#include <iostream>
#include <fstream>
using namespace std;
const int N=100001;
char s[N];
int p;

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

int expresie();
int termen();
int factor();
int expresie()
{
    int sum = termen();
    while(s[p] == '+' || s[p] == '-')
    {
       if(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 *= factor();
        }
        else
        {
            p++;
            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()
{
    in.getline(s, N);
    out << expresie();
    return 0;
}