#include <fstream>

using namespace std;
const int DMAX = 100001;

char S[DMAX], *p = S;

ifstream f("evaluare.in");
ofstream g("evaluare.out");

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

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

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

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

int main()
{
	f.getline(S, DMAX);
	g << expresie();
	f.close();
	g.close();
	return 0;
}