摘要：
This question is the same as "Max Chunks to Make Sorted" except the integers of the given array are not necessarily distinct, the input array could be 阅读全文
摘要：
Given an array arr that is a permutation of [0, 1, ..., arr.length - 1], we split the array into some number of "chunks" (partitions), and individuall 阅读全文
摘要：
Given a string S, check if the letters can be rearranged so that two characters that are adjacent to each other are not the same. If possible, output 阅读全文
摘要：
A matrix is Toeplitz if every diagonal from top-left to bottom-right has the same element. Now given an M x N matrix, return True if and only if the m 阅读全文