#include <bits/stdc++.h>

#define DIM 100000
char expr[DIM], *p = expr;

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 ('0' <= *p && *p <= '9') {
			r = (r << 3) + (r << 1) + *p - '0';
			++p;
		}
	}

	return r;
}

int main() {
	fgets(expr, DIM, fopen("evaluare.in", "r"));
	fprintf(fopen("evaluare.out", "w"), "%ld\n", eval());
	return 0;
}