#include <stdio.h>
#define DIM 100001

int expresie ();
int termeni ();
int factori ();

char S[DIM], *P = S;

int expresie ()
{
	int n = termeni ();
	while (*P == '+' || *P == '-')
		if (*P == '+')
		{
			P++;
			n += termeni ();
		}		
		else
		{
			P++;
			n -= termeni ();
		}
	return n;
}

int termeni ()
{
	int n = factori ();
	while (*P == '*' || *P == '/')
		if (*P == '*')
		{
			P++;
			n *= factori ();
		}
		else
		{
			P++;
			n /= factori ();
		}
	return n;
}

int factori ()
{
	int n = 0;
	if (*P == '(')
	{
		P++;
		n = expresie ();
		P++;
	}
	else
		while (*P >= '0' && *P <= '9')
		{
			n = n * 10 + *P - '0';
			P++;
		}
	return n;
}

int main ()
{
	freopen ("evaluare.in", "r", stdin);
	freopen ("evaluare.out", "w", stdout);
	
	fgets (S, DIM, stdin);
	printf ("%d", expresie () );
	
	return 0;
}