#include <bits/stdc++.h>
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math")
using namespace std;
const double inf = 1e121;
const double eps = 1e-10;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
long long randint(long long l, long long r) {
  long long out = rng() % (r - l + 1) + l;
  return out >= l ? out : out + r - l + 1;
}
template <typename A, typename B>
string to_string(pair<A, B> p);
template <typename A, typename B, typename C>
string to_string(tuple<A, B, C> p);
template <typename A, typename B, typename C, typename D>
string to_string(tuple<A, B, C, D> p);
string to_string(const string& s) { return '"' + s + '"'; }
string to_string(const char* s) { return to_string((string)s); }
string to_string(bool b) { return (b ? "true" : "false"); }
string to_string(vector<bool> v) {
  bool first = true;
  string res = "{";
  for (long long i = 0; i < static_cast<long long>(v.size()); i++) {
    if (!first) {
      res += ",";
    }
    first = false;
    res += to_string(v[i]);
  }
  res += "}";
  return res;
}
template <size_t N>
string to_string(bitset<N> v) {
  string res = "";
  for (size_t i = 0; i < N; i++) {
    res += static_cast<char>('0' + v[i]);
  }
  return res;
}
template <typename A>
string to_string(A v) {
  bool first = true;
  string res = "{";
  for (const auto& x : v) {
    if (!first) {
      res += ",";
    }
    first = false;
    res += to_string(x);
  }
  res += "}";
  return res;
}
template <typename A, typename B>
string to_string(pair<A, B> p) {
  return "(" + to_string(p.first) + "," + to_string(p.second) + ")";
}
template <typename A, typename B, typename C>
string to_string(tuple<A, B, C> p) {
  return "(" + to_string(get<0>(p)) + "," + to_string(get<1>(p)) + "," +
         to_string(get<2>(p)) + ")";
}
template <typename A, typename B, typename C, typename D>
string to_string(tuple<A, B, C, D> p) {
  return "(" + to_string(get<0>(p)) + "," + to_string(get<1>(p)) + "," +
         to_string(get<2>(p)) + "," + to_string(get<3>(p)) + ")";
}
template <typename A, typename B, typename C, typename D, typename E>
string to_string(tuple<A, B, C, D, E> p) {
  return "(" + to_string(get<0>(p)) + "," + to_string(get<1>(p)) + "," +
         to_string(get<2>(p)) + "," + to_string(get<3>(p)) + "," +
         to_string(get<4>(p)) + ")";
}
void debug_out() { cerr << endl; }
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
  cerr << " " << to_string(H);
  debug_out(T...);
}
const long long INF = 0x3f3f3f3f3f3f3f3fll;
template <typename T>
typename enable_if<!is_integral<T>::value, void>::type read(T& x) {
  cin >> x;
}
long long read() {
  char c;
  long long out = 0, f = 1;
  for (c = getchar(); !isdigit(c) && c != '-'; c = getchar())
    ;
  if (c == '-') {
    f = -1;
    c = getchar();
  }
  for (; isdigit(c); c = getchar()) out = (out << 3) + (out << 1) + c - '0';
  return out * f;
}
template <typename T>
typename enable_if<is_integral<T>::value, T>::type read(T& x) {
  char c;
  T f = 1;
  x = 0;
  for (c = getchar(); !isdigit(c) && c != '-'; c = getchar())
    ;
  if (c == '-') {
    f = -1;
    c = getchar();
  }
  for (; isdigit(c); c = getchar()) x = (x << 3) + (x << 1) + c - '0';
  return x *= f;
}
char read(char& x) {
  for (x = getchar(); isspace(x); x = getchar())
    ;
  return x;
}
double read(double& x) {
  scanf("%lf", &x);
  return x;
}
long double read(long double& x) {
  scanf("%Lf", &x);
  return x;
}
template <typename T>
typename enable_if<!is_integral<T>::value, void>::type write(const T& x) {
  cout << x;
}
template <typename T>
typename enable_if<is_integral<T>::value, void>::type write(const T& x) {
  if (x < 0) {
    putchar('-');
    write(-x);
    return;
  }
  if (x > 9) write(x / 10);
  putchar(x % 10 + '0');
}
void write(const char& x) { putchar(x); }
void write(const double& x) { printf("%.10lf", x); }
void write(const long double& x) { printf("%.10Lf", x); }
template <typename T, typename... Args>
void read(T& x, Args&... args) {
  read(x);
  read(args...);
}
template <
    typename OutputIt,
    typename = typename enable_if<
        is_same<output_iterator_tag,
