#include <cstdio>
const long MAX = 100010;
char S[MAX], *p=S;
long termen();
long factor();
long eval() {
	long r = termen();
	while ( *p=='+' || *p=='-' ) {
		switch ( *p ) {
			case '+':
				++p;						
				r += termen(); 
				break;
			case '-':
				++p;					
				r -= termen();
				break;
		}
	}
	return r;
}
 

long termen() {
	long r = factor();
	while ( *p=='*' || *p=='/' ) {
		switch ( *p ) {
			case '*' :
				++p;
				r *= factor();
				break;
			case '/':
				++p;
				r /= factor();
				break;
		}
	}
	return r;
}
long factor() {
    long r=0;  
    if ( *p == '(' ) {					
        ++p;								
		r = eval(); 
		++p;								
    } else {  
        while ( *p>='0' && *p<='9' )  {		
            r = r*10 + *p - '0';  
			++p;
		}
    }  
    return r;
}
 
int main() { 
    fgets(S, MAX, fopen("evaluare.in", "r"));  
    fprintf(fopen("evaluare.out", "w"), "%ld\n", eval());  
    return 0;
}