#include <iostream>
#include <string>
#include <vector>
using namespace std;

int main() {
    cin.tie(nullptr)->sync_with_stdio(false);
    string s;
    cin >> s;

    vector<long long> st{0};

    bool is_inf = false;
    constexpr long long thres = 1000000000000000000LL;

    for (int i = (int)s.size() - 1; i >= 0; --i) {
        if (s.at(i) == '(') {
            if (st.size() == 1) {
                st.back() += 1;
                break;
            }
            auto v = st.back();
            st.pop_back();
            if (v >= 60) {
                is_inf = true;
                v = 0;
            }
            st.back() += 1LL << v;
            if (st.back() > thres) {
                is_inf = true;
                st.back() = 0;
            }
        } else {
            st.push_back(0);
        }
    }

    while (st.size() > 1) st.pop_back(), st.back() += 1;

    auto ret = st.back();
    if (ret > thres) is_inf = true;

    if (is_inf) {
        puts("INFTY");
    } else {
        cout << ret << endl;
    }
}