#include <iostream>
#include <fstream>
#include <algorithm>
#include <cctype>

using namespace std;

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

string s;
int p=0;
int termen();
int factor();

int expresie()
{
    int sum=termen();
    while(s[p] == '+' || s[p] == '-')
    {
        if(s[p] == '+')
        {
        p++;
        sum=sum+termen();
        }
        else p++, sum -= termen();
    }
    return sum;
}

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

int factor()
{
    int val=0,semn = 1;
    while(s[p] == '-')
    {
     p++;
     semn=-semn;
    }
    if(s[p]=='(')
    {
        p++;
        val=expresie();
        p++;
        return semn*val;
    }
    while(isdigit(s[p]))
    {
        val=val*10+(s[p]-'0');
        p++;
    }
    return semn*val;
}

int main()
{
    fin>>s;
    fout << expresie();
    return 0;
}