#include <bits/stdc++.h>
using namespace std;

const int MAXN = 100005;

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

char s[MAXN], *p = s;

int Termen();
int Factor();

int Eval()
{
    int r = Termen();
    while (*p == '+' || *p == '-')
    {
        switch(*p)
        {
            case '+':
            {
                ++p;
                r += Termen();
                break;
            }
            case '-':
            {
                ++p;
                r -= Termen();
                break;
            }
        }
    }
    return r;
}

int Termen()
{
    int r = Factor();
    while (*p == '*' || *p == '/')
    {
        switch(*p)
        {
            case '*':
            {
                ++p;
                r *= Factor();
                break;
            }
            case '/':
            {
                ++p;
                r /= Factor();
                break;
            }
        }
    }
    return r;
}

int Factor()
{
    int r = 0;
    if (*p == '(')
    {
        ++p;
        r = Eval();
        ++p;
    }
    else
    {
        while (*p >= '0' && *p <= '9')
        {
            r = r * 10 + (*p - '0');
            ++p;
        }
    }
    return r;
}

int main()
{
    fin.getline(s, MAXN);
    fout << Eval();
    fin.close();
    fout.close();
    return 0;
}