FZU 2277 Change(dfs序+树状数组)
摘要：
Problem Description There is a rooted tree with n nodes, number from 1-n. Root’s number is 1.Each node has a value ai. Initially all the node’s value 阅读全文
posted @ 2018-09-16 20:05 大桃桃 阅读(222) 评论(0) 推荐(0)
浙公网安备 33010602011771号