#include <fstream>

using namespace std;

const int N = 1e5;

char s[N+1];

int expresie(char* &);
int termen(char* &);
int factor(char* &);

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

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

int factor(char* &p)
{
    int val = 0, semn = 1;
    while (*p == '-')
    {
        semn = -semn;
        p++;
    }
    if (*p == '(')
    {
        p++;
        val = expresie(p);
        p++;
        return semn * val;
    }
    while ('0' <= *p && *p <= '9')
    {
        val = val * 10 + (*p - '0');
        p++;
    }
    return semn * val;
}

int main()
{
    ifstream in("evaluare.in");
    ofstream out("evaluare.out");
    in >> s;
    char *p = s;
    out << expresie(p) << "\n";
    in.close();
    out.close();
    return 0;
}