#include <fstream>
#include <string>
#include <cstring>
#include <cctype>

using namespace std;

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

string s;
int indice;

int termen();
int factor();

int eval()
{
    int r = termen();
    while(s[indice] == '+' || s[indice] == '-')
    {
        if(s[indice] == '+')
        {
            ++indice;
            r+=termen();
            break;
        }
        else
        {
            ++indice;
            r-=termen();
            break;
        }
    }
    return r;
}

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

int factor()
{
    int r = 0;
    if(s[indice] == '(')
    {
        ++indice;
        r = eval();
        ++indice;
    }
    else
    {
        while(isdigit(s[indice]))
        {
            r = r*10 + s[indice] - '0';
            ++indice;
        }
    }
    return r;
}

int main()
{
    fin >> s;
    fout << eval();
    return 0;
}