#include <algorithm>
#include <cstdint>
#include <iostream>
#include <string>
#include <utility>
#include <vector>

namespace {
using std::cin;
using std::cout;
using std::int64_t;
using int128_t = __int128;

const int kP = 998244353, kInv2 = (kP + 1) / 2, kG = 3, kInvG = 332748118;

namespace mod {
inline int Mod(int x) { return x >= kP ? x - kP : x; }
inline void Add(int& x, int y) { x = Mod(x + y); }
inline int Fix(int x) { return x + (x >> 31 & kP); }
inline void Sub(int& x, int y) { x = Fix(x - y); }
inline int Unm(int x) { return x ? kP - x : x; }
inline void Neg(int& x) { x = Unm(x); }

int64_t Pow(int64_t a, int b) {
  int64_t ans = 1;

  while (b) {
    if (b & 1) ans = ans * a % kP;
    a = a * a % kP, b >>= 1;
  }

  return ans;
}

inline int64_t Inv(int64_t a) { return Pow(a, kP - 2); }
}  // namespace mod

namespace poly {
inline int Ceil(int n) {
  if (n == 1) return 1;
  return 1 << (32 - __builtin_clz(n - 1));
}

struct Poly {
  std::vector<int> c;
  int Size() const { return c.size(); }
  void Resize(int n) { c.resize(n); }
  void Reverse() { std::reverse(c.begin(), c.end()); }
  int operator[](int i) const { return c[i]; }
  int& operator[](int i) { return c[i]; }
};

Poly& operator+=(Poly& f, const Poly& g) {
  int n = f.Size(), m = g.Size(), len = std::max(n, m);
  f.Resize(len);
  for (int i = 0; i < m; ++i) mod::Add(f[i], g[i]);
  return f;
}

Poly operator+(Poly f, const Poly& g) { return f += g; }

Poly& operator-=(Poly& f, const Poly& g) {
  int n = f.Size(), m = g.Size(), len = std::max(n, m);
  f.Resize(len);
  for (int i = 0; i < m; ++i) mod::Sub(f[i], g[i]);
  return f;
}

Poly operator-(Poly f, const Poly& g) { return f -= g; }

Poly operator-(Poly f) {
  int n = f.Size();
  for (int i = 0; i < n; ++i) mod::Neg(f[i]);
  return f;
}

Poly& operator*=(Poly& f, int64_t k) {
  int n = f.Size();
  for (int i = 0; i < n; ++i) f[i] = f[i] * k % kP;
  return f;
}

Poly operator*(Poly f, int64_t k) { return f *= k; }

Poly rev;

void InitRev(int n) {
  int m = rev.Size();
  if (m == n) return;
  rev.Resize(n);
  int e = __builtin_ctz(n);

  for (int i = 1; i < n; ++i) {
    rev[i] = (rev[i >> 1] >> 1) | ((i & 1) << (e - 1));
  }
}

Poly w = {{0}};

void InitW(int n, int g) {
  int m = w.Size();
  if (m == n && w[0] == g) return;
  w[0] = g, w.Resize(n);

  for (int i = 1; i < n; i <<= 1) {
    int64_t w_i = mod::Pow(g, (kP - 1) / (i << 1)), w_i_j = 1;
    for (int j = 0; j < i; ++j) w[i | j] = w_i_j, w_i_j = w_i_j * w_i % kP;
  }
}

void Ntt(Poly& f, int type) {
  int n = f.Size();
  InitRev(n);
  InitW(n, type == 1 ? kG : kInvG);

  for (int i = 0; i < n; ++i) {
    if (i < rev[i]) std::swap(f[i], f[rev[i]]);
  }

  for (int i = 1; i < n; i <<= 1) {
    for (int j = 0; j < n; j += (i << 1)) {
      for (int k = 0; k < i; ++k) {
        int x = f[j | k], y = int64_t{f[i | j | k]} * w[i | k] % kP;
        f[j | k] = mod::Mod(x + y), f[i | j | k] = mod::Fix(x - y);
      }
    }
  }

  if (type == -1) {
    int64_t inv = mod::Inv(n);
    for (int i = 0; i < n; ++i) f[i] = f[i] * inv % kP;
  }
}

Poly& operator*=(Poly& f, Poly g) {
  int n = f.Size(), m = g.Size(), len = Ceil(n + m - 1);
  f.Resize(len), g.Resize(len);
  Ntt(f, 1), Ntt(g, 1);
  for (int i = 0; i < len; ++i) f[i] = int64_t{f[i]} * g[i] % kP;
  Ntt(f, -1);
  f.Resize(n + m - 1);
  return f;
}

Poly operator*(Poly f, const Poly& g) { return f *= g; }

Poly Slice(const Poly& f, int l, int r) {
  Poly g;
  g.Resize(r - l + 1);
  for (int i = 0; i <= r - l; ++i) g[i] = f[i + l];
  return g;
}

