#include<stdio.h>
#include<string.h>
#define N 100100
#define marc 2000000

inline bool cifra(char c){
	return c>='0' && c<='9';
}

inline bool op(char c){
	return c=='+' || c== '-' || c=='*' || c=='/';
}

inline int priori(char c){
	if(c=='+' || c=='-')
		return 1;
	if(c=='*' || c=='/')
		return 2;
	return 0;
}

inline int oper(char op,int x,int y){
	if(op=='+')
		return x+y;
	if(op=='-')
		return x-y;
	if(op=='*')
		return x*y;
	return x/y;
}

int numar(char *&s){
	int val=0;
	while(cifra(*s)){
		val=val*10+(int)(*s-'0');
		++s;
	}
	return val;
}

void final(int &vfi,int *sti,int &vfc,char *stc){
	int rez;
	while(vfc && stc[vfc]!='('){
		rez=oper(stc[vfc],sti[vfi-1],sti[vfi]);
		sti[--vfi]=rez;
		--vfc;
	}
	--vfc;
}

void calc(char *&s,int &vfi,int *sti,int &vfc,char *stc){
	if(vfc==0 || priori(*s)>priori(stc[vfc])){
		stc[++vfc]=*s;
		++s;
		return;
	}
	char c=stc[vfc];
	int rez=oper(c,sti[vfi-1],sti[vfi]);
	sti[--vfi]=rez;
	stc[vfc]=*s;
	++s;
}

int calcul(char *s){
	int vfi=0,vfc=0,sti[N];
	char stc[N];
	while(*s!='\n'){
		if(cifra(*s))
			sti[++vfi]=numar(s);
		else{
			if(*s=='('){
				stc[++vfc]=*s;
				++s;
			}
			else
			if(*s==')'){
				final(vfi,sti,vfc,stc);
				++s;
			}
			else
			if(op(*s))
				calc(s,vfi,sti,vfc,stc);
		}
	}
	final(vfi,sti,vfc,stc);
	return sti[1];
}

int main(){
	freopen("evaluare.in","r",stdin);
	freopen("evaluare.out","w",stdout);
	char s[N];
	fgets(s,N,stdin);
	printf("%d\n",calcul(s));
	return 0;
}