#include <bits/stdc++.h>
using namespace std;
int dp[5005][5005];
string s;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cin >> s;
  memset(dp, -1, sizeof dp);
  int ans = 0;
  for (int i = 0; i < s.size(); i++) {
    int can_rev = 0;
    int cur = 0;
    for (int j = i; j < s.size(); j++) {
      if (cur == 0) ans++;
      if (s[j] == '(') {
        cur++;
      } else if (s[j] == ')') {
        cur--;
        if (cur < 0) {
          if (can_rev == 0) break;
          can_rev--;
          cur += 2;
        }
      } else {
        if (cur > 0) {
          cur--;
          can_rev++;
        } else {
          cur++;
        }
      }
    }
    if (cur == 0) ans++;
    ans--;
  }
  cout << ans << '\n';
  return 0;
}
