摘要：
Problem statement In English, we have a concept called root, which can be followed by some other words to form another longer word - let's call this w 阅读全文
摘要：
Problem statement Given a string, your task is to count how many palindromic substrings in this string. The substrings with different start indexes or 阅读全文
摘要：
Problem statement Given a collection of intervals, find the minimum number of intervals you need to remove to make the rest of the intervals non-overl 阅读全文