#include <bits/stdc++.h>
using namespace std;
const int M = 1e9 + 7;
void __print(int x) { cerr << x; }
void __print(long x) { cerr << x; }
void __print(long long x) { cerr << x; }
void __print(unsigned x) { cerr << x; }
void __print(unsigned long x) { cerr << x; }
void __print(unsigned long long x) { cerr << x; }
void __print(float x) { cerr << x; }
void __print(double x) { cerr << x; }
void __print(long double x) { cerr << x; }
void __print(char x) { cerr << '\'' << x << '\''; }
void __print(const char* x) { cerr << '\"' << x << '\"'; }
void __print(const string& x) { cerr << '\"' << x << '\"'; }
void __print(bool x) { cerr << (x ? "true" : "false"); }
template <typename T, typename V>
void __print(const pair<T, V>& x) {
  cerr << '{';
  __print(x.first);
  cerr << ',';
  __print(x.second);
  cerr << '}';
}
template <typename T>
void __print(const T& x) {
  int f = 0;
  cerr << '{';
  for (auto& i : x) cerr << (f++ ? "," : ""), __print(i);
  cerr << "}";
}
void _print() { cerr << "]\n"; }
template <typename T, typename... V>
void _print(T t, V... v) {
  __print(t);
  if (sizeof...(v)) cerr << ", ";
  _print(v...);
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  string s;
  cin >> s;
  int n = s.size();
  long long res = 0;
  for (int i = 0; i < n; ++i) {
    int cur = 0;
    int q = 0;
    long long ans = 0;
    for (int j = i; j < n; ++j) {
      if (s[j] == ')') {
        --cur;
      } else if (s[j] == '(') {
        ++cur;
      } else {
        ++q;
      }
      if (cur == -1) {
        if (q <= 0) {
          break;
        }
        --q;
        cur = 0;
      }
      if (q > cur) {
        --q;
        ++cur;
      }
      int req = cur;
      if (q >= req) {
        if (!((q - req) % 2)) {
          ++ans;
        }
      }
    }
    res += ans;
  }
  cout << res << "\n";
  return 0;
}
