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.  [Image] 

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 s_{l}s_{l} + 1... s_{r} is pretty, where s_{i} 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:  "(?" which can be transformed to "()".  "?)" which can be transformed to "()".  "((?)" which can be transformed to "(())".  "(?))" which can be transformed to "(())".  

For the second sample testcase, the pretty substrings of s are:  "??" which can be transformed to "()".  "()".  "??()" which can be transformed to "()()".  "?()?" which can be transformed to "(())".  "??" which can be transformed to "()".  "()??" which can be transformed to "()()".  "??()??" which can be transformed to "()()()".

```python

USER_FILENAME = "<user_code>"
import sys, json, builtins
import math, heapq, bisect, itertools, functools, collections, statistics, fractions, decimal, operator, array, random, re, string, os, pathlib
try:
    import resource as _res
except Exception:
    _res = None
from collections import Counter, defaultdict, deque, OrderedDict
from functools import lru_cache, reduce
from itertools import accumulate, permutations, combinations, product
from math import gcd, ceil, floor, sqrt
from decimal import Decimal
try:
    from typing import *
except Exception:
    pass
try:
    sys.setrecursionlimit(1_000_000)
except Exception:
    pass
try:
    import site as _site
    try:
        _sys_sites = _site.getsitepackages() if hasattr(_site, "getsitepackages") else []
        for _p in _sys_sites:
            if _p and _p not in sys.path:
                sys.path.append(_p)
    except Exception:
        pass
    try:
        _usp = _site.getusersitepackages()
        if isinstance(_usp, str):
            _usp = [_usp]
        for _p in _usp:
            if _p and _p not in sys.path:
                sys.path.append(_p)
    except Exception:
        pass
except Exception:
    pass

ns = {"__name__": "__main__"}
for _k, _v in list(globals().items()):
    if not _k.startswith("_"):
        ns[_k] = _v
_CODE = "s=input()\n\na=0\nl=len(s)\nfor i in range(l):\n    k=0\n    m=0\n    for j in range(i,l):\n        m+=s[j]=='('\n        m-=s[j]==')'\n        k+=s[j]=='?'\n        if m+k<0 :\n            break\n        if k>m:\n            m,k=k,m\n        if m==k:\n            a=a+1\nprint(a)            \n"
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

```

Measured memory_bytes: 13005