#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  double a, b, f, e = 10000000, k;
  cin >> n >> a >> b;
  double p[n];
  for (int i = 0; i < n; i++) cin >> p[i];
  double c, d;
  cin >> c >> d;
  for (int i = 0; i < n; i++) {
    f = p[i] / a + sqrt((c - p[i]) * (c - p[i]) + d * d) / b;
    if (f <= e && i != 0) {
      e = f;
      k = i;
    }
  }
  cout << k + 1;
}
