Given a digit string excluded 01, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below.
样例 给定 “23” 返回 [“ad”, “ae”, “af”, “bd”, “be”,…
一、字符及字符串相关
字符串的实际长度(10)与数组长度(12)不相等,在存放上面10个字符之外,系统对字符数组最后两元素自动填补空字符′\0′。
char str[]″I am happy″;char str[]{″I am …
比较简单的html语言识别 ,反正就暴力处理吧,进一步的话可以把标签都保存下来,判断匹配问题,题目没要求就没写 输入
<html>
i like the book <tag> this is a tree\n abs </tag>like father like son
</ht…
A题:
A题题目链接
题目描述: A. Guest From the Pasttime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard outputKolya Gerasimov loves kefir very much. He lives in year 1984 and knows all the de…