#include <fstream>

using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
char s[100001];
int i;
int expresie();
int termen();
int factor();

int expresie()
{
    int sum=termen();
    while (s[i] == '+' || s[i] == '-')
    {
        if (s[i] == '+')
        {
            i++;
            sum+=termen();
        }
        else
        {
            i++;
            sum-=termen();
        }
    }
    return sum;
}

int termen()
{
    int prod = factor();
    while (s[i] == '*' || s[i] == '/')
    {
        if (s[i] == '*')
        {
            i++;
            prod *= factor();
        }
        else
        {
            i++;
            prod /= factor();
        }
    }
    return prod;
}

int factor()
{
    int val = 0, semn = 1;
    while (s[i] == '-')
    {
        semn = -semn;
        i++;
    }
    if (s[i] == '(')
    {
        i++;
        val=expresie();
        i++;
        return semn*val;
    }

    while ('0'<=s[i]&&s[i]<='9')
    {
        val=val*10+(s[i]-'0');
        i++;
    }
    return semn*val;
}
int main()
{
    fin >> s;
    fout<<expresie()<< "\n";
    return 0;
}