#include <bits/stdc++.h>
using namespace std;
int main() {
  int N, L, M, R;
  cin >> N >> L >> M >> R;
  int m[123];
  for (int i = 0; i < N; i++) {
    cin >> m[i];
  }
  bitset<22345> pos, mask;
  for (int i = 0; i < M * 2 + 1; i++) {
    pos[i] = mask[i] = true;
  }
  for (int i = N - 1; i >= 0; i--) {
    pos = (pos << m[i] * R | pos >> m[i] * R) & mask;
  }
  cout << (pos[M] ? "Yes" : "No") << endl;
}
