/* ========================================================================== */
/*                                                                            */
/*   Evaluarea unei expresii.cpp                                              */
/*   (c) 2008 Dr.Optix (Cristian Dinu)                                        */
/*                                                                            */
/*   This program take an arithmetic  expresion as input from a   file   and  */
/*   return the result.                                                       */
/*   I followed the idea from this source:                                    */
/*   http://infoarena.ro/job_detail/145387?action=view-source                 */
/*                                                                            */
/* ========================================================================== */


#include <cstdio>

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

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


int main() {
    FILE *fin=fopen("evaluare.in", "r");
    FILE *fout=fopen("evaluare.out", "w");

    fgets(S, MAX, fin);
    fprintf(fout, "%ld\n", eval());
    return 0;
}

long eval() {
	long r = termen();
	while ( *p=='+' || *p=='-' ) {
		switch ( *p ) {
			case '+':
				++p;						// trec peste "+"
				r += termen();
				break;
			case '-':
				++p;						// trec peste "-"
				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 == '(' ) {						// subexpresie
        ++p;								// trec peste '('
		r = eval();
		++p;								// trec peste ')'
    } else {
        while ( *p>='0' && *p<='9' )  {		// numar
            r = r*10 + *p - '0';
			++p;
		}
    }
    return r;
}