#include <bits/stdc++.h>

using namespace std;

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

int p;
string s;
int termen();
int factor();

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

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

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



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