Poly Inv(Poly f) {
  int n = f.Size(), len = Ceil(n);
  f.Resize(len);
  Poly g = {{static_cast<int>(mod::Inv(f[0]))}};

  for (int w = 2; w <= len; w <<= 1) {
    g = g * 2 - g * g * Slice(f, 0, w - 1);
    g.Resize(w);
  }

  g.Resize(n);
  return g;
}

Poly& operator/=(Poly& f, Poly g) {
  int n = f.Size(), m = g.Size(), len = n - m + 1;
  f.Reverse(), g.Reverse();
  f.Resize(len), g.Resize(len);
  f *= Inv(g);
  f.Resize(len), f.Reverse();
  return f;
}

Poly operator/(Poly f, const Poly& g) { return f /= g; }

Poly Sqrt(Poly f) {
  int n = f.Size(), len = Ceil(n);
  f.Resize(len);
  Poly g = {{1}};

  for (int w = 2; w <= len; w <<= 1) {
    Poly h = g;
    h.Resize(w);
    g = (g * g + Slice(f, 0, w - 1)) * Inv(h) * kInv2;
    g.Resize(w);
  }

  g.Resize(n);
  if (g[0] * 2 > kP) return -g;
  return g;
}

Poly Derivative(const Poly& f) {
  int n = f.Size();
  if (n == 1) return {{0}};
  Poly g;
  g.Resize(n - 1);
  for (int i = 0; i < n - 1; ++i) g[i] = int64_t{f[i + 1]} * (i + 1) % kP;
  return g;
}

Poly inv = {{0, 1}};

void InitInv(int n) {
  int m = inv.Size();
  if (m - 1 >= n) return;
  inv.Resize(n + 1);

  for (int i = m; i <= n; ++i) {
    inv[i] = int64_t{inv[kP % i]} * (kP - kP / i) % kP;
  }
}

Poly Integration(const Poly& f) {
  int n = f.Size();
  InitInv(n);
  Poly g;
  g.Resize(n + 1), g[0] = 0;
  for (int i = 1; i <= n; ++i) g[i] = int64_t{f[i - 1]} * inv[i] % kP;
  return g;
}

Poly Ln(const Poly& f) {
  int n = f.Size();
  Poly g = Integration(Derivative(f) * Inv(f));
  g.Resize(n);
  return g;
}

Poly Exp(Poly f) {
  int n = f.Size(), len = Ceil(n);
  f.Resize(len);
  Poly g = {{1}};

  for (int w = 2; w <= len; w <<= 1) {
    Poly h = g;
    h.Resize(w);
    g -= (Ln(h) - Slice(f, 0, w - 1)) * g;
    g.Resize(w);
  }

  g.Resize(n);
  return g;
}

Poly Pow(Poly f, int k) {
  int n = f.Size(), p = 0;
  while (p < n && f[p] == 0) ++p;
  if (p == n) return f;
  int x = f[p];
  f = Slice(f, p, n - 1) * mod::Inv(x);
  f = Exp(Ln(f) * k);
  Poly g;
  g.Resize(n);
  for (int i = p * k; i < n; ++i) g[i] = f[i - p * k];
  return g * mod::Pow(x, k);
}
}  // namespace poly

using poly::Poly;

const int kMaxN = 2.0e5 + 5;
int n;
int fac[kMaxN], inv_fac[kMaxN], a[kMaxN], b[kMaxN], c[kMaxN];
std::string str;
Poly f = {{1}};

void InitChoose() {
  fac[0] = 1;
  for (int i = 1; i <= n; ++i) fac[i] = int64_t{fac[i - 1]} * i % kP;
  inv_fac[n] = mod::Inv(fac[n]);
  for (int i = n; i >= 1; --i) inv_fac[i - 1] = int64_t{inv_fac[i]} * i % kP;
}
}  // namespace

int main() {
  cin.tie(nullptr);
  std::ios::sync_with_stdio(false);
  cin >> n;
  for (int i = 0; i < n; ++i) cin >> a[i];
  cin >> str, str = std::string(" ").append(str);
  for (int i = 1; i < n; ++i) c[i] = mod::Fix((str[i] == '+' ? 1 : -1) - i);
  InitChoose();

  for (int i = 1; i < n; ++i) {
    int64_t val = 0;
    for (int j = f.Size() - 1; j >= 0; --j) val = (val * i + f[j]) % kP;
    b[i] = (str[i] == '+' ? val : -val), f *= Poly{{c[i], 1}};
  }

  int128_t ans = a[0];
  for (int i = 1; i < n; ++i) ans += int64_t{a[i]} * b[i] % kP * inv_fac[i];
  cout << mod::Fix(ans % kP * fac[n - 1] % kP) << "\n";
  return 0;
}