#include<bits/stdc++.h>
#define all(x) begin(x),end(x)

using namespace std;
using ld = long double;

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);
	ld n, s;
	cin >> n >> s;
	ld ans = 0;
	vector<pair<ld,ld>> arr;
	for (int i = 0; i < n; i++) {
		ld a, b, c;
		cin >> a >> b >> c;
		if (c > 0) {
			ans += c;
			if (b > 0) {
				arr.push_back({a, b});
			}
		}
	}
	n = arr.size();

	ld mn_val = 0;

	for (auto& [x, y] : arr) {
		if (x == 0) {
			mn_val = max(mn_val, y);
		}
	}

	ld left = mn_val;
	ld right = 1e9;
	ld mid;
	ld add = 0;
	for (int itr = 0; itr < 500; itr++) {
		mid = (left + right) / 2;
		ld used = 0;
		ld getted = 0;
		for (int i = 0; i < n; i++) {
			auto [a, b] = arr[i];
			// b + 2ax == mid
			// x = (mid - b) / (2a);
			if (a == 0) {
				continue;
			} else {
				ld x = (mid - b) / (2 * a);
				x = min(x, ld(-1) * b / 2 / a);
				if (x >= 0) {
					getted += a * x * x + b * x;
					used += x;
				}
			}
		}
		if (used <= s && mn_val > 0) {
			getted += mn_val * (s - used);
		}
		if (used <= s) {
			add = max(add, getted);
		}
		if (used > s) {
			left = mid;
		} else {
			right = mid;
		}
	}

	ans += add;

	cout << fixed << setprecision(15) << ans << '\n';
}