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ubuntu using latex problems and solutions
Problem 1: input ptmr7t' failed to make ptmr7t.tfmthis is a problem for missing times font. i.e. you used "usepackage{times}" in your tex file.If you....
分类:其他好文   时间:2014-09-22 22:50:43    阅读次数:264
Binary String Matching
Binary String Matching 时间限制:3000 ms  |  内存限制:65535 KB 难度:3 描述 Given two strings A and B, whose alphabet consist only ‘0’ and ‘1’. Your task is only to tell how many times does A appear as ...
分类:其他好文   时间:2014-09-18 11:34:53    阅读次数:178
不重启mysqld更改root密码
Ever found yourself working on a MySQL server where root’s password is unavailable? It has happened to me a few times, always because the person who s...
分类:数据库   时间:2014-09-17 11:39:32    阅读次数:347
Codeforces Round #266 (Div. 2) A. Cheap Travel
Ann has recently started commuting by subway. We know that a one ride subway ticket costs a rubles. Besides, Ann found out that she can buy a special ticket for m rides (she can buy it several times...
分类:其他好文   时间:2014-09-15 10:05:28    阅读次数:320
HDU 5000 Clone(离散数学+DP)(2014 ACM/ICPC Asia Regional Anshan Online)
Problem DescriptionAfter eating food from Chernobyl, DRD got a super power: he could clone himself right now! He used this power for several times. He...
分类:其他好文   时间:2014-09-14 12:39:27    阅读次数:299
关于等价标准形的专题讨论
$\bf命题:$任意方阵$A$均可分解为可逆阵$B$与幂等阵$C$之积1$\bf命题:$任意方阵$A$均可分解为可逆阵$B$与对称阵$C$之积1$\bf命题:$设$A,B \in {P^{n \times n}}$,且$r\left( A \right) + r\left( B \right) \l...
分类:其他好文   时间:2014-09-13 13:20:15    阅读次数:245
关于相似标准形的专题讨论
相似对角化$\bf命题:$设$n$阶方阵$A$特征值互异,且$B$与$A$有相同特征值,则存在可逆阵$P$及矩阵$Q$,使得$A = PQ,B = QP$1$\bf命题:$设$A,B \in {R^{2 \times 2}}$,且${A^2} = {B^2} = E,AB + BA = 0$,则存在...
分类:其他好文   时间:2014-09-13 13:15:35    阅读次数:175
repeat a string in java
if I want to repeat "hello" four times as a new string-> "hellohellohellohello". I can:return new String(new char[4]).replace("\0", "hello")
分类:编程语言   时间:2014-09-10 19:15:20    阅读次数:199
css基础(二)
一、元素内容的字体属性1、font-family 字体名称,例如:宋体,新罗马字体等注意:1、不能使用偏僻的字体,要使用安全字体,如:arial;verdana;times new roman 及宋体等; 2、可以同时制定多个字体,用逗号分隔,如果第一个字体不存在,浏览器可以使用后面的字体;...
分类:Web程序   时间:2014-09-10 01:36:09    阅读次数:198
HNOI 2014
D1T1:画框 frame题意:给你两个n阶正整数方阵,请你求最大的\( \sum_{i = 1}^{n} A_{i, p_i}\times \sum_{i = 1}^{n} B_{i, p_i} \)其中\({p_i}\)是一个n的排列。\(n \le 70\)。如果A=B,这就是一个二分图最大完...
分类:其他好文   时间:2014-09-09 15:56:38    阅读次数:354
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