除以个数QAQ?
by VioletIsMyLove @ 2020-10-28 21:40:23
圆排列?(n-1)!
by 无秒 @ 2020-10-28 21:41:34
开个数组,存两个这样的数列,例如:
12345->1234512345
然后跑个字符串匹配 ~~(KMP!~~
by HMP_Haoge @ 2020-10-28 21:46:19