摘要：
Given a stringS, find the longest palindromic substring inS. You may assume that the maximum length ofSis 1000, and there exists one unique longest pa... 阅读全文
摘要：
Given an array of integers that is alreadysorted in ascending order, find two numbers such that they add up to a specific target number.The function t... 阅读全文
摘要：
Given an array ofnintegersnumsand atarget, find the number of index tripletsi, j, kwith0 <= i < j < k < nthat satisfy the conditionnums[i] + nums[j] +... 阅读全文
摘要：
Given twosparse matricesAandB, return the result ofAB.You may assume thatA's column number is equal toB's row number.Example:A = [ [ 1, 0, 0], [-1, ... 阅读全文