#include <bits/stdc++.h>
using namespace std;
ifstream in("evaluare.in");
ofstream out("evaluare.out");

const int N = 100002;
char s[N];
int p;

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 *= termen();
     }
     else
     {
        ++p;
        prod /= termen();
     }
  }
  return prod;
}

int factor()
{
   int semn = 1,val = 0;
   while (s[p] == '-')
   {
     semn = -semn;
     ++p;
   }
   if (s[p] == '(')
       {
          ++p;
          val = expresie();
          ++p;
          return semn * val;
       }
    while (s[p] >= '0' && s[p] <= '9')
    {
       val = val * 10 + (s[p] - '0');
       ++p;
    }
    return semn * val;
}

int main()
{
    in.get(s,100002);
    out<<expresie();
    return 0;
}