摘要:
Do you like painting? Little D doesn’t like painting, especially messy color paintings. Now Little B is painting. To prevent him from drawing ... 阅读全文
摘要:
Zero and One are good friends who always have fun with each other. This time, they decide to do something on a tree which is a kind of graph that ther... 阅读全文
摘要:
sd0061, the legend of Beihang University ACM-ICPC Team, retired last year leaving a group of noobs. Noobs have no idea how to deal with mm com... 阅读全文
摘要:
There is a tree with nn nodes, each of which has a type of color represented by an integer, where the color of node ii is cici. The path betwe... 阅读全文
摘要:
On the way to the next secret treasure hiding place, the mathematician discovered a cave unknown to the map. The mathematician entered the cav... 阅读全文