#define _CRT_SECURE_NO_WARNINGS
#include <cstdio>

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

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 (*p >= '0' && *p <= '9')
		{
			r = r * 10 + *p - '0';
			++p;
		}
	}
	return r;
}

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