#include <cstdio>
#include <cstring>
using namespace std;

FILE *f=fopen ("evaluare.in","r");
FILE *g=fopen ("evaluare.out","w");

char s[100005], *r=s;

int inm(), val();

int pmns(){
	int ret=inm();
	while (*r=='-' || *r=='+'){
		if (*r=='+'){
			r++;
			ret+=inm();
		}
		else{
			r++;
			ret-=inm();
		}
		inm();
	}
	return ret;
}

int inm(){
	int ret=val();
	while (*r=='*' || *r=='/'){
		if (*r=='*'){
			r++;
			ret*=val();
		}
		if (*r=='/'){
			r++;
			ret/=val();
		}
		val();
	}
	return ret;
}

int val(){
	int ret=0;
	if (*r=='('){
		r++;
		ret=pmns();
		r++;
	}
	else{
		while (*r>='0' && *r<='9'){
			ret=ret*10+(*r-'0');
			r++;
		}
	}
	return ret;
}


int main(){
	int lg;
	
	fscanf (f,"%s",s);
	lg=strlen(s);
	
	fprintf (g,"%d",pmns());
	
	return 0;
}