XpandNotes

exploring the intersection of technology and creativity

Codility Lesson 3 FrogJmp, PermMissingElem, TapeEquilibrium

FrogJmp A small frog wants to get to the other side of the road. The frog is currently located at position X and wants to get to a position greater than or equal to Y. The small frog always jumps ...

Posted by blueskyson on April 20, 2021

Codility Lesson 2 CyclicRotation, OddOccurrencesInArray

CyclicRotation An array A consisting of N integers is given. Rotation of the array means that each element is shifted right by one index, and the last element of the array is moved to the first pl...

Posted by blueskyson on April 20, 2021

Codility Lesson 1 BinaryGap

Description A binary gap within a positive integer N is any maximal sequence of consecutive zeros that is surrounded by ones at both ends in the binary representation of N. For example, number 9 ...

Posted by blueskyson on April 20, 2021

使用 nginx 與 php 架設 key-value storage 服務

此為 2021 網路管理課程的 lab7 設定 php-fpm $ sudo apt install php-cli php-fpm 設定 php-fpm 的 port ，設定檔通常在 /etc/php//fpm/pool.d $ sudo vim /etc/php/7.4/fpm/pool.d/www.conf 將 listen 設為 9000 ... ; The add...

Posted by blueskyson on April 13, 2021

Git 筆記

在本地創建一個 branch 並推送到遠端假設我要新增一個叫 v0.1 的 branch $ git branch v0.1 $ git branch * master v0.1 $ git checkout v0.1 Switched to branch 'v0.1' $ git branch master * v0.1 $ git push -u origin v0.1 $...

Posted by blueskyson on March 28, 2021

解決 VirtualBox 無法自動調整顯示大小

參考資料: https://www.tecmint.com/set-display-screen-resolution-in-ubuntu/ 使用 xrandr 新增自訂義解析度在終端機使用 xrandr 查看目前有哪些解析度 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30...

Posted by blueskyson on March 20, 2021

Windows EFI、ESP 磁區操作

在刪除 linux 雙系統後，常常會在硬碟中殘留 Windows 用不到的 EFI 分割區，可以用以下方式將其清除。刪除 EFI 磁區首先執行 C:\Windows\System32\diskpart.exe 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 DISKPART> list disk 磁碟 ### 狀態 ...

Posted by blueskyson on March 18, 2021

gdisk 新增磁區、mdadm 磁碟陣列、ZFS 設定

此文為計算機系統與網路管理課程 lab4 的實作 gdisk 首先助教分配了 /dev/vdb 和 /dev/vdc 這兩顆磁碟，各自都有 8 GiB 的容量。首先要將它們各自切成 4 GiB 的分割，總共會產生 4 個磁區。因為我是先做完一次了，所以 gdisk 進入時會偵測到 GPT table 已經存在。如果是完全空的磁碟， gdisk 會在記憶體中先創建一個 GPT tabl...

Posted by blueskyson on March 18, 2021

Leetcode #7 Reverse Integer

Description Given a signed 32-bit integer x, return x with its digits reversed. If reversing x causes the value to go outside the signed 32-bit integer range [-231, 231 - 1], then return 0. Assum...

Posted by blueskyson on February 26, 2021

Leetcode #6 ZigZag Conversion

Description The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) P A H ...

Posted by blueskyson on February 24, 2021