#include <iostream>
#include <fstream>

using namespace std;

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

const int N = 100005;

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 *= 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 val*semn;
   }
   while (isdigit(s[p]))
   {
      val = val*10 + s[p] - '0';
      p++;
   }
   return val*semn;
}

int main()
{
    in >> s;
    out << expresie();
    return 0;
}