Problem: Igor the analyst fell asleep on the work and had a strange dream. In the dream his desk was crowded with computer mice, so he bought a mousetrap to catch them.

The desk can be considered as an infinite plane, then the mousetrap is a rectangle which sides are parallel to the axes, and which opposite sides are located in points (x1, y1) and (x2, y2).

Igor wants to catch all mice. Igor has analysed their behavior and discovered that each mouse is moving along a straight line with constant speed, the speed of the i-th mouse is equal to (vix, viy), that means that the x coordinate of the mouse increases by vix units per second, while the y coordinates increases by viy units. The mousetrap is open initially so that the mice are able to move freely on the desk. Igor can close the mousetrap at any moment catching all the mice that are strictly inside the mousetrap.

Igor works a lot, so he is busy in the dream as well, and he asks you to write a program that by given mousetrap's coordinates, the initial coordinates of the mice and their speeds determines the earliest time moment in which he is able to catch all the mice. Please note that Igor can close the mousetrap only once.

Input

The first line contains single integer n (1 ≤ n ≤ 100 000) — the number of computer mice on the desk.

The second line contains four integers x1, y1, x2 and y2 (0 ≤ x1 ≤ x2 ≤ 100 000), (0 ≤ y1 ≤ y2 ≤ 100 000) — the coordinates of the opposite corners of the mousetrap.

The next n lines contain the information about mice.

The i-th of these lines contains four integers rix, riy, vix and viy, (0 ≤ rix, riy ≤ 100 000,  - 100 000 ≤ vix, viy ≤ 100 000), where (rix, riy) is the initial position of the mouse, and (vix, viy) is its speed.

Output

In the only line print minimum possible non-negative number t such that if Igor closes the mousetrap at t seconds from the beginning, then all the mice are strictly inside the mousetrap. If there is no such t, print -1.

Your answer is considered correct if its absolute or relative error doesn't exceed 10 - 6. 

Formally, let your answer be a, and the jury's answer be b. Your answer is considered correct if <image>.

Examples

Input

4
7 7 9 8
3 5 7 5
7 5 2 4
3 3 7 8
6 6 3 2


Output

0.57142857142857139685


Input

4
7 7 9 8
0 3 -5 4
5 0 5 4
9 9 -1 -6
10 5 -7 -10


Output

-1

Note

Here is a picture of the first sample

Points A, B, C, D - start mice positions, segments are their paths.

<image>

Then, at first time when all mice will be in rectangle it will be looks like this:

<image>

Here is a picture of the second sample

<image>

Points A, D, B will never enter rectangle.

