#include <bits/stdc++.h>
using namespace std;
int main() {
  long long int n, m, s, a[101], b[101], x, y, i;
  double c, d, e, f, g = 10000000, h, k = -1;
  cin >> n >> m >> s;
  for (i = 1; i <= n; i++) cin >> a[i];
  cin >> x >> y;
  for (i = 2; i <= n; i++) {
    c = double(a[i]) / double(m);
    d = (x - a[i]) * (x - a[i]);
    e = y * y;
    f = double(sqrt(d + e));
    f /= s;
    c += f;
    if (c < g || (c == g && d < k)) {
      k = d;
      g = c;
      h = i;
    }
  }
  cout << h;
}
