#include<fstream>

using namespace std;

const int N = (1<<17);

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

char c;

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

int factor()
{
    int x = 0;
    if(c=='(')
    {
        c = in.get();
        x=expresie();
        c = in.get();
    }
    while(c >= '0' && c <= '9')
    {
        x = x * 10 + c - '0';
        c = in.get();
    }
    return x;
}

int termen()
{
    int prod = factor();
    while (c == '*' || c == '/')
    {
        if (c == '*')
        {
            c = in.get();
            prod *= factor();
        }
        else
        {
            c = in.get();
            prod /= factor();
        }
    }
    return prod;
}

int expresie()
{
    int sum = termen();
    while (c == '+' || c == '-')
    {
        if (c == '+')
        {
            c = in.get();
            sum += termen();
        }
        else
        {
            c = in.get();
            sum -= termen();
        }
    }
    return sum;
}

int main()
{
    //fgets(s,N,stdin);
    //p=s;
    c = in.get();
    out << expresie() << "\n";
    in.close();
    out.close();
    return 0;
}