# -*- coding:utf-8 -*-

def calc(shiki):
	global nums
	stack = []
	ans = 0
	a = 0
	ope = "+"
	shiki+="*"
	for i in shiki:
		if i in nums:
			stack.append(int(i))
		else:
			keta = 1
			a = 0
			while len(stack) > 0:
				a += keta * stack.pop()
				keta *= 10
			if ope == "-":
				ans -= a
			else:
				ans += a
			ope = i
	return ans

if __name__ == "__main__":
	s = raw_input()
	nums = map(str,range(10))
	prev = s[len(s)-1]
	mx = 0
	for i in xrange(len(s)):
		if s[i] in nums and prev in nums:
			temp = s[i:len(s)] + s[0:i]
			mx = max(mx,calc(temp))
		prev = s[i]
	print mx