#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, a, b, c, col;
  int ans;
  scanf("%d %d %d %d", &n, &a, &b, &c);
  for (int i = 0; i < n; i++) {
    scanf("%d", &col);
    c += col;
  }
  ans = c / (a + (b * n));
  printf("%d\n", ans);
  return (0);
}
