摘要:
##题面 You are given a string s[1…n] consisting of lowercase Latin letters. It is guaranteed that n=2k for some integer k≥0. The string s[1…n] is called 阅读全文
摘要:
##题面 You are given an array a consisting of n integers. You have to find the length of the smallest (shortest) prefix of elements you need to erase fr 阅读全文