#include <bits/stdc++.h>

using namespace std;

#define int long double
#define f first
#define s second

struct ss{
    int x, y, k;
};

pair < int, int > f(ss a){
    return {sqrt(a.x * a.x + a.y * a.y), a.k};
}

main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << fixed << setprecision(9);
    int n, s;
    cin >> n >> s;
    vector < ss > v(n);
    vector < pair < int, int > > r(n);
    for (int i = 0; i < n; i++)
    {
        cin >> v[i].x >> v[i].y >> v[i].k;
        r[i] = f(v[i]);
    }
    sort (r.begin(), r.end());
    int sum = s;
    for (int i = 0; i < n; i++){
        sum += r[i].s;
        if (sum >= 1000000){
            cout << r[i].f;
            exit(0);
        }
    }
    cout << -1;

}