#include <bits/stdc++.h>
using namespace std;
int a[101];
int main() {
  int n, i, x0;
  double b, s, min = 1e12;
  cin >> n >> b >> s;
  for (i = 0; i < n; i++) cin >> a[i];
  double x, y;
  cin >> x >> y;
  for (i = 1; i < n; i++) {
    double t1 = sqrt((a[i] - x) * (a[i] - x) + y * y) / s + a[i] / b;
    if (t1 <= min) min = t1, x0 = i;
  }
  cout << x0 + 1 << endl;
}
