摘要：
A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below).The robot can only move either down or right at any po... 阅读全文
摘要：
Given two numbers represented as strings, return multiplication of the numbers as a string.Note: The numbers can be arbitrarily large and are non-nega... 阅读全文
摘要：
ktv如果唱这首应该很爽，慢慢学。红(くれない) 歌手：X JAPAN作词：YOSHIKI作曲：YOSHIKII could not look back you'd gone away from meI felt my heart ache I was afraid of following y... 阅读全文
摘要：
Given a binary tree, flatten it to a linked list in-place.For example,Given 1 / \ 2 5 / \ \ 3 4 6The flattened t... 阅读全文
摘要：
Given a string S and a string T, count the number of distinct subsequences of T in S.A subsequence of a string is a new string which is formed from th... 阅读全文
摘要：
Divide two integers without using multiplication, division and mod operator.这道题要AC也不容易，许多基础概念不懂。最后看了答案，自己再做也很难AC。还是要记住一些关键点才行：1. 负数的补码等于反码+1.所以负数取绝对值就... 阅读全文
摘要：
32位平台char 1个字节8位short 2个字节16位int 4个字节32位long 4个字节long long 8个字节指针 4个字节64位平台char 1个字节short 2个字节int 4个字节long 8个字节long long 8个字节指针 8个字节范围char -128 ~ +127... 阅读全文