                typename iterator_traits<OutputIt>::iterator_category>::value ||
        (is_base_of<forward_iterator_tag, typename iterator_traits<OutputIt>::
                                              iterator_category>::value &&
         !is_const<OutputIt>::value)>::type>
void read(OutputIt __first, OutputIt __last) {
  for (; __first != __last; ++__first) read(*__first);
}
template <
    typename InputIt,
    typename = typename enable_if<is_base_of<
        input_iterator_tag,
        typename iterator_traits<InputIt>::iterator_category>::value>::type>
void wts(InputIt __first, InputIt __last) {
  bool isFirst = true;
  for (; __first != __last; ++__first) {
    if (isFirst)
      isFirst = false;
    else
      putchar(' ');
    write(*__first);
  }
  putchar('\n');
}
template <
    typename InputIt,
    typename = typename enable_if<is_base_of<
        input_iterator_tag,
        typename iterator_traits<InputIt>::iterator_category>::value>::type>
void wtb(InputIt __first, InputIt __last) {
  for (; __first != __last; ++__first) {
    write(*__first);
    putchar('\n');
  }
}
template <typename T>
void wts(const T& x) {
  write(x);
  putchar(' ');
}
template <typename T>
void wtb(const T& x) {
  write(x);
  putchar('\n');
}
template <typename T>
void wte(const T& x) {
  write(x);
  exit(0);
}
template <typename T, typename... Args>
void wts(const T& x, Args... args) {
  wts(x);
  wts(args...);
}
template <typename T, typename... Args>
void wtb(const T& x, Args... args) {
  wts(x);
  wtb(args...);
}
template <typename T, typename... Args>
void wte(const T& x, Args... args) {
  wts(x);
  wte(args...);
}
template <typename T>
inline bool up(T& x, const T& y) {
  return x < y ? x = y, 1 : 0;
}
template <typename T>
inline bool dn(T& x, const T& y) {
  return y < x ? x = y, 1 : 0;
}
template <typename T>
inline bool inRange(const T& x, const T& l, const T& r) {
  return !(x < l) && !(r < x);
}
template <typename valueType, typename tagType>
class segmentTreeNode {
 public:
  long long id, left, right;
  valueType val;
  tagType tag;
};
template <typename valueType, typename tagType,
          valueType (*merge)(valueType, valueType),
          void (*update)(segmentTreeNode<valueType, tagType>&, tagType)>
class segmentTree {
 private:
  std::vector<segmentTreeNode<valueType, tagType>> nodes;
  long long leftRange, rightRange;
  valueType valueZero;
  tagType tagZero;
  void pushup(long long cur) {
    nodes[cur].val = merge(nodes[cur << 1].val, nodes[cur << 1 | 1].val);
  }
  void pushdown(long long cur) {
    update(nodes[cur << 1], nodes[cur].tag);
    update(nodes[cur << 1 | 1], nodes[cur].tag);
    nodes[cur].tag = tagZero;
  }
  void build(long long cur, long long l, long long r,
             const std::vector<valueType>& initValue) {
    nodes[cur].id = cur;
    nodes[cur].left = l;
    nodes[cur].right = r;
    nodes[cur].tag = tagZero;
    if (l == r - 1)
      nodes[cur].val = initValue[l - leftRange];
    else {
      build(cur << 1, l, (l + r) >> 1, initValue);
      build(cur << 1 | 1, (l + r) >> 1, r, initValue);
      pushup(cur);
    }
  }
  void init(const std::vector<valueType>& _initValue,
            const valueType& _valueZero, const tagType& _tagZero) {
    valueZero = _valueZero;
    tagZero = _tagZero;
    nodes.resize((rightRange - leftRange) << 2);
    build(1, leftRange, rightRange, _initValue);
  }
  void modify(long long cur, long long l, long long r, long long L, long long R,
              const tagType& tag) {
    if (l >= R || r <= L) return;
    if (L <= l && r <= R)
      update(nodes[cur], tag);
    else {
      pushdown(cur);
      modify(cur << 1, l, (l + r) >> 1, L, R, tag);
      modify(cur << 1 | 1, (l + r) >> 1, r, L, R, tag);
      pushup(cur);
    }
  }
  valueType query(long long cur, long long l, long long r, long long L,
                  long long R) {
    if (l >= R || r <= L) return valueZero;
    if (L <= l && r <= R) return nodes[cur].val;
    pushdown(cur);
    return merge(query(cur << 1, l, (l + r) >> 1, L, R),
                 query(cur << 1 | 1, (l + r) >> 1, r, L, R));
  }

