#include<iostream>
#include<string>
#include<vector>

using namespace std;

int main() {

    string s;
    cin >> s;

    long long n = s.size();
    vector < vector < long long > > a(n + 1, vector < long long > (n + 1, 0));

    a[0][0] = 1;

    for (int i = 1; i <= n; i++) {
        for (int j = 0; j <= n; j++) {
            if (s[i - 1] == ')') {
                a[i][j] = a[i - 1][j + 1];
                continue;
            }
            if (s[i - 1] == '(') {
                if (j - 1 >= 0) {
                    a[i][j] = a[i - 1][j - 1];
                }
                continue;
            }

            if (j - 1 >= 0) {
                a[i][j] = a[i - 1][j + 1] + a[i - 1][j - 1];
            }
            else {
                a[i][j] = a[i - 1][j + 1];
            }
        }
    }
    cout << a[n][0];
}