#include <fstream>

using namespace std;
const int DMAX = 1e5 + 1;

char S[DMAX], *p = S;

ifstream f("evaluare.in");
ofstream g("evaluare.out");

int expresie(), termen(), factor();

int expresie()
{
    int r = termen();
    while(*p == '+' || *p == '-')
    {
        if(*p == '+')
        {
            ++p;
            r += termen();
        }
        else
        {
            ++p;
            r -= termen();
        }
    }
    return r;
}

int termen()
{
    int r = factor();
    while(*p == '*' || *p == '/')
    {
        if(*p == '*')
        {
            ++p;
            r *= factor();
        }
        else
        {
            ++p;
            r /= factor();
        }
    }
    return r;
}

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

int main()
{
    f.getline(S, DMAX);
    g << expresie();
    return 0;
}