/*
Evaluarea unei expresii.
*/

#include <iostream>
#include <stdio.h>
#include <string.h>

#define LEN		100010
#define NR		4
#define NIV		2

using namespace std;

char expresie[LEN];
char *p = expresie;
char op[NIV][NR] = {"+-", "*/"};

int calculeaza(int operand_1, int operand_2, char tip_op) {
	int rez = 0;	
	switch (tip_op) {
		case '+': rez = operand_1 + operand_2; break;
		case '-': rez = operand_1 - operand_2; break;
		case '*': rez = operand_1 * operand_2; break;
		case '/': rez = operand_1 / operand_2; break;
	}
	return rez;
}

int evalueaza (int nivel) {
	int numar, aux;
	if (nivel == NIV) {
		if (*p == '(') {
			++p;
			numar = evalueaza(0);
			++p;
		}
		else {
			numar = 0;
			while ('0' <= *p && *p <= '9') {
				numar = numar * 10 + *p - '0';
				++p;
			}
		}	
	}
	else 
		for(numar = evalueaza(nivel + 1); strchr(op[nivel], *p); numar = aux)
			aux = calculeaza(numar, evalueaza(nivel + 1), *p++);
	return numar;
}

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

	fgets(expresie, LEN, f_in);
	fprintf(f_out, "%d\n", evalueaza(0));
	return 0;
}