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UVA - 11038 How Many O's? (计数)
Description Problem E: How many 0's? A Benedict monk No. 16 writes down the decimal representations of all natural numbers between and including m and n, m ≤ n. How many 0's will he write down? ...
分类:其他好文   时间:2014-08-20 19:42:02    阅读次数:224
Mac commands
/System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/javauname -a显示系统隐藏文件。在终端(Terminal)中输入如下命令:defaults write ~/Library/Preferences/c...
分类:其他好文   时间:2014-08-20 19:33:42    阅读次数:206
C/C++ 父子进程之间的文件描述符问题
在C程序中,文件由文件指针或者文件描述符表示。ISO C的标准I/0库函数(fopen, fclose, fread, fwrite, fscanf, fprintf等)使用文件指针,UNIX的I/O函数(open, close, read, write, ioctl)使用文件描述符。下面重点来说下...
分类:编程语言   时间:2014-08-20 16:15:52    阅读次数:274
【Leetcode】Search in Rotated Sorted Array II
Follow up for "Search in Rotated Sorted Array":What if duplicates are allowed?Would this affect the run-time complexity? How and why?Write a function ...
分类:其他好文   时间:2014-08-20 13:47:32    阅读次数:224
POJ 3187 Backward Digit Sums(next_permutation)
Description FJ and his cows enjoy playing a mental game. They write down the numbers from 1 to N (1 <= N <= 10) in a certain order and then sum adjacent numbers to produce a new list with one fewer...
分类:其他好文   时间:2014-08-20 10:33:36    阅读次数:256
CC150 - 11.2
Question:Write a method to sort an array of strings so that all the anagrams are next to each other. 1 package POJ; 2 3 import java.util.Arrays; 4 im....
分类:其他好文   时间:2014-08-20 02:41:34    阅读次数:199
CC150 - 11.1
Question:You are given two sorted arrays, A and B, where A has a large enough buffer at the end to hold B.Write a method to merge B into A in sorted o...
分类:其他好文   时间:2014-08-19 23:51:25    阅读次数:309
mmap。
linux mmap 内存映射mmap() vs read()/write()/lseek()通过strace统计系统调用的时候,常常能够看到mmap()与mmap2()。系统调用mmap()能够将某文件映射至内存(进程空间),如此能够把对文件的操作转为对内存的操作,以此避免很多其它的lseek()...
分类:其他好文   时间:2014-08-19 22:21:55    阅读次数:339
OpenWrt 开发版本主trunk MT7620N 无线驱动bug
环境: OpenWrt Development Trunk:  svn co svn://svn.openwrt.org/openwrt/trunk/ BUG: 1. 无线无法建立连接. 2. 无线建立连接获取IP地址失败,断开连接. 出现问题的时候会伴随以下dmesg [ 3702.380000] ieee80211 phy0: rt2x00queue_write_tx...
分类:其他好文   时间:2014-08-19 20:57:55    阅读次数:678
POJ 3304 计算几何
Segments Time Limit: 1000MS  Memory Limit: 65536K Total Submissions: 9564  Accepted: 2943 Description Given n segments in the two dimensional space, write a program, which determines if ther...
分类:其他好文   时间:2014-08-19 19:12:15    阅读次数:249
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