摘要：
Ashish has a tree consisting of nn nodes numbered 11 to nn rooted at node 11 . The ii -th node in the tree has a cost aiai , and binary digit bibi is 阅读全文
摘要：
Ayush and Ashish play a game on an unrooted tree consisting of nn nodes numbered 11 to nn. Players make the following move in turns: Select any leaf n 阅读全文
摘要：
Shubham has a binary string ss. A binary string is a string containing only characters "0" and "1". He can perform the following operation on the stri 阅读全文
摘要：
A. Odd Selection time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Shubham has an array aa 阅读全文