#pragma region template
// clang-format off

#ifdef ONLINE_JUDGE
#pragma GCC optimize "fast-math"
#endif

#ifdef LOCAL_NDEBUG
#include <headers.hpp>
#endif

// #define USE_EXTERNAL_CONTAINERS
// #define NO_PRINT_INF

#ifdef USE_EXTERNAL_CONTAINERS
#define PROPER
#include <boost/container/flat_map.hpp>
#include <boost/container/flat_set.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
template <class T>          using tree    = __gnu_pbds::tree<T, __gnu_pbds::null_type, std::less<T>, __gnu_pbds::rb_tree_tag, __gnu_pbds::tree_order_statistics_node_update>;
template <class S, class T> using hash_table = __gnu_pbds::gp_hash_table<S, T>;
#endif

#ifdef LOCAL_DEBUG
#if (defined USE_EXTERNAL_CONTAINERS) || (defined NO_PRINT_INF)
#include <../src/debugger.hpp>
#else
#include <debugger.hpp>
#endif
#endif

// #define PROPER
#define _USE_MATH_DEFINES

#if (defined __INTELLISENSE__) && (!defined PROPER)
#define NDEBUG
namespace std {
#endif

#include <cassert>
#include <cctype>
#include <cmath>
#include <cstddef>
#include <cstdint>
#include <cstdlib>
#include <algorithm>
#include <array>
#include <bitset>
#include <charconv>
#include <complex>
#include <deque>
#include <functional>
#include <iostream>
#include <iomanip>
#include <iterator>
#include <limits>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <regex>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <string_view>
#include <tuple>
#include <typeinfo>
#include <type_traits>
#include <utility>
#include <vector>

#if (defined __INTELLISENSE__) && (!defined PROPER)
  using namespace std;
}
#endif

using namespace std::literals;

#ifdef LOCAL_DEBUG
#define CP_LIBRARY_DEBUG_LEVEL 2
#define STR(x) #x
#define STRINGIFY(x) STR(x)
#define FILE_LINE "[Debug] ./" __FILE__ ":" STRINGIFY(__LINE__)
#define see(...) debugger::multi_print(#__VA_ARGS__, __VA_ARGS__)
#define see2(arg) arg.debug_print(#arg)
#define here(...) debugger::os << FILE_LINE << " in " << __func__ << ": \033[32mReached\033[39m\n"
#define com(msg) debugger::os << FILE_LINE << " in " << __func__ << ":\n    \033[36mComment:\033[39m " << msg << "\n"
#define err(msg) debugger::os << FILE_LINE << " in " << __func__ << ":\n    \033[31mError:\033[39m " << msg << "\n"
#define local(...) do { __VA_ARGS__ } while (0)
#define alter(x, y) x
#define pass (com("ToDo: Fill here"), true)
#else
#define see(...) (static_cast<void>(0))
#define see2(arg) (static_cast<void>(0))
#define here(...) (static_cast<void>(0))
#define com(msg) (static_cast<void>(0))
#define err(msg) (static_cast<void>(0))
#define local(...) (static_cast<void>(0))
#define alter(x, y) y
#ifdef __INTELLISENSE__
#define pass (static_cast<void>(0))
#else
#define pass static_assert(false)
#endif
#endif

#if (defined LOCAL_DEBUG) && (!defined NOWARN)
#define warn(msg) debugger::os << FILE_LINE << " in " << __func__ << ":\n    \033[33mWarning:\033[39m " << msg << "\n"
#else
#define warn(msg) (static_cast<void>(0))
#endif

#if (defined LOCAL_DEBUG) || (defined LOCAL_NDEBUG) || (defined __INTELLISENSE__)
#define NOEXCEPT
#define M_assert(expr) assert(expr)
#define O_assert(expr) assert(expr)
#else
#define NOEXCEPT noexcept
#define M_assert(expr) do {if(__builtin_expect(!(expr), 0)) {auto p = static_cast<std::int64_t*>(std::malloc(1 << 30)); for (int i = 0; i < (1 << 27); p[i] = 1, i += (1 << 9)); std::cerr << (*p);}} while (0)
#define O_assert(expr) do {if(__builtin_expect(!(expr), 0)) {const auto X = std::string(1000, '-'); for(int i = 0; i < (1 << 18); i++) std::cout << X;}} while (0)
#endif

#define CP_LIBRARY_WARN(msg) warn(msg)
#define CP_LIBRARY_ASSERT(...) O_assert(__VA_ARGS__)

#define as(type, val) static_cast<std::decay_t<type>>(val)
#define INDIRECT(...) __VA_ARGS__

#define rep(loop_var, loop_end) \
  for ( \
    auto loop_var = as(std::make_signed_t<decltype(loop_end)>, 0); \
    loop_var < as(decltype(loop_var), loop_end); \
    ++loop_var \
  )
#define rng(loop_var, loop_start, loop_end, loop_increment) \
  for ( \
    auto loop_var = as(INDIRECT(std::make_signed_t<std::common_type_t<decltype(loop_start), decltype(loop_end)>>), loop_start); \
    ((loop_increment) > 0) ? (loop_var < as(decltype(loop_var), loop_end)) : (loop_var > as(decltype(loop_var), loop_end)); \
    loop_var += (loop_increment) \
  )
#define erng(loop_var, loop_start, loop_end, loop_increment) \
  for ( \
    auto loop_var = as(INDIRECT(std::make_signed_t<std::common_type_t<decltype(loop_start), decltype(loop_end)>>), loop_start); \
    ((loop_increment) > 0) ? (loop_var <= as(decltype(loop_var), loop_end)) : (loop_var >= as(decltype(loop_var), loop_end)); \
    loop_var += (loop_increment) \
  )