 public:
  segmentTree() {}
  segmentTree(long long _leftRange, long long _rightRange,
              const std::vector<valueType>& _initValue,
              const valueType& _valueZero, const tagType& _tagZero) {
    leftRange = _leftRange;
    rightRange = _rightRange;
    init(_initValue, _valueZero, _tagZero);
  }
  segmentTree(long long size, const std::vector<valueType>& _initValue,
              const valueType& _valueZero, const tagType& _tagZero) {
    leftRange = 1;
    rightRange = size + 1;
    init(_initValue, _valueZero, _tagZero);
  }
  void modify(long long l, long long r, const tagType& tag) {
    modify(1, leftRange, rightRange, l, r, tag);
  }
  void modify(long long p, const tagType& tag) { modify(p, p + 1, tag); }
  valueType query(long long l, long long r) {
    return query(1, leftRange, rightRange, l, r);
  }
  valueType query(long long p) { return query(p, p + 1); }
};
class maxFlow {
 private:
  std::queue<long long> q;
  std::vector<long long> head, cur, nxt, to, dep;
  std::vector<long long> cap;

 public:
  maxFlow(long long _n = 0) { init(_n); }
  void init(long long _n) {
    head.clear();
    head.resize(_n + 1, 0);
    nxt.resize(2);
    to.resize(2);
    cap.resize(2);
  }
  void init() { init(head.size() - 1); }
  void add(long long u, long long v, long long w) {
    nxt.push_back(head[u]);
    head[u] = to.size();
    to.push_back(v);
    cap.push_back(w);
  }
  void Add(long long u, long long v, long long w) {
    add(u, v, w);
    add(v, u, 0);
  }
  void del(long long x) { cap[x << 1] = cap[x << 1 | 1] = 0; }
  bool bfs(long long s, long long t) {
    dep.clear();
    dep.resize(head.size(), -1);
    dep[s] = 0;
    q.push(s);
    while (!q.empty()) {
      long long u = q.front();
      q.pop();
      for (long long i = head[u]; i; i = nxt[i]) {
        long long v = to[i];
        long long w = cap[i];
        if (w > 0 && dep[v] == -1) {
          dep[v] = dep[u] + 1;
          q.push(v);
        }
      }
    }
    return ~dep[t];
  }
  long long dfs(long long u, long long flow, long long t) {
    if (dep[u] == dep[t]) return u == t ? flow : 0;
    long long out = 0;
    for (long long& i = cur[u]; i; i = nxt[i]) {
      long long v = to[i];
      long long w = cap[i];
      if (w > 0 && dep[v] == dep[u] + 1) {
        long long f = dfs(v, std::min(w, flow - out), t);
        cap[i] -= f;
        cap[i ^ 1] += f;
        out += f;
        if (out == flow) return out;
      }
    }
    return out;
  }
  long long maxflow(long long s, long long t) {
    long long out = 0;
    while (bfs(s, t)) {
      cur = head;
      out += dfs(s, 0x7fffffffffffffffll, t);
    }
    return out;
  }
  long long getflow(long long x) const { return cap[x << 1 | 1]; }
};
struct customHash {
  static uint64_t splitmix64(uint64_t x) {
    x += 0x9e3779b97f4a7c15;
    x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
    x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
    return x ^ (x >> 31);
  }
  size_t operator()(uint64_t x) const {
    static const uint64_t FIXED_RANDOM = rng();
    return splitmix64(x + FIXED_RANDOM);
  }
};
const long long mod = (1e9 + 7, 998244353);
long long n;
string s;
vector<vector<long long>> f, g;
signed main() {
  cin >> s;
  n = s.size();
  f.resize(n + 1, vector<long long>(n + 2, 0));
  g.resize(n + 1, vector<long long>(n + 2, 0));
  f[0][0] = g[n][0] = 1;
  for (long long i = (1), iend = (n); i <= iend; ++i) {
    for (long long j = (0), jend = (n); j <= jend; ++j) {
      if (s[i - 1] == ')')
        f[i][j] = f[i - 1][j];
      else if (s[i - 1] == '(' && j)
        f[i][j] = f[i - 1][j - 1];
      else if (s[i - 1] == '?' && j)
        f[i][j] = (f[i - 1][j] + f[i - 1][j - 1]) % mod;
      else if (s[i - 1] == '?' && !j)
        f[i][j] = f[i - 1][j];
    }
  }
  for (long long i = (n), iend = (1); i >= iend; --i) {
    for (long long j = (0), jend = (n); j <= jend; ++j) {
      if (s[i - 1] == '(')
        g[i - 1][j] = g[i][j];
      else if (s[i - 1] == ')' && j)
        g[i - 1][j] = g[i][j - 1];
      else if (s[i - 1] == '?' && j)
        g[i - 1][j] = (g[i][j] + g[i][j - 1]) % mod;
      else if (s[i - 1] == '?' && !j)
        g[i - 1][j] = g[i][j];
    }
  }
  long long ans = 0;
  for (long long i = (1), iend = (n - 1); i <= iend; ++i)
    for (long long j = (1), jend = (n); j <= jend; ++j)
      ans = (ans + j * f[i][j] % mod * g[i][j]) % mod;
  cout << ans;
  return 0;
}

