#include <fstream>

using namespace std;

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

const int Dim = 1e6 +5;
char s[Dim];
int p = 1;
int factor();
int exp();
int termen();

int exp() {

	int sum = termen();
	while ( s[p] == '+' or s[p] == '-') {
		
		if ( s[p] == '+') {
			
			++p;
			sum += termen();
		}
		else
			if ( s[p] == '-') {
				
				++p;
				sum -= termen();
			}
	}
	return sum;
}

int termen() {
	
	int prod = factor();
	while ( s[p] == '*' or s[p] == '/' ) {
		
		if ( s[p] == '*') {
			
			++p;
			prod *= factor();
		}
		else if ( s[p] == '/' ) {
			++p;
			prod /= factor();
		}
	}	
	return prod;
}

int factor() {
	
	int val = 0, semn = 1;
	while ( s[p] == '-') {
		
		++p;
		semn *= -1;
	}
	if ( s[p] == '(') {
		
		p++;
		val = exp();
		p++;
		return semn * val;
	}
	while ( isdigit(s[p]) ) {
			val = val * 10 + s[p] - '0';
		++p;
		}
	return semn * val;
}

int main() {

	fin >> (s + 1);
	fout << exp();
	
}