#include <fstream>

using namespace std;

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

char s[100005], *p = s;
int i;

int eval2();
int eval1();
int eval() 
{
	int r = eval1();
	while (*p == '+' || *p == '-')
		if (*p == '+')
		{
			++p;
			r += eval1();
		}
		else
		{
			++p;
			r -= eval1();
		}
	return r;
}
int eval1()
{
	int r = eval2();
	while (*p == '*' || *p == '/')
		if (*p == '*')
		{
			++p;
			r *= eval2();
		}
		else
		{
			++p;
			r /= eval2();
		}
	return r;
}
int eval2()
{
	int r = 0;
	if (*p == '(')
	{
		++p;
		r = eval();
		++p;
	}
	else while (isdigit(*p))
	{
		r = r * 10 + *p - '0';
		++p;
	}
	return r;
}
int main()
{
	fin >> s;
	fout << eval() << "\n";
	return 0;
}