You are given an integer x represented as a product of n its prime divisors p_1 ⋅ p_2, ⋅ … ⋅ p_n. Let S be the set of all positive integer divisors of x (including 1 and x itself).

We call a set of integers D good if (and only if) there is no pair a ∈ D, b ∈ D such that a ≠ b and a divides b.

Find a good subset of S with maximum possible size. Since the answer can be large, print the size of the subset modulo 998244353.

Input

The first line contains the single integer n (1 ≤ n ≤ 2 ⋅ 10^5) — the number of prime divisors in representation of x.

The second line contains n integers p_1, p_2, ..., p_n (2 ≤ p_i ≤ 3 ⋅ 10^6) — the prime factorization of x.

Output

Print the maximum possible size of a good subset modulo 998244353.

Examples

Input


3
2999999 43 2999957


Output


3


Input


6
2 3 2 3 2 2


Output


3

Note

In the first sample, x = 2999999 ⋅ 43 ⋅ 2999957 and one of the maximum good subsets is \{ 43, 2999957, 2999999 \}.

In the second sample, x = 2 ⋅ 3 ⋅ 2 ⋅ 3 ⋅ 2 ⋅ 2 = 144 and one of the maximum good subsets is \{ 9, 12, 16 \}.
#include <bits/stdc++.h>
using namespace std;
const int maxn = 3e6 + 10;
namespace FFT {
const int maxf = 1 << 17;
struct cp {
  double x, y;
  cp(double x = 0, double y = 0) : x(x), y(y) {}
  cp operator+(const cp& rhs) const { return cp(x + rhs.x, y + rhs.y); }
  cp operator-(const cp& rhs) const { return cp(x - rhs.x, y - rhs.y); }
  cp operator*(const cp& rhs) const {
    return cp(x * rhs.x - y * rhs.y, x * rhs.y + y * rhs.x);
  }
  cp operator!() const { return cp(x, -y); }
} rts[maxf + 1];
cp fa[maxf], fb[maxf];
cp fc[maxf], fd[maxf];
int bitrev[maxf];
void fftinit() {
  int k = 0;
  while ((1 << k) < maxf) k++;
  bitrev[0] = 0;
  for (int i = 1; i < maxf; i++) {
    bitrev[i] = bitrev[i >> 1] >> 1 | ((i & 1) << k - 1);
  }
  double PI = acos((double)-1.0);
  rts[0] = rts[maxf] = cp(1, 0);
  for (int i = 1; i + i <= maxf; i++) {
    rts[i] = cp(cos(i * 2 * PI / maxf), sin(i * 2 * PI / maxf));
  }
  for (int i = maxf / 2 + 1; i < maxf; i++) {
    rts[i] = !rts[maxf - i];
  }
}
void dft(cp a[], int n, int sign) {
  static int isinit;
  if (!isinit) {
    isinit = 1;
    fftinit();
  }
  int d = 0;
  while ((1 << d) * n != maxf) d++;
  for (int i = 0; i < n; i++) {
    if (i < (bitrev[i] >> d)) {
      swap(a[i], a[bitrev[i] >> d]);
    }
  }
  for (int len = 2; len <= n; len <<= 1) {
    int delta = maxf / len * sign;
    for (int i = 0; i < n; i += len) {
      cp *x = a + i, *y = a + i + (len >> 1), *w = sign > 0 ? rts : rts + maxf;
      for (int k = 0; k + k < len; k++) {
        cp z = *y * *w;
        *y = *x - z, *x = *x + z;
        x++, y++, w += delta;
      }
    }
  }
  if (sign < 0) {
    for (int i = 0; i < n; i++) {
      a[i].x /= n;
      a[i].y /= n;
    }
  }
}
void multiply(int a[], int b[], int na, int nb, long long c[], int dup = 0) {
  int n = na + nb - 1;
  while (n != (n & -n)) n += n & -n;
  for (int i = 0; i < n; i++) fa[i] = fb[i] = cp();
  for (int i = 0; i < na; i++) fa[i] = cp(a[i]);
  for (int i = 0; i < nb; i++) fb[i] = cp(b[i]);
  dft(fa, n, 1);
  if (dup) {
    for (int i = 0; i < n; i++) fb[i] = fa[i];
  } else {
    dft(fb, n, 1);
  }
  for (int i = 0; i < n; i++) fa[i] = fa[i] * fb[i];
  dft(fa, n, -1);
  for (int i = 0; i < n; i++) c[i] = (long long)floor(fa[i].x + 0.5);
}
void multiply(int a[], int b[], int na, int nb, int c[], int mod = (int)1e9 + 7,
              int dup = 0) {
  int n = na + nb - 1;
  while (n != (n & -n)) n += n & -n;
  for (int i = 0; i < n; i++) fa[i] = fb[i] = cp();
  static const int magic = 15;
  for (int i = 0; i < na; i++)
    fa[i] = cp(a[i] >> magic, a[i] & (1 << magic) - 1);
  for (int i = 0; i < nb; i++)
    fb[i] = cp(b[i] >> magic, b[i] & (1 << magic) - 1);
