发布时间：2015-06-27 19:10:44
//Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules.<br />//<br />//The Sudoku board could be partially filled, where empty cells are filled with the character '.'.<br />//<br />//<br />//A partially filled sudoku which is valid.<br />//<br />//Note:<br />//A valid Sud.........【阅读全文】
发布时间：2015-05-29 14:23:16
//Given a sorted array of integers, find the starting and ending position of a given target value.////Your algorithm's runtime complexity must be in the order of O(log n).////If the target is not found in the array, return [-1, -1].////For example,//Given [5, 7, 7, 8, 8, 10] and target value.........【阅读全文】
发布时间：2015-05-25 18:55:28
//Suppose a sorted array is rotated at some pivot unknown to you beforehand.////(i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2).////You are given a target value to search. If found in the array return its index, otherwise return -1.////You may assume no duplicate exists in the array.public .........【阅读全文】
发布时间：2015-05-02 10:53:04
//Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring.////For "(()", the longest valid parentheses substring is "()", which has length = 2.////Another example is ")()())", where the longest valid parentheses substrin.........【阅读全文】
