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

using namespace std;

const int N=100001;
int p;
char s[N];

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

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=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()
{
    ifstream in("evaluare.in");
    ofstream out("evaluare.out");
    int i=0;
    in.getline(s,100001);
    out<<expresie();
    in.close();
    out.close();
    return 0;
}