Majority ElementGiven an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the array is non-empty and the major
Excel Sheet Column TitleGiven a positive integer, return its corresponding column title as appear in an Excel sheet. For Example:12345671 -> A2 -> B3 -> C...26 -> Z27 -> AA28 -> AB
Single NumberGiven an array of integers, every element appears twice except for one. Find that single one. Note: Your algorithm should have a linear runtime complexity. Could you implement it without
Valid PalindromeGiven a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. For example:12"A man, a plan, a canal: Panama" is a palindrome.
Best Time to Buy and Sell StockSay you have an array for which the ith element is the price of a given stock on day i. If you were only permitted to complete at most one transaction (ie, buy one and
Pascal’s Triangle IIGiven an index k, return the kth row of the Pascal’s triangle. For example, given k = 3,Return [1,3,3,1]. Note: Could you optimize your algorithm to use only O(k) extra space?
Pascal’s TriangleGiven numRows, generate the first numRows of Pascal’s triangle. For example:Given numRows = 5, Return 1234567[ [1], [1,1], [1,2,1], [1,3,3,1], [1,4,6,4,1]] 提示 解題應用 A