### Prompt

Please provide a CPP coded solution to the problem described below:

This is the easy version of this problem. The only difference is the limit of n - the length of the input string. In this version, 1 ≤ n ≤ 2000. The hard version of this challenge is not offered in the round for the second division. 

Let's define a correct bracket sequence and its depth as follow:

  * An empty string is a correct bracket sequence with depth 0. 
  * If "s" is a correct bracket sequence with depth d then "(s)" is a correct bracket sequence with depth d + 1. 
  * If "s" and "t" are both correct bracket sequences then their concatenation "st" is a correct bracket sequence with depth equal to the maximum depth of s and t. 



For a (not necessarily correct) bracket sequence s, we define its depth as the maximum depth of any correct bracket sequence induced by removing some characters from s (possibly zero). For example: the bracket sequence s = "())(())" has depth 2, because by removing the third character we obtain a correct bracket sequence "()(())" with depth 2.

Given a string a consists of only characters '(', ')' and '?'. Consider all (not necessarily correct) bracket sequences obtained by replacing all characters '?' in a by either '(' or ')'. Calculate the sum of all the depths of all these bracket sequences. As this number can be large, find it modulo 998244353.

Hacks in this problem in the first division can be done only if easy and hard versions of this problem was solved.

Input

The only line contains a non-empty string consist of only '(', ')' and '?'. The length of the string is at most 2000.

Output

Print the answer modulo 998244353 in a single line.

Examples

Input


??


Output


1


Input


(?(?))


Output


9

Note

In the first test case, we can obtain 4 bracket sequences by replacing all characters '?' with either '(' or ')':

  * "((". Its depth is 0; 
  * "))". Its depth is 0; 
  * ")(". Its depth is 0; 
  * "()". Its depth is 1. 



So, the answer is 1 = 0 + 0 + 0 + 1.

In the second test case, we can obtain 4 bracket sequences by replacing all characters '?' with either '(' or ')':

  * "(((())". Its depth is 2; 
  * "()()))". Its depth is 2; 
  * "((()))". Its depth is 3; 
  * "()(())". Its depth is 2. 



So, the answer is 9 = 2 + 2 + 3 + 2.

