s = input()
res = eval(s)

dg = "01234567889"

for i in range(0, len(s) - 1):
    if s[i] not in dg or s[i + 1] not in dg:
        continue
    t = s[i + 1:len(s)]
    t += s[0:i + 1]
    res = max(res, eval(t))
print(res)