#include <fstream>
#include <algorithm>

using namespace std;

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

#define DIM 100000

char s[DIM + 5], *p;

static inline int eval();
static inline int termen();
static inline int factor();

static inline int eval() {
  int r = termen();
  while(*p == '+' || *p == '-') 
    if(*p == '+') {
      p++;
      r += termen();
    }
    else {
      p++;
      r -= termen();
    }
  
  return r;
}

static inline int termen() {
  int r = factor();
  while(*p == '*' || *p == '/')
    if(*p == '*') {
      p++;
      r *= factor();
    }
    else {
      p++;
      r /= factor();
    }
  
  return r;
}

static inline int factor() {
  int r = 0;
  if(*p == '(') {
    p++;        // (
    r = eval(); //valoarea expresiei;
    p++;      // )
  }else while(isdigit(*p)) {
    r = r * 10 + (int) * p - '0';
    p++;
  }
  return r;
}

int main() {
  fin.getline(s, DIM + 3);
  p = s;

  fout << eval();

  return 0;
}