#!/usr/bin/env python
# -*- coding: utf-8 -*-

S = input()
ans = -10**10
for i in range(len(S)):
    e = S[i+1:] + S[:i+1]
    try:
        eval(e)
    except:
        continue
    if e[0] != '+' and e[0] != '-' and e[-1] != '+' and e[-1] != '-':
        ans = max(ans,eval(e))
print(ans)