GYM 101853Chttps://codeforces.com/gym/101853/problem/C 洛谷 P1908https://www.luogu.com.cn/problem/P1908Codeforces Round 790 (Div. 4) H2https://codeforces.com/contest/1676/problem/H22022年四川省大学生程序设计竞赛 Ahttps://ac.nowcoder.com/acm/contest/42105/A P5094这道题需要用归并排序的方法,但是不需要求逆序对 洛谷 P5094https://www.luogu.com.cn/problem/P5094