#include <bits/stdc++.h>

using namespace std;

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

string s;
int pos = 0;

int eval();

int fact()
{
    if (s[pos] == '(')
    {
        pos++;
        int x = eval();
        pos++;
        return x;
    }
    else
    {
        int nr = 0;
        while (s[pos] >= '0' and s[pos] <= '9')
        {
            nr *= 10;
            nr += s[pos] - '0';
            pos++;
        }
        return nr;
    }
}

int term()
{
    int x = fact();
    while (s[pos] == '*' or s[pos] == '/')
    {
        if (s[pos] == '*')
        {
            pos++;
            x *= fact();
        }
        else
        {
            pos++;
            x /= fact();
        }
    }
    return x;
}

int eval()
{
    int x = term();
    while (s[pos] == '+' or s[pos] == '-')
    {
        if (s[pos] == '+')
        {
            pos++;
            x += term();
        }
        else
        {
            pos++;
            x -= term();
        }
    }
    return x;
}

int main()
{
    in >> s;
    s += "#";
    out << eval();
    return 0;
}