#include <fstream>
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
char S[100009], *p = S;

int Eval();

int Factor ()
{
    int r = 0;
    if (*p == '(')
    {
        ++p;
        r = Eval();
        ++p;
    }
    else
    {
        while (*p >= '0' && *p <= '9')
        {
            r = r * 10 + (*p - '0');
            ++p;
        }
    }
    return r;
}

int Termen ()
{
    int r = Factor();
    while (*p == '*' || *p == '/')
    {
        switch (*p)
        {
            case '*' :
            {
                ++p;
                r *= Factor();
                break;
            }
            case '/' :
            {
                ++p;
                r /= Factor();
                break;
            }
        }
    }
    return r;
}

int Eval ()
{
    int r = Termen();
    while (*p == '+' || *p == '-')
    {
        switch (*p)
        {
            case '+' :
            {
                ++p;
                r += Termen();
                break;
            }
            case '-' :
            {
                ++p;
                r -= Termen();
                break;
            }
        }
    }
    return r;
}

int main()
{
    fin.getline(S, 100000);
    fout << Eval() << '\n';
    fout.close();
    return 0;
}