摘要： Given an array ofnintegers wheren> 1,nums, return an arrayoutputsuch thatoutput[i]is equal to the product of all the elements ofnumsexceptnums[i].Solv... 阅读全文

摘要： Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST.According to thedefinition of LCA on Wikipedia: ... 阅读全文

摘要： Given a singly linked list, determine if it is a palindrome.Follow up:Could you do it in O(n) time and O(1) space?先找到链表中点，将第二部分反转，然后比较两部分链表的值。/** * De... 阅读全文

摘要： Implement the following operations of a queue using stacks.push(x) -- Push element x to the back of queue.pop() -- Removes the element from in front o... 阅读全文

摘要： Given an integer, write a function to determine if it is a power of two.Credits:Special thanks to@jianchao.li.fighterfor adding this problem and creat... 阅读全文

摘要： Given a stringsconsists of upper/lower-case alphabets and empty space characters' ', return the length of last word in the string.If the last word doe... 阅读全文

摘要： Given a sorted integer array without duplicates, return the summary of its ranges.For example, given[0,1,2,4,5,7], return["0->2","4->5","7"].Credits:S... 阅读全文

摘要： Jump GameGiven an array of non-negative integers, you are initially positioned at the first index of the array.Each element in the array represents yo... 阅读全文

摘要： Find the contiguous subarray within an array (containing at least one number) which has the largest sum.For example, given the array[−2,1,−3,4,−1,2,1,... 阅读全文

摘要： Given a collection of numbers, return all possible permutations.For example,[1,2,3]have the following permutations:[1,2,3],[1,3,2],[2,1,3],[2,3,1],[3,... 阅读全文