import java.io.*;
import java.util.*;

class Main {
	
	public static void out (Object o) {
		System.out.println(o);
	}
	
	public static int calc (String s) {
		//out("calc:" + s);
		int ret = 0 , work = 0 , i = 0 , len = s.length();
		boolean addFlg = true;
		while (i < len) {
			while (i < len && s.charAt(i) != '+' && s.charAt(i) != '-')
				work = work * 10 + (s.charAt(i++) - '0');
			ret = addFlg ? ret + work : ret - work;
			//out("ret : " + ret + "\ti : " + i);
			work = 0;
			if (i < len)
				addFlg = s.charAt(i++) == '+';
		}
		return ret;
	}
	
	public static int solve (String s) {
		int ret = Integer.MIN_VALUE;
		int len = s.length();
		for (int i = 0; i < len; i++) {
			String t = "";
			for (int j = 0; j < len; j++) {
				t += s.charAt((i + j) % len) + "";
			}
			if (!(t.charAt(0) + "").matches("[0-9]") || 
				!(t.charAt(len - 1) + "").matches("[0-9]")) {
					continue;
			}
			ret = Math.max(ret , calc(t));
		}
		return ret;
	}
	
	public static void main (String[] args) throws IOException {
		BufferedReader br = 
			new BufferedReader(new InputStreamReader(System.in));
		
		out(solve(br.readLine()));
	}
}