该节是有关于数据库权限的文章
grant all privileges on *.* to ua% with grant option;
给与用户ua%最高的权限 revoke all privileges on *.* from ua%;
回收所有权限 注意一点,已经存在的连接是不会有全部权限的的,因为在创建连接的时候࿰…
7. Reverse Integer
Given a signed 32-bit integer x, return x with its digits reversed. If reversing x causes the value to go outside the signed 32-bit integer range [ − 2 31 , 2 31 − 1 ] [-2^{31}, 2^{31} - 1] [−231,231−1], then return 0.
Assume the …