A题:刘少瑞
题解:https://blog.csdn.net/kangyupl/article/details/105980727
(PS)学习资料【倍增LCA】链接:https://www.cnblogs.com/lbssxz/p/11114819.html
A题:刘少瑞
题解:https://blog.csdn.net/kangyupl/article/details/105980727
(PS)学习资料【倍增LCA】链接:https://www.cnblogs.com/lbssxz/p/11114819.html