[[maybe_unused]] constexpr int         INF   = 1000000005;
[[maybe_unused]] constexpr long long   LINF  = 1000000000000000005LL;
[[maybe_unused]] constexpr double      EPS   = 1e-9;
[[maybe_unused]] constexpr long double LEPS  = 1e-14L;
[[maybe_unused]] constexpr int         dy[9] = {1, 0, -1, 0, 1, 1, -1, -1, 0};
[[maybe_unused]] constexpr int         dx[9] = {0, 1, 0, -1, -1, 1, 1, -1, 0};

template <class... Ts>
[[nodiscard]] constexpr auto Min(const Ts... args) { return std::min({ as(std::common_type_t<Ts...>, args) ... }); }
template <class... Ts>
[[nodiscard]] constexpr auto Max(const Ts... args) { return std::max({ as(std::common_type_t<Ts...>, args) ... }); }

// clang-format on
#pragma endregion

//! @file binary_search.hpp

#ifndef CP_LIBRARY_BINARY_SEARCH_HPP
#  define CP_LIBRARY_BINARY_SEARCH_HPP

#  include <cassert>
#  include <type_traits>
#  include <utility>

#  ifndef CP_LIBRARY_ASSERT
//! @brief Assert macro
#    define CP_LIBRARY_ASSERT(...) assert(__VA_ARGS__)
#    define CP_LIBRARY_ASSERT_NOT_DEFINED
#  endif

namespace lib {

//! @brief Find the minimum or maximum value that satisfies the condition.
//! @tparam Tp Return type (deduced from parameters)
//! @tparam Func callable type (function reference, class with operator(), ...)
//! @param ok Initial value for which the condition is satisfied
//! @param ng Initial value for which the condition is not satisfied
//! @param f Callable object that takes 1 parameter of Tp and returns bool indicating if the condition is satisfied
//! @param diff Difference (end condition of binary search). 1 for integers, small value (e.g. 1e-9) for real numbers
//! @return minimum value (if ok < ng) or maximum value (if ok > ng)
//! @note One and only one boundary value between ok and ng must exist.
//! @note Time complexity: O(log(|ok - ng|))
template <typename Tp, typename Func>
[[nodiscard]] Tp binary_search(Tp ok, Tp ng, const Func& f, const Tp diff = 1) {
  static_assert(std::is_same_v<decltype(std::declval<Func>()(std::declval<Tp>())), bool>);
  CP_LIBRARY_ASSERT(f(ok));
  CP_LIBRARY_ASSERT(!f(ng));

  if (ok < ng)
    while (ng - ok > diff) {
      const Tp mid       = ok + (ng - ok) / 2;
      (f(mid) ? ok : ng) = mid;
    }
  else
    while (ok - ng > diff) {
      const Tp mid       = ng + (ok - ng) / 2;
      (f(mid) ? ok : ng) = mid;
    }

  return ok;
}

}  // namespace lib

#  ifdef CP_LIBRARY_ASSERT_NOT_DEFINED
#    undef CP_LIBRARY_ASSERT
#    undef CP_LIBRARY_ASSERT_NOT_DEFINED
#  endif

#endif  // CP_LIBRARY_BINARY_SEARCH_HPP

long long N, A, B, X, Y;
std::vector<long long> H;

bool check(long long K) {
  std::vector<long long> HH = H;
  long long AA              = A;

  for (auto&& x : HH) {
    x -= K;
    if (x < 0) {
      x = 0;
    }
  }

  rep(i, N) {
    long long t = Min(AA, HH[i] / X);
    HH[i] -= X * t;
    AA -= t;

    if (AA == 0) {
      break;
    }
  }

  if (AA > 0) {
    std::sort(std::begin(HH), std::end(HH), [&](long long L, long long R) {
      return L % X > R % X;
    });

    rep(i, N) {
      long long t = Min(AA, (HH[i] + X - 1) / X);
      HH[i] -= X * t;
      if (HH[i] < 0) {
        HH[i] = 0;
      }
      AA -= t;

      if (AA == 0) {
        break;
      }
    }
  }

  return std::reduce(std::cbegin(HH), std::cend(HH), 0LL) <= B * Y;
}

void solve() {
  std::cin >> N >> A >> B >> X >> Y;

  H.resize(N);
  std::copy_n(std::istream_iterator<decltype(H)::value_type>(std::cin), std::size(H), std::begin(H));

  if (check(0)) {
    std::cout << "0\n";
    return;
  }

  long long ok = INF, ng = 0;
  std::cout << lib::binary_search(ok, ng, check) << '\n';
}

int main() {
  std::ios_base::sync_with_stdio(false);
  std::cin.tie(nullptr);
  std::cout << std::fixed << std::setprecision(25);

  solve();
}