Solution (in CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
struct Point {
  double x, y;
  Point() {
    x = 0;
    y = 0;
  }
  Point(double a, double b) {
    x = a;
    y = b;
  }
};
struct vec {
  double x, y;
};
struct Line {
  double a, b, c;
};
double ppdist(Point a, Point b) {
  return sqrt(pow(a.x - b.x, 2) + pow(a.y - b.y, 2));
}
bool samept(Point A, Point B) {
  double a = A.x - B.x;
  double b = A.y - B.y;
  if (abs(a) < 1e-10 && abs(b) < 1e-10) return true;
  return false;
}
vec createVect(Point a, Point b) {
  vec p;
  p.x = b.x - a.x;
  p.y = b.y - a.y;
  return p;
}
double dot(vec a, vec b) { return a.x * b.x + a.y * b.y; }
double cross(vec a, vec b) { return a.x * b.y - a.y * b.x; }
double length(vec a) { return sqrt(pow(a.x, 2) + pow(a.y, 2)); }
double lpdist(Point a, Point b, Point c) {
  vec AB = createVect(a, b), AC = createVect(a, c), BC = createVect(b, c),
      BA = createVect(b, a);
  if (dot(AB, BC) > 0) return ppdist(c, b);
  if (dot(BA, AC) > 0) return ppdist(a, c);
  return abs(cross(AB, AC) / (length(AB)));
}
double areapoly(Point A[], int n) {
  double ans = 0;
  for (int i = 1; i < n - 1; i++) {
    vec a = createVect(A[0], A[i]);
    vec b = createVect(A[0], A[i + 1]);
    ans += cross(a, b);
  }
  return abs(ans / 2.0);
}
Line genline(Point a, Point b) {
  Line x;
  x.a = b.y - a.y;
  x.b = a.x - b.x;
  x.c = x.a * a.x + x.b * a.y;
  return x;
}
bool insideCircle(Point cent, double rad, Point A) {
  if ((rad - ppdist(cent, A)) > 1e-10) return false;
  return true;
}
bool oncircle(Point cent, double rad, Point A) {
  if (abs(rad - ppdist(cent, A)) < 1e-10) return true;
  return false;
}
Point twopointsrad(Point A, Point B, double r) {
  double s = pow(ppdist(A, B), 2);
  double d = sqrt(r * r / s - 0.25);
  if (d < 0) return Point(1e9 + 1, 1e9 + 1);
  return Point((A.x + B.x) / 2.0 + (A.y - B.y) * d,
               (A.y + B.y) / 2.0 + (B.x - A.x) * d);
}
bool arepar(Line A, Line B) {
  double d = A.a * B.b - B.a * A.b;
  if (abs(d) < 1e-10) {
    return true;
  }
  return false;
}
bool checkint(Line A, Line B) {
  double d = A.a * B.b - B.a * A.b;
  if (abs(d) < 1e-10) {
    return false;
  }
  return true;
}
Point findint(Line A, Line B) {
  Point ans;
  double d = A.a * B.b - B.a * A.b;
  if (abs(d) < 1e-10) {
    ans.x = -1;
    ans.y = -1;
  } else {
    double p = B.b * A.c - A.b * B.c;
    double q = A.a * B.c - B.a * A.c;
    ans.x = p / d;
    ans.y = q / d;
  }
  return ans;
}
double findangle(Point a, Point b, Point c) {
  vec x = createVect(a, b);
  vec y = createVect(b, c);
  return acos(dot(x, y) / (length(x) * length(y)));
}
Point getpoint(Line A) {
  double x = 1;
  double y = (A.c - A.a * x) / A.b;
  return Point(x, y);
}
Point findcentre(Point A, Point B, Point C) {
  Line p = genline(A, B), q = genline(B, C);
  Line j, k;
  j.a = -1 * p.b;
  j.b = p.a;
  j.c = j.a * (A.x + B.x) / 2.0 + j.b * (A.y + B.y) / 2.0;
  k.a = -1 * q.b;
  k.b = q.a;
  k.c = k.a * (B.x + C.x) / 2.0 + k.b * (B.y + C.y) / 2.0;
  return findint(j, k);
}
Point findmirror(Point A, Line P) {
  Line p = P, j;
  j.a = -1 * p.b;
  j.b = p.a;
  j.c = j.a * A.x + j.b * A.y;
  Point d = findint(P, j);
  Point ans;
  ans.x = 2 * d.x - A.x;
  ans.y = 2 * d.y - A.y;
  return ans;
}
Point rotate(Point A, double degree) {
  double rad = (degree * 3.1415926535897932384626433832795028841 / 180.0);
  Point ans;
  ans.x = A.x * cos(rad) - A.y * sin(rad);
  ans.y = A.x * sin(rad) + A.y * cos(rad);
  return ans;
}
int visited[100001];
vector<Point> convhull(Point A[], int n, int coll) {
  double p = 1e9 + 1, q = -1 * 1e9 + 1;
  int f = -1;
  vector<Point> ans;
  memset(visited, 0, sizeof(visited));
  for (int i = 0; i < n; i++) {
    if (A[i].x <= p) {
      if (A[i].x == p)
        if (A[i].y > q) continue;
      p = A[i].x;
      q = A[i].y;
      f = i;
    }
  }
  int j = f;
  int beg = j;
  do {
    double dist;
    int k = -1;
    if (coll)
      dist = 1e9 + 1;
    else
      dist = 0;
    for (int i = 0; i < n; i++) {
      if (i == j) continue;
      if (visited[i]) continue;
      if (k == -1) k = i;
      double d = ppdist(A[i], A[j]);
      double cr = cross(createVect(A[j], A[i]), createVect(A[j], A[k]));
      if (cr < 0) {
        k = i;
        dist = d;
      } else if (!cr) {
        if (coll && d < dist) {
          k = i;
          dist = d;
