YuriFLAG

摘要： Validate if a given string is numeric. Example "0" => true " 0.1 " => true "abc" => false "1 a" => false "2e10" => true 考察 corner case public class So 阅读全文

摘要： Given a set of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T. The same repeat 阅读全文

摘要： You have two every large binary trees: T1, with millions of nodes, and T2, with hundreds of nodes. Create an algorithm to decide if T2 is a subtree of 阅读全文

摘要： Given a string, find the length of the longest substring without repeating characters. Examples: Given "abcabcbb", the answer is "abc", which the leng 阅读全文

摘要： You need to write a function, which will accept a String and return first non-repeated character, for example in the world "hello", except 'l' all are 阅读全文

摘要： Sort a linked list using insertion sort. 阅读全文

摘要： Given a linked list, return the node where the cycle begins. If there is no cycle, return null. Note: Do not modify the linked list. 阅读全文

摘要： A linked list is given such that each node contains an additional random pointer which could point to any node in the list or null. Return a deep copy 阅读全文

摘要： Given an array where elements are sorted in ascending order, convert it to a height balanced BST. 阅读全文

摘要： Given a linked list and a value x, partition it such that all nodes less than x come before nodes greater than or equal to x. You should preserve the 阅读全文