#include <cstdio>

const int S = 100002;

char s[S],*p=s+1;

int termen();

int factor();

int eval()
{
	int r = termen();
	while ((*p == '+')||(*p == '-'))
	{
		if (*p == '+')
		{
			++p;
			r += termen();
		}
		if (*p == '-')
		{
			++p;
			r -= termen();
		}
	}
	return r;
}

int termen()
{
	int r = factor();
	while ((*p == '*')||(*p == '/'))
	{
		if (*p == '*')
		{
			++p;
			r *= factor();
		}
		if (*p == '/')
		{
			++p;
			r /= factor();
		}
	}
	return r;
}

int factor()
{
	int r = 0;
	if (*p == '(')//expresie
	{
		++p;//trecem peste '('
		r = eval();
		++p;//trecem peste ')'
	}
	else //numar
		while (('0' <= *p)&&(*p <= '9'))
		{
			r = r * 10 + *p - '0';
			++p;
		}
	return r;
}

int main()
{
	freopen("evaluare.in","r",stdin);
	freopen("evaluare.out","w",stdout);
	gets(s+1);
	printf("%d",eval());
	return 0;
}