#include <stdio.h>

#define MAXN 100000

char S[MAXN+1];
char *p=S;
 
int termen();
int factor();
 
int eval() {
	long r = termen();
	while ( *p=='+' || *p=='-' ) {
		switch ( *p ) {
			case '+':
				++p;						
				r += termen(); 
				break;
			case '-':
				++p;						
				r -= termen();
				break;
		}
	}
	return r;
}
 
int termen() {
	int r = factor();
	while ( *p=='*' || *p=='/' ) {
		switch ( *p ) {
			case '*' :
				++p;
				r *= factor();
				break;
			case '/':
				++p;
				r /= factor();
				break;
		}
	}
	return r;
}
 
int factor() {
    int r=0;  
    if ( *p == '(' ) {						
        ++p;								
		r = eval(); 
		++p;								
    } else {  
        while ( *p>='0' && *p<='9' )  {		
            r = r*10 + *p - '0';  
			++p;
		}
    }  
    return r;
}
 
int main() { 

	freopen("evaluare.in","rt",stdin);
	//freopen("test10.in","rt",stdin);
	freopen("evaluare.out","wt",stdout);
	
	scanf("%s\n",S);

	int rez=eval();
	printf("%d\n",rez); 

	return 0;
}