#include<stdio.h>
int i,p;
char s[100000];

int get_nr();
int get_f();

int get_e()
{
	int rez=get_f();

	while(s[p]=='+'||s[p]=='-')
	{
		p++;
		if(s[p-1]=='+')
			rez+=get_f();
		else
			rez-=get_f();

	}

	return rez;

}
int get_f()
{
	int rez=get_nr();
	while(s[p]=='*'||s[p]=='/')
	{
		p++;
		if(s[p-1]=='*')
			rez*=get_nr();
		else
			rez/=get_nr();

	}

	return rez;

}
int get_nr()
{
	int rez=0,i;

	if(s[p]=='(')
	{
		p++;
		rez=get_e();
		p++;
		return rez;
	}

	for(;'0'<=s[p] && s[p]<='9';p++)
		rez=rez*10+s[p]-'0';

	return rez;
}
int main()
{
	freopen("evaluare.in","r",stdin);
	freopen("evaluare.out","w",stdout);

	scanf("%s",&s);

	printf("%d",get_e());

	return 0;

}