#include <fstream>

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

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

char s[100005], *p;

int main()
{
    fin >> s;
    p = s;
    fout << expresie() << '\n';
    return 0;
}

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

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

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