#include<fstream>
#include<algorithm>
#include<vector>
#include<string.h>
using namespace std;

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

char s[100010];
int i = 0,l;

int sum();

int inter()
{
	if (s[i] == '(')
	{
		++i;
		return sum();
	}
	else
	{
		int nr=0;
		while (i<l && s[i] >= '0' && s[i] <= '9')
			nr = nr * 10 + (s[i] - '0'),++i;
		return nr;
	}
}

int multiply()
{
	int a = inter();

	if (s[i] == '*')
	{
		++i;
		a*=inter();
	}
	else if (s[i] == '/')
	{
		++i;
		a/=inter();
	}
	else if (s[i] == ')')
		++i;
	return a;
}

int sum()
{
	int a = multiply();

	if (s[i] == '+')
	{
		++i;
		a += multiply();
	}
	else if (s[i] == '-')
	{
		++i;
		a -= multiply();
	}
	else if (s[i] == ')')
		++i;
	return a;
}

int main()
{
	in >> s;
	l = strlen(s);
	out << sum();
	return 0;
}