#include <cstdio>
#include <ctype.h>

int token;

int expr();
int number();
int digit();
int term();
int factor();

void getToken() {
	token = getchar();
}

int expr() {
	int result = term();
	while (token == '+' || token == '-') {
		if (token == '+') {
			getToken();
			result += term();
		}
		else {
			getToken();
			result -= term();
		}
	}
	if (token == ')')
		getToken();
	return result;
}

int term() {
	int result = factor();
	while (token == '*' || token=='/') {
		if (token == '*') {
			getToken();
			result *= factor();
		}
		else {
			getToken();
			result /= factor();
		}
	}
	return result;
}

int factor() {
	if (token == '(') {
		getToken();
		return expr();
	}
	return number();
}

int digit() {
	int result;
	if (isdigit(token)) {
		result = token - '0';
		getToken();
	}
	return result;
}

int number() {
	int result = 0;
	while (isdigit(token)) {
		result = 10 * result + digit();
	}
	return result;
}

int main() {
	getToken();
	printf("%d", expr());
	return 0;
}