发布时间：2015-03-21 16:15:10
The set [1,2,3,…,n] contains a total of n! unique permutations.By listing and labeling all of the permutations in order,We get the following sequence (ie, for n = 3):"123""132""213""231""312""321"Given n a.........【阅读全文】
发布时间：2015-03-20 16:59:15
Validate if a given string is numeric.Some examples:"0" => true" 0.1 " => true"abc" => false"1 a" => false"2e10" => trueNote: It is intended for the problem statement to be ambiguous. You should gather all requirements up f.........【阅读全文】
发布时间：2015-03-20 15:28:48
Combinations Total Accepted: 36487 Total Submissions: 119636My SubmissionsQuestion Solution Given two integers n and k, return all possible combinations of k numbers out of 1 ... n.Fo.........【阅读全文】
发布时间：2015-03-17 11:03:40
Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties:Integers in each row are sorted from left to right.The first integer of each row is greater than the last integer of the previous row..........【阅读全文】
