#include <bits/stdc++.h>
using namespace std;
ifstream in ("evaluare.in");
ofstream out ("evaluare.out");
string s;
int p = 0;
int eval(), factor(), nr(), termen();
int nr ()
{
    int rez = 0;
    while (isdigit(s[p]))
        rez = rez * 10 + s[p++]-'0';
    return rez;
}

int factor ()
{
    if (s[p]=='(')
    {
        p++;
        eval();
    }
    else
        return nr();
}

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

int eval ()
{
    int r = termen();
    while (s[p]=='+' || s[p]=='-')
    {
        if (s[p]=='+')
            p++, r += termen();
        else
            p++, r -= termen();
    }
    return r;
}
int main ()
{
    in>>s;
    out<<eval();
    return 0;
}