int main()
{
	string str;
	cin >> str;
	int size = str.size(), count = 0;
	if (size == 4)
	{
		cout << 1;
		return 0;
	}
	vector<int> arr(size);
	int index = 0;
	for (string::iterator it = str.begin(); it != str.end(); it++)
	{
		if (*it == '(') arr[index] = 1;
		else if (*it == ')') arr[index] = -1;
		index++;
	}
	int last = -1, cursum = 0, cursum_cpy = 0;//last判断连续区域,cursum判断当前字符串合法性
	for (int i = 0; i<size; i++)
	{
		if (arr[i] == last) continue;
		last = arr[i];
		for (int j = 0; j<i; j++) cursum += arr[j];
		//往后
		cursum_cpy = cursum;
		for (int j = i + 1; j<size; j++)
		{
			cursum += arr[j];
			if (cursum >= 0)
			{
				if (arr[i] != arr[j])
					count++;
			}
			else
				break;
		}
		//往前
		cursum = cursum_cpy;
		if (i>0)
			cursum -= arr[i - 1];
		else
			continue;
		for (int j = i - 2; j >= 0; j--)
		{
			if (cursum + arr[i] < 0) break;
			cursum -= arr[j];
			if (cursum + arr[i] >= 0)
			{
				if (arr[i] != arr[j])
					count++;
			}
			else
				break;
		}
	}
	cout << count << endl;


     return 0;
}