#include <fstream>

using namespace std;

ifstream fin("evaluare.in");
ofstream fout("evaluare.out");

string s;
int i;

int eval2();
int eval1();

int eval()
{
    int r = eval1();
    while (s[i] == '+' || s[i] == '-')
        if (s[i] == '+')
        {
            ++i;
            r += eval1();
        }
        else
        {
            ++i;
            r -= eval1();
        }
    return r;
}

int eval1()
{
    int r = eval2();
    while (s[i] == '*' || s[i] == '/')
        if (s[i] == '*')
        {
            ++i;
            r *= eval2();
        }
        else
        {
            ++i;
            r /= eval2();
        }
    return r;
}

int eval2()
{
    int r = 0;
    if (s[i] == '(')
    {
        ++i;
        r = eval();
        ++i;
    }
    else
        while (isdigit(s[i]))
        {
            r = r * 10 + s[i] - '0';
            ++i;
        }
    return r;
}
int main()
{
    fin >> s;
    fout << eval() << "\n";
    return 0;
}