iovec结构体定义及使用 (转)

I/O向量(struct iovec)readv(2)与writev(2)函数都使用一个I/O向量的概念。这是由所包含的文件定义的:#include <sys/uio.h> 头文件定义了struct iovc,其定义如下:1 struct iovec {2 ptr_t
11次阅读

Technocup 2017 - Elimination Round 1 (Unofficially Open for Everyone, Rated for Div. 2) D

The organizers of a programming contest have decided to present t-shirts to participants. There are six different t-shirts sizes in this problem: 
45次阅读

Technocup 2017 - Elimination Round 1 (Unofficially Open for Everyone, Rated for Div. 2) C

This is an interactive problem. You should use flush operation after each printed line. For example, in C++ you should usefflush(stdout), in
45次阅读

Technocup 2017 - Elimination Round 1 (Unofficially Open for Everyone, Rated for Div. 2) B

Vasily exited from a store and now he wants to recheck the total price of all purchases in his bill. The bill is a string in which the names of the pu
51次阅读

Technocup 2017 - Elimination Round 1 (Unofficially Open for Everyone, Rated for Div. 2) A

Vasily has a number a, which he wants to turn into a number b. For this purpose, he can do two types of operations:multiply the current numb
53次阅读

Linux五种IO模型性能分析

socket阻塞与非阻塞,同步与异步作者:huangguisu 1. 概念理解      在进行网络编程时,我们常常见到同步(Sync)/异步(Async),阻塞(Block)/非阻塞(Unblock)四种调用方式:同步:  &n
10次阅读

LaTex: Undefined citation warnings 解决方法

参考Undefined citationsLaTex: Undefined citation warnings 解决方法在使用TexMaker编译文献的时候,出现引用参考文献的问题:Package natbib Warning: Citation `xxxxx' on page y unde
24次阅读

Educational Codeforces Round 25 E. Minimal Labels 拓扑排序+逆向建图

E. Minimal Labelstime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard outputYou are given a directed acyclic
30次阅读

Educational Codeforces Round 24 E

Vova again tries to play some computer card game.The rules of deck creation in this game are simple. Vova is given an existing deck of n car
28次阅读

Educational Codeforces Round 24 D

Alice and Bob got very bored during a long car trip so they decided to play a game. From the window they can see cars of different colors running past
26次阅读