### Response

```cpp
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math")
using namespace std;
const double inf = 1e121;
const double eps = 1e-10;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
long long randint(long long l, long long r) {
  long long out = rng() % (r - l + 1) + l;
  return out >= l ? out : out + r - l + 1;
}
template <typename A, typename B>
string to_string(pair<A, B> p);
template <typename A, typename B, typename C>
string to_string(tuple<A, B, C> p);
template <typename A, typename B, typename C, typename D>
string to_string(tuple<A, B, C, D> p);
string to_string(const string& s) { return '"' + s + '"'; }
string to_string(const char* s) { return to_string((string)s); }
string to_string(bool b) { return (b ? "true" : "false"); }
string to_string(vector<bool> v) {
  bool first = true;
  string res = "{";
  for (long long i = 0; i < static_cast<long long>(v.size()); i++) {
    if (!first) {
      res += ",";
    }
    first = false;
    res += to_string(v[i]);
  }
  res += "}";
  return res;
}
template <size_t N>
string to_string(bitset<N> v) {
  string res = "";
  for (size_t i = 0; i < N; i++) {
    res += static_cast<char>('0' + v[i]);
  }
  return res;
}
template <typename A>
string to_string(A v) {
  bool first = true;
  string res = "{";
  for (const auto& x : v) {
    if (!first) {
      res += ",";
    }
    first = false;
    res += to_string(x);
  }
  res += "}";
  return res;
}
template <typename A, typename B>
string to_string(pair<A, B> p) {
  return "(" + to_string(p.first) + "," + to_string(p.second) + ")";
}
template <typename A, typename B, typename C>
string to_string(tuple<A, B, C> p) {
  return "(" + to_string(get<0>(p)) + "," + to_string(get<1>(p)) + "," +
         to_string(get<2>(p)) + ")";
}
template <typename A, typename B, typename C, typename D>
string to_string(tuple<A, B, C, D> p) {
  return "(" + to_string(get<0>(p)) + "," + to_string(get<1>(p)) + "," +
         to_string(get<2>(p)) + "," + to_string(get<3>(p)) + ")";
}
template <typename A, typename B, typename C, typename D, typename E>
string to_string(tuple<A, B, C, D, E> p) {
  return "(" + to_string(get<0>(p)) + "," + to_string(get<1>(p)) + "," +
         to_string(get<2>(p)) + "," + to_string(get<3>(p)) + "," +
         to_string(get<4>(p)) + ")";
}
void debug_out() { cerr << endl; }
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
  cerr << " " << to_string(H);
  debug_out(T...);
}
const long long INF = 0x3f3f3f3f3f3f3f3fll;
template <typename T>
typename enable_if<!is_integral<T>::value, void>::type read(T& x) {
  cin >> x;
}
long long read() {
  char c;
  long long out = 0, f = 1;
  for (c = getchar(); !isdigit(c) && c != '-'; c = getchar())
    ;
  if (c == '-') {
    f = -1;
    c = getchar();
  }
  for (; isdigit(c); c = getchar()) out = (out << 3) + (out << 1) + c - '0';
  return out * f;
}
template <typename T>
typename enable_if<is_integral<T>::value, T>::type read(T& x) {
  char c;
  T f = 1;
  x = 0;
  for (c = getchar(); !isdigit(c) && c != '-'; c = getchar())
    ;
  if (c == '-') {
    f = -1;
    c = getchar();
  }
  for (; isdigit(c); c = getchar()) x = (x << 3) + (x << 1) + c - '0';
  return x *= f;
}
char read(char& x) {
  for (x = getchar(); isspace(x); x = getchar())
    ;
  return x;
}
double read(double& x) {
  scanf("%lf", &x);
  return x;
}
long double read(long double& x) {
  scanf("%Lf", &x);
  return x;
}
template <typename T>
typename enable_if<!is_integral<T>::value, void>::type write(const T& x) {
  cout << x;
}
template <typename T>
typename enable_if<is_integral<T>::value, void>::type write(const T& x) {
  if (x < 0) {
    putchar('-');
    write(-x);
    return;
  }
  if (x > 9) write(x / 10);
  putchar(x % 10 + '0');
}
void write(const char& x) { putchar(x); }
void write(const double& x) { printf("%.10lf", x); }
void write(const long double& x) { printf("%.10Lf", x); }
template <typename T, typename... Args>
void read(T& x, Args&... args) {
  read(x);
  read(args...);
}
template <
    typename OutputIt,
    typename = typename enable_if<
        is_same<output_iterator_tag,
                typename iterator_traits<OutputIt>::iterator_category>::value ||
