from collections import deque

Que = deque(list(input()))

n = len(Que)
ans = 0
for _ in range(n):
    s = ''.join(Que)
    if s[0] not in ['-', '+'] and s[-1] not in ['-', '+']:
        ans = max(ans, eval(s))
    temp = Que.pop()
    Que.appendleft(temp)
print(ans)