标签： 算法

Given an array of numbers nums, in which exactly two el…

Given a non-empty array of integers, every element appe…

Implement a trie with insert, search, and startsWith me…

All DNA is composed of a series of nucleotides abbrevia…

Given an array of n positive integers and a positive in…

Given a 2d grid map of ‘1’s (land) and ‘0’s (water), co…

Given a range [m, n] where 0 <= m <= n <= 2147…

Given a string s, find the longest palindromic substrin…