        (is_base_of<forward_iterator_tag, typename iterator_traits<OutputIt>::
                                              iterator_category>::value &&
         !is_const<OutputIt>::value)>::type>
void read(OutputIt __first, OutputIt __last) {
  for (; __first != __last; ++__first) read(*__first);
}
template <
    typename InputIt,
    typename = typename enable_if<is_base_of<
        input_iterator_tag,
        typename iterator_traits<InputIt>::iterator_category>::value>::type>
void wts(InputIt __first, InputIt __last) {
  bool isFirst = true;
  for (; __first != __last; ++__first) {
    if (isFirst)
      isFirst = false;
    else
      putchar(' ');
    write(*__first);
  }
  putchar('\n');
}
template <
    typename InputIt,
    typename = typename enable_if<is_base_of<
        input_iterator_tag,
        typename iterator_traits<InputIt>::iterator_category>::value>::type>
void wtb(InputIt __first, InputIt __last) {
  for (; __first != __last; ++__first) {
    write(*__first);
    putchar('\n');
  }
}
template <typename T>
void wts(const T& x) {
  write(x);
  putchar(' ');
}
template <typename T>
void wtb(const T& x) {
  write(x);
  putchar('\n');
}
template <typename T>
void wte(const T& x) {
  write(x);
  exit(0);
}
template <typename T, typename... Args>
void wts(const T& x, Args... args) {
  wts(x);
  wts(args...);
}
template <typename T, typename... Args>
void wtb(const T& x, Args... args) {
  wts(x);
  wtb(args...);
}
template <typename T, typename... Args>
void wte(const T& x, Args... args) {
  wts(x);
  wte(args...);
}
template <typename T>
inline bool up(T& x, const T& y) {
  return x < y ? x = y, 1 : 0;
}
template <typename T>
inline bool dn(T& x, const T& y) {
  return y < x ? x = y, 1 : 0;
}
template <typename T>
inline bool inRange(const T& x, const T& l, const T& r) {
  return !(x < l) && !(r < x);
}
template <typename valueType, typename tagType>
class segmentTreeNode {
 public:
  long long id, left, right;
  valueType val;
  tagType tag;
};
template <typename valueType, typename tagType,
          valueType (*merge)(valueType, valueType),
          void (*update)(segmentTreeNode<valueType, tagType>&, tagType)>
class segmentTree {
 private:
  std::vector<segmentTreeNode<valueType, tagType>> nodes;
  long long leftRange, rightRange;
  valueType valueZero;
  tagType tagZero;
  void pushup(long long cur) {
    nodes[cur].val = merge(nodes[cur << 1].val, nodes[cur << 1 | 1].val);
  }
  void pushdown(long long cur) {
    update(nodes[cur << 1], nodes[cur].tag);
    update(nodes[cur << 1 | 1], nodes[cur].tag);
    nodes[cur].tag = tagZero;
  }
  void build(long long cur, long long l, long long r,
             const std::vector<valueType>& initValue) {
    nodes[cur].id = cur;
    nodes[cur].left = l;
    nodes[cur].right = r;
    nodes[cur].tag = tagZero;
    if (l == r - 1)
      nodes[cur].val = initValue[l - leftRange];
    else {
      build(cur << 1, l, (l + r) >> 1, initValue);
      build(cur << 1 | 1, (l + r) >> 1, r, initValue);
      pushup(cur);
    }
  }
  void init(const std::vector<valueType>& _initValue,
            const valueType& _valueZero, const tagType& _tagZero) {
    valueZero = _valueZero;
    tagZero = _tagZero;
    nodes.resize((rightRange - leftRange) << 2);
    build(1, leftRange, rightRange, _initValue);
  }
  void modify(long long cur, long long l, long long r, long long L, long long R,
              const tagType& tag) {
    if (l >= R || r <= L) return;
    if (L <= l && r <= R)
      update(nodes[cur], tag);
    else {
      pushdown(cur);
      modify(cur << 1, l, (l + r) >> 1, L, R, tag);
      modify(cur << 1 | 1, (l + r) >> 1, r, L, R, tag);
      pushup(cur);
    }
  }
  valueType query(long long cur, long long l, long long r, long long L,
                  long long R) {
    if (l >= R || r <= L) return valueZero;
    if (L <= l && r <= R) return nodes[cur].val;
    pushdown(cur);
    return merge(query(cur << 1, l, (l + r) >> 1, L, R),
                 query(cur << 1 | 1, (l + r) >> 1, r, L, R));
  }

 public:
  segmentTree() {}
  segmentTree(long long _leftRange, long long _rightRange,
              const std::vector<valueType>& _initValue,
              const valueType& _valueZero, const tagType& _tagZero) {
