#include<cstdio>

const int N = (1<<17);

char s[N],*p;

int expresie();
int termen();
int factor();

int factor()
{
	int x=0;
	if(*p=='(')
	{
		++p;
		x=expresie();
		++p;
	}
	while(*p>='0' && *p<='9')
		x=x*10+(*p++)-'0';
	return x;
}

int termen()
{
	int x=factor();
	while(*p=='*' || *p=='/')
		x=(*p++=='*' ? x*factor() : x/factor());
	return x;
}

int expresie()
{
	int x=termen();
	while(*p=='+' || *p=='-')
		x+=(*p++=='+' ? termen() : -termen());
	return x;
}

int main()
{
	freopen("evaluare.in","r",stdin);
	freopen("evaluare.out","w",stdout);
	fgets(s,N,stdin);
	p=s;
	printf("%d\n",expresie());
	return 0;
}