        }
        if (!coll && d > dist) {
          k = i;
          dist = d;
        }
      }
    }
    j = k;
    visited[j] = 1;
    ans.push_back(A[j]);
  } while (beg != j);
  return ans;
}
bool collinear(Point A, Point B, Point C) {
  double area = A.x * (B.y - C.y) + B.x * (C.y - A.y) + C.x * (A.y = B.y);
  if (abs(area) < 1e-10) return true;
  return false;
}
Point piv;
bool mycomp(Point& A, Point& B) {
  if (collinear(A, B, piv)) {
    return ppdist(A, piv) < ppdist(B, piv);
  }
  return (atan((A.y - piv.y) / (A.x - piv.x)) -
          atan((B.y - piv.y) / (B.x - piv.x))) < 0;
}
vector<Point> GrahamCH(Point A[], int n) {
  vector<Point> ans;
  if (n <= 3) {
    for (int i = 0; i < n; i++) ans.push_back(A[i]);
    ans.push_back(A[0]);
    return ans;
  }
  int ind = -1;
  double p = -1 * 1e9 + 1, q = 1e9 + 1;
  for (int i = 0; i < n; i++) {
    if (A[i].y <= q) {
      if (A[i].y == q)
        if (A[i].x < p) continue;
      p = A[i].x;
      q = A[i].y;
      ind = i;
    }
  }
  Point temp = A[ind];
  A[ind] = A[0];
  A[0] = temp;
  piv = A[0];
  sort(A + 1, A + n, mycomp);
  ans.push_back(A[n - 1]);
  ans.push_back(A[0]);
  ans.push_back(A[1]);
  int i = 2;
  while (i < n) {
    int x = ans.size() - 1;
    cout << x << "\n";
    if (cross(createVect(ans[x], A[i]), createVect(ans[x], ans[x - 1])) >
        1e-10) {
      ans.push_back(A[i]);
      i++;
    } else
      ans.pop_back();
  }
  return ans;
}
bool geteq(double a, double b) { return abs(a - b) < 1e-10; }
double rx[100010], ry[100010], vx[100010], vy[100010];
Line val[100010];
int main() {
  ios::sync_with_stdio(false);
  cin.tie(NULL);
  int n;
  cin >> n;
  double x1, y1, x2, y2;
  cin >> x1 >> y1 >> x2 >> y2;
  for (int i = 0; i < n; i++) {
    cin >> rx[i] >> ry[i] >> vx[i] >> vy[i];
    val[i] = genline(Point(rx[i], ry[i]), Point(rx[i] + vx[i], ry[i] + vy[i]));
  }
  Line A[4];
  A[0] = genline(Point(x1, y1), Point(x1, y2));
  A[1] = genline(Point(x1, y2), Point(x2, y2));
  A[2] = genline(Point(x2, y2), Point(x2, y1));
  A[3] = genline(Point(x2, y1), Point(x1, y1));
  vector<pair<double, double> > rngs;
  for (int i = 0; i < n; i++) {
    vector<Point> df;
    if (abs(vx[i]) < 1e-10 && abs(vy[i]) < 1e-10) {
      if (rx[i] > x1 && rx[i] < x2 && ry[i] > y1 && ry[i] < y2) {
        rngs.push_back(make_pair(0, 1e18));
        continue;
      } else {
        cout << -1 << '\n';
        return 0;
      }
    }
    for (int j = 0; j < 4; j++) {
      if (checkint(val[i], A[j])) {
        Point temp = findint(val[i], A[j]);
        if (temp.x > x1 - 1e-10 && x2 > temp.x - 1e-10 && temp.y > y1 - 1e-10 &&
            y2 > temp.y - 1e-10) {
          int mk = 0;
          for (int k = 0; k < 4; k++) {
            if (!checkint(val[i], A[k])) {
              if (abs(val[i].a) < 1e-10 &&
                  (abs(ry[i] - y1) < 1e-10 || abs(ry[i] - y2) < 1e-10))
                mk = 1;
              if (abs(val[i].b) < 1e-10 &&
                  (abs(rx[i] - x1) < 1e-10 || abs(rx[i] - x2) < 1e-10))
                mk = 1;
            }
          }
          if (!mk) df.push_back(temp);
        }
      }
    }
    vector<Point> ins;
    int pres[4] = {0};
    for (int j = 0; j < df.size(); j++) {
      if (!pres[j]) {
        for (int k = j + 1; k < df.size(); k++) {
          if (abs(df[j].x - df[k].x) < 1e-10 && abs(df[j].y - df[k].y) < 1e-10)
            pres[k] = 1;
        }
        ins.push_back(df[j]);
      }
    }
    if (ins.size() < 2) {
      cout << -1 << '\n';
      return 0;
    } else {
      double t1, t2;
      if (abs(vx[i]) > 1e-10) {
        t1 = (ins[0].x - rx[i]) / vx[i];
        t2 = (ins[1].x - rx[i]) / vx[i];
      } else if (abs(vy[i]) > 1e-10) {
        t1 = (ins[0].y - ry[i]) / vy[i];
        t2 = (ins[1].y - ry[i]) / vy[i];
      } else {
        t1 = 0;
        t2 = 1e18;
      }
      if (t1 > t2 + 1e-10) swap(t1, t2);
      if (t1 < 0) {
        t1 = 0;
      }
      if (abs(t2) > 0) {
        t2 -= 1e-10;
        t1 += 1e-10;
        rngs.push_back(make_pair(t1, t2));
      } else {
        cout << -1 << '\n';
        return 0;
      }
    }
  }
  double maxi = -1e18, mini = 1e18;
  for (int i = 0; i < n; i++) {
    maxi = max(maxi, rngs[i].first);
    mini = min(mini, rngs[i].second);
  }
  if (mini > maxi - 1e-10) {
    printf("%.17lf\n", maxi);
  } else
    cout << -1 << '\n';
}