#include <bits/stdc++.h>
using namespace std;
using lli = long long int;
using Vint = std::vector<int>;
using Vlli = std::vector<lli>;
using Wint = std::vector<Vint>;
using Wlli = std::vector<Vlli>;
using Vbool = std::vector<bool>;
using pii = std::pair<int, int>;
using pll = std::pair<lli, lli>;
constexpr int MOD = 1e9 + 7;
constexpr int INFi = 2e9 + 1;
constexpr lli INFl = (lli)(9e18) + 1;
const vector<pii> DXDY = {std::make_pair(1, 0), std::make_pair(-1, 0),
                          std::make_pair(0, 1), std::make_pair(0, -1)};
constexpr char BR = '\n';
template <class T>
inline int argmin(std::vector<T> vec) {
  return min_element(vec.begin(), vec.end()) - vec.begin();
}
template <class T>
inline int argmax(std::vector<T> vec) {
  return max_element(vec.begin(), vec.end()) - vec.begin();
}
template <class T>
inline void chmax(T &a, T b) {
  a = max(a, b);
}
template <class T>
inline void chmin(T &a, T b) {
  a = min(a, b);
}
inline int toInt(string &s) {
  int res = 0;
  for (char a : s) res = 10 * res + (a - '0');
  return res;
}
inline int toInt(const string s) {
  int res = 0;
  for (char a : s) res = 10 * res + (a - '0');
  return res;
}
inline long long int toLong(string &s) {
  lli res = 0;
  for (char a : s) res = 10 * res + (a - '0');
  return res;
}
inline long long int toLong(const string s) {
  lli res = 0;
  for (char a : s) res = 10 * res + (a - '0');
  return res;
}
template <class T>
inline std::string toString(T n) {
  if (n == 0) return "0";
  std::string res = "";
  if (n < 0) {
    n = -n;
    while (n != 0) {
      res += (char)(n % 10 + '0');
      n /= 10;
    }
    std::reverse(res.begin(), res.end());
    return '-' + res;
  }
  while (n != 0) {
    res += (char)(n % 10 + '0');
    n /= 10;
  }
  std::reverse(res.begin(), res.end());
  return res;
}
int main(void) {
  int n, a;
  scanf("%d %d\n", &n, &a);
  Vint A(n);
  for (auto &(ele) : (A)) scanf("%d", &ele);
  vector<Wlli> Data(n + 1);
  int til_sum = 0, tmp;
  Data.at(0).resize(1, Vlli(1, 1));
  for (int(i) = (0); (i) < (n); (i)++) {
    Data.at(i + 1).resize(i + 2, Vlli(til_sum + A.at(i) + 1, 0));
    for (int(j) = (0); (j) <= (i); (j)++)
      for (int(k) = (0); (k) <= (til_sum); (k)++) {
        if ((tmp = Data.at(i).at(j).at(k)) != 0) {
          Data.at(i + 1).at(j).at(k) += tmp;
          Data.at(i + 1).at(j + 1).at(k + A.at(i)) += tmp;
        }
      }
    til_sum += A.at(i);
  }
  lli ans = 0;
  Wlli &End = Data.at(n);
  int i = 1;
  while (i <= n and a * i <= til_sum) {
    ans += End.at(i).at(a * i);
    i++;
  }
  printf("%lld\n", ans);
  return 0;
}
