#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;
		int a= sum();
		++i;
		return a;
	}
	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(i < l)
	{
		while (s[i] == '*' || s[i] == '/')
		{
			if (s[i] == '*')
			{
				++i;
				a *= inter();
			}
			if (s[i] == '/')
			{
				++i;
				a /= inter();
			}
		}
	}
	return a;
}

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

	if(i < l)
	{
		while (s[i] == '+' || s[i]=='-')
		{
			if (s[i] == '+')
			{
				++i;
				a += multiply();
			}
			if (s[i] == '-')
			{
				++i;
				a -= multiply();
			}
		}
	}
	return a;
}

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