#include <bits/stdc++.h>

using namespace std;

ifstream fin("evaluare.in");
ofstream fout("evaluare.out");

string s;

int eval();
int termen();
int factor();

int pos = 0;
int n;

int eval()
{
	int r = termen();
	
	while(pos < n && (s[pos] == '+' || s[pos] == '-'))
	{
		if(s[pos] == '+')
		{
			++pos;
			r += termen();
		}
		else
		{
			++pos;
			r -= termen();
		}
	}
	
	return r;
}

int termen()
{
	int f = factor();
	
	while(pos < n && (s[pos] == '*' || s[pos] == '/'))
	{
		if(s[pos] == '*')
		{
			++pos;
			f *= factor();
		}
		else
		{
			++pos;
			f /= factor();
		}
	}
	
	return f;
}

int factor()
{
	int e = 0;
	
	if(s[pos] == '(')
	{
		++pos;
		e = eval();
		++pos;
		
		return e;
	}
	else
	{
		while(s[pos] >= '0' && s[pos] <= '9')
		{
			e = e * 10 + s[pos] - '0';
			++pos;
		}
		
		return e;
	}
}

main()
{
	fin >> s;
	n = s.size();
	fout << eval();
	
}