Positive Solutions: Chairman of the tree
Report problem solving:
Too lazy to summarize a paragraph to the effect of hot ,,, quite obviously also $ QwQ $
Ang port and how direct this question did Aung $ QwQ $
First consider if it is a single point of modification, it is a segment tree board Well $ QwQ $
Then now is to modify the interval, the interval for modification, apparently to consider the next check points, it becomes a single point of modification spicy $ QwQ $
Meanwhile queries will become a single point of inquiry interval
Then on the next Chairman of the tree cover is like $ QwQ $
$ Attention $, I think that here there is a little more useful conclusions, you can often take advantage of check grading means a single point of inquiry will modify the interval and the interval query a single point of transition between this modification and the like each other $ QwQ $
Then this little fact in the trees conclusion there are certain application, before the former provincial election $ yyb $ out of $ T2 $, $ zsy $ harbor a method can not remember what the tree can not cross ,,, it seems to be the single point to modify and modify subtrees want to convert ,,,? ,,, I do not remember Liao Kusi $ QAQ $ ,,, if someday an afterthought might ask seniors what lie ,,, $ QAQ $ probably not there will be that day's $ QwQ $
Aung course, this still has some limitations, but it really is a more wonderful way to spicy, or to think more and more mastered Aung $ QwQ $