#include <cstdio>
#include <cstring>

char s[100005];
char *p = s , ope[4][3] = {"+-","*/","r"} , *cifre = "0123456789";
int eval(int h);

int operatie(int x,int y,char s)
{
	if(s == '+') return x + y;
	if(s == '-') return x - y;
	if(s == '/') return x/y;
	if(s == '*') return x*y;
	return  0;
}

int elem()
{
	int ans = 0;
	if(*p == '(') p++ , ans = eval(0) , p++;
	else while(strchr(cifre,*p)) ans = ans * 10 + *(++p - 1) - '0';
	return ans;
}

int eval(int h)
{
	int t = h == 2 ? elem() : eval(h + 1);
	while(strchr(ope[h],*p)) t = operatie(t,eval(h + 1),*(++p - 1));
	return t;
}

int main()
{
	freopen("evaluare.in","r",stdin);
	freopen("evaluare.out","w",stdout);
	fgets(s,100005,stdin);
	printf("%d\n",eval(0));
	return 0;
}