#include <iostream>
#include <fstream>
#include <cstring>

using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
int p,l;
char s[100005];

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

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 val = 0, semn = 1;
    while (s[p] == '-')
    {
        semn = -semn;
        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()
{
    f.getline(s,100001);
    l=strlen(s);
    g<<expresie();
    return 0;
}