import re
S = str(input())
ans = -1 * 10 ** 11
for i in range(1, len(S)+1):
    s = S[i:]+S[:i]
    s = re.sub(r'\b0+(?!\b)', '', s)
    if s[0] in '+-' or s[len(s)-1] in '+-':
        continue
    try:
        ans = max(ans, eval(s))
    finally:
        pass
print(ans)