#include<fstream>
using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
char s[100005];
char *p=s;
int factor();
int termen();
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<='9'&&*p>='0')
		{
			r=r*10+*p-'0';
			++p;
		}
		return r;
}
int main ()
{
	f>>s;
	g<<expresie();
	return 0;
}