2019年11月22日
ARC081E. Don't Be a Subsequence
摘要： An interesting problem about subsequnces. 阅读全文
posted @ 2019-11-22 12:56 Pat 阅读(206) 评论(0) 推荐(0)
ARC097E. Sorted and Sorted
摘要： A DP problem about inversion number between two permutations. 阅读全文
posted @ 2019-11-22 01:52 Pat 阅读(248) 评论(0) 推荐(0)