#include <fstream>
#define PARANTEZA	-1000000001
#define PLUS		-1000000002
#define MINUS		-1000000003
#define MUL			-1000000004
#define DIV			-1000000005

using namespace std;

const int DIM = 100010;

char s[DIM];
int st[DIM];
int vf = 0;
/*
 ( -1
 + -2
 - -3
 * -4
 / -5
*/

void Read()
{
	ifstream f("evaluare.in");
	f.getline(s + 1, DIM);
	f.close();
}

int GetStackElement(int &i)
{
	if (s[i] == '(')
	{
		return PARANTEZA;
	}
	if (s[i] == '+')
	{
		return PLUS;
	}
	if (s[i] == '-')
	{
		return MINUS;
	}
	if (s[i] == '*')
	{
		return MUL;
	}
	if (s[i] == '/')
	{
		return DIV;
	}
	if ('0' <= s[i] && s[i] <= '9')
	{
		int ret = 0;
		while ('0' <= s[i] && s[i] <= '9')
		{
			ret = ret * 10 + s[i] - '0';
			++i;
		}
		--i;
		return ret;
	}
	return 0;
}

bool CheckMulOrDiv()
{
	if (vf - 1 >= 1 && (st[vf - 1] == MUL || st[vf - 1] == DIV))
	{
		int rez = st[vf - 2];
		if (st[vf - 1] == MUL)
		{
			rez = rez * st[vf];
		}
		else
		{
			rez = rez / st[vf];
		}
		vf -= 3;
		st[++vf] = rez;
		return true;
	}
	return false;
}

void MakePlusAndMinus()
{
	int rez = 0;
	while (true)
	{
		int semn = 1;
		if (st[vf - 1] == MINUS)
			semn = -1;
		if (st[vf - 1] == PLUS)
			semn = 1;
		rez += semn * st[vf];
		--vf;
		if (st[vf] == MINUS || st[vf] == PLUS)
			--vf;
		if (vf == 0 || st[vf] == PARANTEZA)
		{
			st[++vf] = rez;
			return;
		}
	}
}

void Solve()
{
	for (int i = 1; s[i] != 0; ++i)
	{
		if (s[i] == ')')
		{
			MakePlusAndMinus(); // (rez
			int x = st[vf];
			--vf; --vf;
			st[++vf] = x;
			CheckMulOrDiv();
		}
		else
		{
			st[++vf] = GetStackElement(i);
			CheckMulOrDiv();
		}
	}
	MakePlusAndMinus();
}

void Write()
{
	ofstream g("evaluare.out");
	g << st[1] << "\n";
	g.close();
}

int main()
{
	Read();
	Solve();
	Write();
	return 0;
}