#include <cstdio>

char s[100010],*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() {
	freopen("evaluare.in", "rt",stdin);
	freopen("evaluare.out", "wt",stdout);
    	fgets(s, 100010, stdin); 
    	printf("%ld",eval());
    	return 0;
}