#include<fstream>
using namespace std;
ifstream in("evaluare.in");
ofstream out("evaluare.out");
char s[100005];
int p=0,termen(),factor();
int expresie()
{
	int sum=termen();
	while(s[p]=='+' || s[p]=='-')
	{
		++p;
		if(s[p-1]=='+')sum+=termen();
		else sum-=termen();
	}
	return sum;
}
int termen()
{
	int sum=factor();
	while(s[p]=='*' || s[p]=='/')
	{
		p++;
		if(s[p-1]=='*')sum*=factor();
		else sum/=factor();
	}
	return sum;
}
int factor()
{
	int val=0;
	if(s[p]=='(')
	{
		++p;
		val=expresie();
		++p;
	}
	else 
		while (s[p]>='0' && s[p]<='9')
		{
			val=val*10+(s[p]-'0');
			++p;
		}
	return val;
}
int main()
{
	in>>s;
	out<<expresie();
}