import re
s = input()
ans = -10 ** 10
if s[0].isdigit() and s[-1].isdigit():
    ans = eval(re.sub(r'\b0+(?!\b)', '', s))

for i in range(len(s)):
    if i == 0: continue;
    if s[i-1].isdigit() and s[i].isdigit():
        res = eval(re.sub(r'\b0+(?!\b)', '', s[i:]+s[:i]))
        if ans < res: ans = res;        
print(ans)