#include <fstream>
 
using namespace std;
ifstream in("evaluare.in");
ofstream out("evaluare.out");
 
int expresie();
int termen();
int factor();
 
char s[100001];
int p;
 
int expresie()
{
    int sum = termen();
    while (s[p] == '+' || s[p] == '-')
        if (s[p] == '+')
        {
            p++;
            sum += termen();
        }
        else
        {
            p++;
            sum -= termen();
        }
    return sum;
}
 
int termen()
{
    int prod = factor();
    while (s[p] == '*' || s[p] == '/')
        if(s[p] == '*')
        {
            p++;
            prod *= factor();
        }
        else
        {
            p++;
            prod /= factor();
        }
    return prod;
}
 
int factor()
{
    int semn = 1, val = 0;
    while (s[p] == '-')
    {
        p++;
        semn = -semn;
    }
    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()
{
    in.get(s,sizeof(s));
    p=0;
    int nr=expresie();
    out<<nr;
    return 0;
}