Problem: As Will is stuck in the Upside Down, he can still communicate with his mom, Joyce, through the Christmas lights (he can turn them on and off with his mind). He can't directly tell his mom where he is, because the monster that took him to the Upside Down will know and relocate him. 

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Thus, he came up with a puzzle to tell his mom his coordinates. His coordinates are the answer to the following problem.

A string consisting only of parentheses ('(' and ')') is called a bracket sequence. Some bracket sequence are called correct bracket sequences. More formally:

  * Empty string is a correct bracket sequence. 
  * if s is a correct bracket sequence, then (s) is also a correct bracket sequence. 
  * if s and t are correct bracket sequences, then st (concatenation of s and t) is also a correct bracket sequence. 



A string consisting of parentheses and question marks ('?') is called pretty if and only if there's a way to replace each question mark with either '(' or ')' such that the resulting string is a non-empty correct bracket sequence.

Will gave his mom a string s consisting of parentheses and question marks (using Morse code through the lights) and his coordinates are the number of pairs of integers (l, r) such that 1 ≤ l ≤ r ≤ |s| and the string slsl + 1... sr is pretty, where si is i-th character of s.

Joyce doesn't know anything about bracket sequences, so she asked for your help.

Input

The first and only line of input contains string s, consisting only of characters '(', ')' and '?' (2 ≤ |s| ≤ 5000).

Output

Print the answer to Will's puzzle in the first and only line of output.

Examples

Input

((?))


Output

4


Input

??()??


Output

7

Note

For the first sample testcase, the pretty substrings of s are:

  1. "(?" which can be transformed to "()". 
  2. "?)" which can be transformed to "()". 
  3. "((?)" which can be transformed to "(())". 
  4. "(?))" which can be transformed to "(())". 



For the second sample testcase, the pretty substrings of s are:

  1. "??" which can be transformed to "()". 
  2. "()". 
  3. "??()" which can be transformed to "()()". 
  4. "?()?" which can be transformed to "(())". 
  5. "??" which can be transformed to "()". 
  6. "()??" which can be transformed to "()()". 
  7. "??()??" which can be transformed to "()()()". 

Solution (in CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
void Print(int _x) { printf("%d\n", _x); }
void Print(long long _x) { printf("%I64d\n", _x); }
template <typename T>
void Print(T _a[], int _s, int _t) {
  for (int i = _s; i <= _t; i++) cout << _a[i] << " ";
  cout << endl;
}
struct InputReader {
  static const int bs = 100000;
  char buf[bs];
  int p;
  inline InputReader() : p(bs) {}
  inline void Flush() {
    p = 0;
    fread(buf, 1, bs, stdin);
  }
  inline char C() {
    if (p >= bs) Flush();
    return buf[p++];
  }
  inline int Getnum() {
    char ch = C();
    while (ch < '0' || ch > '9') ch = C();
    return (int)(ch - '0');
  }
  inline int operator()() {
    int ans = 0;
    char ch = C();
    int fu = 1;
    while (ch < '0' || ch > '9') {
      if (ch == '-') fu = -1;
      ch = C();
    }
    while (ch >= '0' && ch <= '9') {
      ans *= 10;
      ans += ch - '0';
      ch = C();
    }
    return ans * fu;
  }
  inline long long Readll() {
    long long ans = 0LL;
    char ch = Getnum() + '0';
    while (ch >= '0' && ch <= '9') {
      ans *= 10LL;
      ans += ch - '0';
      ch = C();
    }
    return ans;
  }
  inline void Readstring(string &x) {
    x.clear();
    char ch = C();
    while (!isdigit(ch) && !isalpha(ch) && ch != '(' && ch != ')' && ch != '?')
      ch = C();
    int p = 0;
    while (isdigit(ch) || isalpha(ch) || ch == '(' || ch == ')' || ch == '?') {
      x += ch;
      ch = C();
      p++;
    }
    x[p] = '\0';
  }
  inline char Specialread() {
    char ch = C();
    while (ch != '+' && ch != '?') ch = C();
    return ch;
  }
} In;
inline void Read(int &x) { x = In(); }
inline void Read(int &x, int &y) {
  x = In();
  y = In();
}
inline void Read(int &x1, int &x2, int &x3) {
  x1 = In();
  x2 = In();
  x3 = In();
}
inline void Read(int &x1, int &x2, int &x3, int &x4) {
  x1 = In();
  x2 = In();
  x3 = In();
  x4 = In();
}
inline void Read(long long &x) { x = In.Readll(); }
clock_t _starttime, _endtime;
inline void FILEIO() {}
inline void END() { exit(0); }
int n;
int s[5010];
int Solve() {
  int ans = 0;
  for (int(i) = 1; (i) <= (n); (i)++) {
    int maxneed, minneed;
    int tans;
    maxneed = minneed = tans = 0;
    for (int(j) = (i); (j) <= (n); (j)++) {
      if (s[j] == 1) {
        minneed++;
        maxneed++;
      }
      if (s[j] == 2) {
        if (maxneed == 0) break;
        minneed--;
        if (minneed < 0) minneed = 0;
        ;
        maxneed--;
        if (maxneed < 0) maxneed = 0;
        ;
      }
      if (s[j] == 3) {
        minneed--;
        if (minneed < 0) minneed = 0;
        ;
        maxneed++;
      }
      if (minneed == 0 && (j - i + 1) % 2 == 0) {
        tans++;
      }
    }
    ans += tans;
  }
  return ans;
}
int main() {
  FILEIO();
  string ss;
  In.Readstring(ss);
  n = ss.length();
  for (int(i) = 0; (i) < (n); (i)++) {
    if (ss[i] == '(') s[i + 1] = 1;
    if (ss[i] == ')') s[i + 1] = 2;
    if (ss[i] == '?') s[i + 1] = 3;
  }
  int ans = Solve();
  printf("%d\n", ans);
  END();
}