#include<fstream>
#include<string>
using namespace std;

char s[100010], *p=s;

int exp();
int termen();
int factor()
{
	int nr = 0;
	if(*p=='(')
	{
		++p;
		nr = exp();
		++p;		// sarim peste ')'
	}
	else
		while(isdigit(*p))
		{
			nr=nr*10+*p-'0';
			++p;
		}
	return nr;
}
int termen()
{
	int r = factor();

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

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

int main()
{
	freopen("evaluare.in","r",stdin);
	freopen("evaluare.out","w",stdout);
	scanf("%s",&s);
	printf("%d",exp());
	return 0;
}