给定一个算术表达式。 将所有的 “?” 替换为 0 到 9 之间的整数。 求出你能得到的最大结果。 字符串中最多包含 2 个问号。 保证给定的每个整数都在 0 到 9 之间，且给定的字符串是一个合法的算术表达式。 以下是一些定义：
输入格式
第一行包含给定的字符串 $s$。 $s$ 的长度不超过 5000。
输出格式
在一行中输出你能得到的最大值。
样例
输入 1
?+?
输出 1
18
输入 2
(?+9)-(?+1)
输出 2
17
QOJ.ac
QOJ
Límite de tiempo: 1 s
Límite de memoria: 256 MB
Puntuación total: 100
#6750. 计算
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