摘要：Given a binary tree, return the inorder traversal of its nodes' values.For example:Given binary tree [1,null,2,3], 1 \ 2 / 3return [1,3,2].Note: Recursive solution is trivial, could you ... 阅读全文

摘要：Given a sorted linked list, delete all duplicates such that each element appear only once.For example,Given 1->1->2, return 1->2.Given 1->1->2->3->3, return 1->2->3.C++ Solution:/** * Definition for ... 阅读全文

摘要：题目：Given two binary strings, return their sum (also a binary string).For example,a = "11"b = "1"Return "100".这道题目是一个字符串处理人位上进行运算，不清楚Python封闭好了，实现起来会不会比较麻烦。Java这里如果可以像C/C++ 直接进行二进制运算的话，也是一处思路。我刚开始一上手做起... 阅读全文

摘要：Given a non-negative integer represented as a non-empty array of digits, plus one to the integer.You may assume the integer do not contain any leading zero, except the number 0 itself.The digits are s... 阅读全文

摘要：Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string.If the last word does not exist, return 0.Note: A word is defined a... 阅读全文

摘要：Do a lot of material ! asdfa sdgadfasdgAndroid is ok, IOS is also ok. 阅读全文