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Hi4ko's blog

Timus, 1793

By Hi4ko, 12 years ago, translation, In English

Problem

My attempt(WA 25)

x — Radius of truncated circle on height h. I can't understand what is false in my solution :(

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timus, geometry

-4

Hi4ko
12 years ago
0

Timus, 1407th Problem

By Hi4ko, 13 years ago, translation, In English

Hello

Problem

I've already got some help. Thanks :)

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java, timus

Hi4ko
13 years ago
0

my DP has WA#8(Timus)

By Hi4ko, 13 years ago, translation, In English

Problem #1036 I've already got some help, Thanks :)

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dinamic, timus

Hi4ko
13 years ago
6

How to compress .pdf files on Linux

By Hi4ko, 13 years ago, translation, In English

I think this topic is quite important because it's a popular problem.

"You scanned pages, made them into one .pdf file and size of this file is 300 mb. But it has to be not more than 30-40 mb". :)
I offer you to discuss compresion methons only for GNU/Linux systems, particularly because of my egoism :) (my OS is Linux Mint 10)

That's the only method I know how to compress:

1. I installed Ghostscript and pdftk (sudo apt-get install ghostscript pdftk);

2. Converted my .pdf (240 mb) in .ps file

(pdf2ps file1.pdf file2.ps) . .ps'll have more size, than your .pdf(I got 400mb).

3. Then I converted this .ps file again to .pdf(ps2pdf file2.ps file3.pdf)

To sum up, I got 9mb .pdf file with the same quality as 240mb's.

If somebody can expain, how can it be or knows any other methods of compression, write in comments)

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pdf, linux

-2

Hi4ko
13 years ago
2

Linux and QtCreator

By Hi4ko, 13 years ago, translation, In English

I think the best C++ IDE on Linux is QtCreator. It looks cute and only in this IDE I can debug STL containers and algos without going to their .h files :D

But sometimes it happens(but not sometimes, often), that you can't cin of scanf in this IDE(or debugger shows you an error ><). You can solve these problems by making these easy steps :)

1. If cin of scanf doesn't work

Tools -> options -> Environment -> System-> Terminal(change to xterm -e)

External Terminal : change to xterm -e -geom %Wx%H+%x+%y -e vi %f +%l +"normal %c|"

In left panel(Projects -> Run settings -> click on "Run in Terminal"

2. If debugger shows you an error, type in Terminal:

sudo echo 0 > /proc/sys/kernel/yama/ptrace_scope

Good luck :)

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linux