    leftRange = _leftRange;
    rightRange = _rightRange;
    init(_initValue, _valueZero, _tagZero);
  }
  segmentTree(long long size, const std::vector<valueType>& _initValue,
              const valueType& _valueZero, const tagType& _tagZero) {
    leftRange = 1;
    rightRange = size + 1;
    init(_initValue, _valueZero, _tagZero);
  }
  void modify(long long l, long long r, const tagType& tag) {
    modify(1, leftRange, rightRange, l, r, tag);
  }
  void modify(long long p, const tagType& tag) { modify(p, p + 1, tag); }
  valueType query(long long l, long long r) {
    return query(1, leftRange, rightRange, l, r);
  }
  valueType query(long long p) { return query(p, p + 1); }
};
class maxFlow {
 private:
  std::queue<long long> q;
  std::vector<long long> head, cur, nxt, to, dep;
  std::vector<long long> cap;

 public:
  maxFlow(long long _n = 0) { init(_n); }
  void init(long long _n) {
    head.clear();
    head.resize(_n + 1, 0);
    nxt.resize(2);
    to.resize(2);
    cap.resize(2);
  }
  void init() { init(head.size() - 1); }
  void add(long long u, long long v, long long w) {
    nxt.push_back(head[u]);
    head[u] = to.size();
    to.push_back(v);
    cap.push_back(w);
  }
  void Add(long long u, long long v, long long w) {
    add(u, v, w);
    add(v, u, 0);
  }
  void del(long long x) { cap[x << 1] = cap[x << 1 | 1] = 0; }
  bool bfs(long long s, long long t) {
    dep.clear();
    dep.resize(head.size(), -1);
    dep[s] = 0;
    q.push(s);
    while (!q.empty()) {
      long long u = q.front();
      q.pop();
      for (long long i = head[u]; i; i = nxt[i]) {
        long long v = to[i];
        long long w = cap[i];
        if (w > 0 && dep[v] == -1) {
          dep[v] = dep[u] + 1;
          q.push(v);
        }
      }
    }
    return ~dep[t];
  }
  long long dfs(long long u, long long flow, long long t) {
    if (dep[u] == dep[t]) return u == t ? flow : 0;
    long long out = 0;
    for (long long& i = cur[u]; i; i = nxt[i]) {
      long long v = to[i];
      long long w = cap[i];
      if (w > 0 && dep[v] == dep[u] + 1) {
        long long f = dfs(v, std::min(w, flow - out), t);
        cap[i] -= f;
        cap[i ^ 1] += f;
        out += f;
        if (out == flow) return out;
      }
    }
    return out;
  }
  long long maxflow(long long s, long long t) {
    long long out = 0;
    while (bfs(s, t)) {
      cur = head;
      out += dfs(s, 0x7fffffffffffffffll, t);
    }
    return out;
  }
  long long getflow(long long x) const { return cap[x << 1 | 1]; }
};
struct customHash {
  static uint64_t splitmix64(uint64_t x) {
    x += 0x9e3779b97f4a7c15;
    x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
    x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
    return x ^ (x >> 31);
  }
  size_t operator()(uint64_t x) const {
    static const uint64_t FIXED_RANDOM = rng();
    return splitmix64(x + FIXED_RANDOM);
  }
};
const long long mod = (1e9 + 7, 998244353);
long long n;
string s;
vector<vector<long long>> f, g;
signed main() {
  cin >> s;
  n = s.size();
  f.resize(n + 1, vector<long long>(n + 2, 0));
  g.resize(n + 1, vector<long long>(n + 2, 0));
  f[0][0] = g[n][0] = 1;
  for (long long i = (1), iend = (n); i <= iend; ++i) {
    for (long long j = (0), jend = (n); j <= jend; ++j) {
      if (s[i - 1] == ')')
        f[i][j] = f[i - 1][j];
      else if (s[i - 1] == '(' && j)
        f[i][j] = f[i - 1][j - 1];
      else if (s[i - 1] == '?' && j)
        f[i][j] = (f[i - 1][j] + f[i - 1][j - 1]) % mod;
      else if (s[i - 1] == '?' && !j)
        f[i][j] = f[i - 1][j];
    }
  }
  for (long long i = (n), iend = (1); i >= iend; --i) {
    for (long long j = (0), jend = (n); j <= jend; ++j) {
      if (s[i - 1] == '(')
        g[i - 1][j] = g[i][j];
      else if (s[i - 1] == ')' && j)
        g[i - 1][j] = g[i][j - 1];
      else if (s[i - 1] == '?' && j)
        g[i - 1][j] = (g[i][j] + g[i][j - 1]) % mod;
      else if (s[i - 1] == '?' && !j)
        g[i - 1][j] = g[i][j];
    }
  }
  long long ans = 0;
  for (long long i = (1), iend = (n - 1); i <= iend; ++i)
    for (long long j = (1), jend = (n); j <= jend; ++j)
      ans = (ans + j * f[i][j] % mod * g[i][j]) % mod;
  cout << ans;
  return 0;
}

```