题目： Given a set of distinct integers, S, return all possible subsets. Note: Elements in a subset must be …

Course Schedule There are a total of n courses you have to take, labeled from 0 to n …

题目描述 Given a singly linked list, determine if it is a palindrome. Follow up: Could you do it in O(n) time and …

Unique Substrings in Wraparound String Consider the string s to be the infinite wraparound string of "abcdefgh…

题目 You are given two non-empty linked lists representing two non-negative integers. The digits are stored in r…

欢迎fork and star：Nowcoder-Repository-github 105. Construct Binary Tree from Preorder and Inorder Traversal 题目 G…

  In the “100 game,” two players take turns adding, to a running total, any integer from 1..1…

题目描述 Given a sorted array, remove the duplicates in place such that each element appear only once and return t…

Given a binary tree, imagine yourself standing on the right side of it, return the values of the nodes you can…

题目描述 Follow up for H-Index: What if the citations array is sorted in ascending order? Could you optimize your …

近一年没有写代码了，手痒无聊，集中刷了近一百题，前一半按序全部做了，后面的挑了有意思的做，一眼看起来太简单的且重复类型的就忽略了。最近挑的题，发现没有了自测按钮，不太方便。暂时不再刷题了。开启新的一章，学习“机器学习”，…

  Check whether the original sequence org can be uniquely reconstructed from the sequences in seqs. The o…