#include <bits/stdc++.h>

using namespace std;

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

const int DIM = 1e5 + 1;

string s;
int pos, n;

int eval();
int term();
int fact();

int eval() {
  int res = term(); 
  while ( pos < n && (s[pos] == '+' || s[pos] == '-') ) {
	if ( s[pos] == '+' ) {
	  ++pos;
	  res += term();
	} else {
	  ++pos;
	  res -= term();
	}
  }
  return res;
}
int term() {
  int res = fact();
  while ( pos < n && (s[pos] == '*' || s[pos] == '/') ) {
	if ( s[pos] == '*' ) { 
	  ++pos;
	  res *= fact();
	} else {
	  ++pos;
	  res /= fact();
	}
  }
  return res;
}
int fact() {
  int res = 0;
  if ( s[pos] == '(' ) {
	++pos;
	res = eval();
	++pos;
  } else {
	while ( pos < n && isdigit(s[pos]) ) {
	  res = res * 10 + s[pos++] - '0';
	}
  }
  return res;
}

int main() {
  ios_base::sync_with_stdio(0);
  fin.tie(0);
  
  fin >> s;
  n = s.length();
  fout << eval();
  fin.close();
  fout.close();
  return 0;
}