#include <bits/stdc++.h>
using namespace std;
template <typename A, size_t N, typename T>
void Fill(A (&array)[N], const T& val) {
  std::fill((T*)array, (T*)(array + N), val);
}
template <class T>
inline bool chmax(T& a, T b) {
  if (a < b) {
    a = b;
    return true;
  }
  return false;
}
template <class T>
inline bool chmin(T& a, T b) {
  if (a > b) {
    a = b;
    return true;
  }
  return false;
}
template <unsigned int mod>
class ModInt {
 private:
  unsigned int v;
  static unsigned int norm(const unsigned int& x) {
    return x < mod ? x : x - mod;
  }
  static ModInt make(const unsigned int& x) {
    ModInt m;
    return m.v = x, m;
  }
  static ModInt inv(const ModInt& x) { return make(inverse(x.v, mod)); }
  static unsigned int inverse(int a, int m) {
    int u[] = {a, 1, 0}, v[] = {m, 0, 1}, t;
    while (*v) {
      t = *u / *v;
      swap(u[0] -= t * v[0], v[0]), swap(u[1] -= t * v[1], v[1]),
          swap(u[2] -= t * v[2], v[2]);
    }
    return (u[1] % m + m) % m;
  }

 public:
  ModInt() : v{0} {}
  ModInt(const long long val) : v{norm(val % mod + mod)} {}
  ModInt(const ModInt<mod>& n) : v{n()} {}
  explicit operator bool() const noexcept { return v != 0; }
  bool operator!() const noexcept { return !static_cast<bool>(*this); }
  ModInt& operator=(const ModInt& n) { return v = n(), (*this); }
  ModInt& operator=(const long long val) {
    return v = norm(val % mod + mod), (*this);
  }
  ModInt operator+() const { return *this; }
  ModInt operator-() const { return v == 0 ? make(0) : make(mod - v); }
  ModInt operator+(const ModInt& val) const { return make(norm(v + val())); }
  ModInt operator-(const ModInt& val) const {
    return make(norm(v + mod - val()));
  }
  ModInt operator*(const ModInt& val) const {
    return make((long long)v * val() % mod);
  }
  ModInt operator/(const ModInt& val) const { return *this * inv(val); }
  ModInt& operator+=(const ModInt& val) { return *this = *this + val; }
  ModInt& operator-=(const ModInt& val) { return *this = *this - val; }
  ModInt& operator*=(const ModInt& val) { return *this = *this * val; }
  ModInt& operator/=(const ModInt& val) { return *this = *this / val; }
  ModInt operator+(const long long val) const { return ModInt{v + val}; }
  ModInt operator-(const long long val) const { return ModInt{v - val}; }
  ModInt operator*(const long long val) const {
    return ModInt{(long long)v * (val % mod)};
  }
  ModInt operator/(const long long val) const {
    return ModInt{(long long)v * inv(val)};
  }
  ModInt& operator+=(const long long val) { return *this = *this + val; }
  ModInt& operator-=(const long long val) { return *this = *this - val; }
  ModInt& operator*=(const long long val) { return *this = *this * val; }
  ModInt& operator/=(const long long val) { return *this = *this / val; }
  bool operator==(const ModInt& val) const { return v == val.v; }
  bool operator!=(const ModInt& val) const { return !(*this == val); }
  bool operator==(const long long val) const {
    return v == norm(val % mod + mod);
  }
  bool operator!=(const long long val) const { return !(*this == val); }
  unsigned int operator()() const { return v; }
  friend ModInt operator+(const long long val, const ModInt& n) {
    return n + val;
  }
  friend ModInt operator-(const long long val, const ModInt& n) {
    return ModInt{val - n()};
  }
  friend ModInt operator*(const long long val, const ModInt& n) {
    return n * val;
  }
  friend ModInt operator/(const long long val, const ModInt& n) {
    return ModInt{val} / n;
  }
  friend bool operator==(const long long val, const ModInt& n) {
    return n == val;
  }
  friend bool operator!=(const long long val, const ModInt& n) {
    return !(val == n);
  }
  friend istream& operator>>(istream& is, ModInt& n) {
    unsigned int v;
    return is >> v, n = v, is;
  }
  friend ostream& operator<<(ostream& os, const ModInt& n) {
    return (os << n());
  }
  friend ModInt mod_pow(ModInt x, long long n) {
    ModInt ans = 1;
    while (n) {
      if (n & 1) ans *= x;
      x *= x, n >>= 1;
    }
    return ans;
  }
};
using mod = ModInt<998244353>;
mod dp[3001][3001];
int main() {
  int n, s;
  cin >> n >> s;
  vector<int> a(n);
  for (int i = 0; i < (int)(n); ++i) {
    cin >> a[i];
  }
  dp[0][0] = 1;
  for (int i = 0; i < (int)(n); ++i) {
    for (int j = 0; j < (int)(s + 1); ++j) {
      dp[i + 1][j] += dp[i][j];
      if (j + a[i] > s) continue;
      if (dp[i][j] != 0) {
        if (j == 0) {
          dp[i + 1][j + a[i]] += dp[i][j] * (i + 1);
        } else if (j + a[i] == s) {
          dp[i + 1][j + a[i]] += dp[i][j] * (n - i);
        } else {
          dp[i + 1][j + a[i]] += dp[i][j];
        }
      }
    }
  }
  cout << dp[n][s] << endl;
  return 0;
}