  dft(fa, n, 1);
  if (dup) {
    for (int i = 0; i < n; i++) fb[i] = fa[i];
  } else {
    dft(fb, n, 1);
  }
  for (int i = 0; i < n; i++) {
    int j = (n - i) % n;
    cp x = fa[i] + !fa[j];
    cp y = fb[i] + !fb[j];
    cp z = !fa[j] - fa[i];
    cp t = !fb[j] - fb[i];
    fc[i] = (x * t + y * z) * cp(0, 0.25);
    fd[i] = x * y * cp(0, 0.25) + z * t * cp(-0.25, 0);
  }
  dft(fc, n, -1), dft(fd, n, -1);
  for (int i = 0; i < n; i++) {
    long long u = ((long long)floor(fc[i].x + 0.5)) % mod;
    long long v = ((long long)floor(fd[i].x + 0.5)) % mod;
    long long w = ((long long)floor(fd[i].y + 0.5)) % mod;
    c[i] = ((u << magic) + v + (w << magic + magic)) % mod;
  }
}
vector<int> multiply(vector<int> a, vector<int> b, int mod = (int)1e9 + 7) {
  static int fa[maxf], fb[maxf], fc[maxf];
  int na = a.size(), nb = b.size();
  for (int i = 0; i < na; i++) fa[i] = a[i];
  for (int i = 0; i < nb; i++) fb[i] = b[i];
  multiply(fa, fb, na, nb, fc, mod, a == b);
  int k = na + nb - 1;
  vector<int> res(k);
  for (int i = 0; i < k; i++) res[i] = fc[i];
  return res;
}
int fpow(int a, int k, int p) {
  if (!k) return 1;
  int res = a, t = a;
  k--;
  while (k) {
    if (k & 1) res = (long long)res * t % p;
    t = (long long)t * t % p;
    k >>= 1;
  }
  return res;
}
vector<int> invert(vector<int> a, int n, int mod) {
  assert(a[0] != 0);
  vector<int> x(1, fpow(a[0], mod - 2, mod));
  while (x.size() < n) {
    vector<int> tmp(a.begin(), a.begin() + min(a.size(), 2 * x.size()));
    vector<int> nx = multiply(multiply(x, x, mod), tmp, mod);
    x.resize(2 * x.size());
    for (int i = 0; i < x.size(); i++) {
      x[i] += x[i];
      x[i] -= nx[i];
      if (x[i] < 0) x[i] += mod;
      if (x[i] >= mod) x[i] -= mod;
    }
  }
  x.resize(n);
  return x;
}
pair<vector<int>, vector<int>> divmod(vector<int> a, vector<int> b, int mod) {
  int n = a.size(), m = b.size();
  if (n < m) {
    return make_pair(vector<int>(), a);
  }
  reverse(a.begin(), a.end());
  reverse(b.begin(), b.end());
  vector<int> rb = invert(b, n - m + 1, mod);
  vector<int> d = multiply(a, rb, mod);
  reverse(a.begin(), a.end());
  reverse(b.begin(), b.end());
  while (d.size() > n - m + 1) d.pop_back();
  reverse(d.begin(), d.end());
  vector<int> r = multiply(d, b, mod);
  while (r.size() >= m) r.pop_back();
  for (int i = 0; i < m; i++) {
    r[i] = a[i] - r[i];
    if (r[i] < 0) r[i] += mod;
  }
  return make_pair(d, r);
}
vector<int> chirpz_transform(vector<int> a, int z, int k, int mod) {
  int n = a.size();
  vector<int> x;
  vector<int> y;
  int iz = fpow(z, mod - 2, mod);
  for (int i = 0; i < n; i++) {
    x.push_back((long long)a[i] * fpow(z, (long long)i * i, mod) % mod);
  }
  for (int i = 1 - n; i < k; i++) {
    y.push_back(fpow(iz, (long long)i * i, mod));
  }
  vector<int> r = FFT::multiply(x, y, mod);
  vector<int> res(k);
  for (int i = 0; i < k; i++) {
    res[i] = (long long)r[i + n - 1] * fpow(z, (long long)i * i, mod) % mod;
  }
  return res;
}
}  // namespace FFT
const int mod = 998244353;
int cnt[maxn];
int main() {
  int n = 0;
  cin >> n;
  int x;
  for (int i = 0; i < n; i++) {
    cin >> x;
    cnt[x]++;
  }
  vector<int> vt;
  for (int i = 0; i < maxn; i++) {
    if (cnt[i]) {
      vt.push_back(cnt[i]);
    }
  }
  sort(vt.begin(), vt.end());
  int sl = vt.size();
  queue<vector<int>> q;
  vector<int> c;
  for (int i = 0; i < vt.size(); i++) {
    int x = vt[i];
    for (int j = 0; j <= x; j++) {
      c.push_back(1);
    }
    q.push(c);
  }
  while (q.size() > 1) {
    vector<int> u = q.front();
    q.pop();
    vector<int> v = q.front();
    q.pop();
    q.push(FFT::multiply(u, v, mod));
  }
  vector<int> u = q.front();
  cout << u[n / 2];
  return 0;
}
