摘要：
Description: Given an array A of integers, return true if and only if we can partition the array into three non-empty parts with equal sums. Formally, 阅读全文
摘要：
Description: 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 阅读全文
摘要：
Description: We have an array A of integers, and an array queries of queries. For the i-th query val = queries[i][0], index = queries[i][1], we add va 阅读全文