#include <cstdio>

const long long MAX = 100010;
char S[MAX], *p=S;

long long termen();
long long factor();

long long eval() {
	long r = termen();
	while ( *p=='+' || *p=='-' ) {
		switch ( *p ) {
			case '+':
				++p;						// trecem peste semnul "+"
				r += termen();
				break;
			case '-':
				++p;						// trecem peste semnul "-"
				r -= termen();
				break;
		}
	}
	return r;
}

long long termen() {
	long r = factor();
	while ( *p=='*' || *p=='/' ) {
		switch ( *p ) {
			case '*' :
				++p;
				r *= factor();
				break;
			case '/':
				++p;
				r /= factor();
				break;
		}
	}
	return r;
}

long long factor() {
    long r=0;
    if ( *p == '(' ) {						// avem o subexpresie
        ++p;								// trecem peste '('
		r = eval();
		++p;								// trecem peste ')'
    } else {
        while ( *p>='0' && *p<='9' )  {		// avem un numar
            r = r*10 + *p - '0';
			++p;
		}
    }
    return r;
}

int main()
{
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);
    scanf("%s",&S);
    printf("%lld\n", eval());
    return 0;
}