将01串首先按长度排序，长度相同时，按1的个数多少进行排序，1的个数相同时再按ASCII码值排序

A checksum is an algorithm that scans a packet of data and returns a single number. The idea is that if the packet is changed, the checksum will also change, so checksums are often used for detecting transmission errors, validating document contents, and in ma…

判断一个数是否为对称且不大于五位数的素数。

<p>找出输入数据中所有两两相乘的积为12!的个数。</p>

求若干个整数的平均数。

<p>求两个正整数的最小公倍数。</p>