#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
const int N = 100001;
char s[N];
int p;
int exprresie();
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 semn * val;
  }
  while('0' <= s[p] && s[p] <= '9'){
    val = val * 10 + (s[p]-'0');
    p++;
  }
  return semn * val;
}

int main()
{
  ifstream f("evaluare.in");
  ofstream g("evaluare.out");
  f >> s;
  g << expresie();
}