[i] >> V[i] >> C[i];
	
	vector<pair<int, double>> vec;
	for(int i = 0; i < N; ++i) {
		while(C[i] > 0) {
			do {
				vec.emplace_back(W[i], V[i]);
				C[i] -= 1;
			} while(C[i] % 2 == 1);
			W[i] *= 2, V[i] *= 2, C[i] /= 2;
		}
	}
	
	cout << fixed << setprecision(15);
	
	auto check = [&](double A) {
		vector<double> dp(X, -1e18);
		for(auto [w, v] : vec) {
			v -= w * A;
			v += w / X * Y;
			w %= X;
			
			auto ndp = dp;
			for(int i = 0; i < X; ++i) {
				int ni = i + w;
				chmax(ndp[ni % X], dp[i] + v + (ni < X ? 0 : Y));
			}
			chmax(ndp[w], v);
			swap(dp, ndp);
		}
		
		for(auto x : dp) if(x >= 0) return true;
		return false;
	};
	
	double ok = 0, ng = 1e6;
	for(int _ = 0; _ < 50; ++_) {
		double mid = (ok + ng) / 2;
		(check(mid) ? ok : ng) = mid;
	}
	
	cout << ok << "\n";
}