wa的一声就哭了

dfs序是一种把树状结构改变为线段结构的操作,在之后用树状数组或线段树操作怎么把树状数组改成线状呢?dfs根据dfs搜索的先后,为其赋上新的值例如这个图dfs之后的顺序是A B E FKC G H I1 2 3 4 56 78 9A管辖的范围是A-I=1-9B管辖的范围是B-K=2-5以此类推代码:inli...

There is an apple tree outside of kaka's house. Every autumn, a lot of apples will grow in the tree. Kaka likes apple very much, so he has been carefully nurturing the big apple tree.The tree hasN...