#include <bits/stdc++.h>
using namespace std;
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;
}