摘要： 题目： Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structurally identic 阅读全文

摘要： 题目： Write a function to delete a node (except the tail) in a singly linked list, given only access to that node. Supposed the linked list is 1 -> 2 -> 阅读全文

摘要： 题目： Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero elements. For example, 阅读全文