Algorithms-Snippets

Contains build systems (cpp build systems) and competitive coding algorithms snippet for sublime text 3. Please contribute (add new algorithms or improve existing algorithms) to make it perfect.

Intention
Download And Setup
Adding Build Systems
- Build System - 1
- Build System - 2 (For Linux Only)
Adding Snippets

Intention

The main intention behind this repository is to help beginners in setting up cpp enviroment for competitive coding and making them familiar with build-systems and snippets to improve their coding speed.

Every competitive programmer faced one question at some point of time that which is best IDE? which IDE use to do competitive programming?.

Here is the answer, "Sublime Text 3" is one of the best IDE (might not best but definitely one of the best IDEs after all its all depends on coders choice), so here are some tricks in sublime text 3 for fast and efficient competitive programming.

Download And Setup

First of all check whether gcc/g++ compiler is installed in your machine or not, and if not then install it.

For Linux - https://www.youtube.com/watch?v=mqHdXCMmOXM

For Windows- https://www.youtube.com/watch?v=r3FJta3RD0s
You can download sublime text 3 from https://www.sublimetext.com/3.
To enable sidebar(sidebar show all open files/folders make navigation between files easy) go to

View > Sidebar > Show Sidebar
To add folder to sidebar(after adding folder to sidebar, all files inside folder will be displayed in sidebar) go to

Project > Add Folder To Project > Select Folder

Adding Build Systems

Build System - 1

To compile and run cpp code from sublime text 3 itself on click of "ctrl+shift+B" we have to create build system. In this Build System cpp code will read input from file "input.txt" and will write output to file "output.txt".

Here is the screenshot of how it will looks and works -
First of all create two files named as "input.txt" and "output.txt" in current working directory(folder containing cpp file).

Note - The cpp file you compile and run must be in same folder as both of this file else it will give error as build system will not found file to read input and write output of cpp code.

To provide input to cpp code you have to write input in file "input.txt" and code will write output to "output.txt". To make it(providing input and reading output) easy, we will always keep "input.txt" and "output.txt" open as shown in above screenshots. To open such layout select
- View > Layout > Columns: 3
- View > Groups > Max Columns: 2
- Then open "input.txt" in upper right window and "output.txt" in lower right window and resize them according to your prefrences.
I will suggest you to keep "input.txt" and "output.txt" always open in upper right and lower right windows while open your cpp code in left window and all your logic goes there.

We are done with taking input and writing output now we have to write script to compile and run cpp code.

To create build system go to

Tools > Build System > New Build System

For Linux

Copy paste given code and save it with name linux_cpp_1.sublime-build

{
  "shell_cmd": "g++ \"${file}\" -o \"${file_path}/${file_base_name}\" && \"${file_path}/${file_base_name}\" <input.txt >output.txt",
  "file_regex": "^(..[^:]*):([0-9]+):?([0-9]+)?:? (.*)$",
  "working_dir": "${file_path}",
  "selector": "source.c, source.c++, source.cpp",
}

For Windows

Copy paste given code and save it with name windows_cpp.sublime-build

{
  "cmd": ["g++.exe", "${file}", "-o", "${file_base_name}.exe", "&&" , "${file_base_name}.exe<input.txt>output.txt"],
  "shell":true,
  "working_dir":"$file_path",
  "selector": "source.c, source.c++, source.cxx, source.cpp", 
}

To enable build system select
- For Linux
  
  Tools > Build System > linux_cpp_1
- For windows
  
  Tools > Build System > windows_cpp

To compile and run code, press "ctrl+shift+B".

Note- while compiling and running code(when you press "ctrl+shift+B"), the tab/window containing cpp code should be active because build system will try to compile active tab/window and if input.txt/output.txt will be active then it will try to compile and run it and it will give error.

Build System - 2 (For Linux Only)

To compile and run cpp code in terminal from sublime text 3 on click of "ctrl+shift+B" we have to create build system.

Here is the screenshot of how it will looks and works -

To create build system select

Tools > Build System > New Build System

copy paste given code and save it with name linux_cpp_2.sublime-build

{ 
  "cmd": ["g++", "$file", "-o", "${file_path}/${file_base_name}"], 
  "file_regex": "^(..[^:]*):([0-9]+):?([0-9]+)?:? (.*)$", 
  "working_dir": "${file_path}", 
  "selector": "source.c, source.c++, source.cxx, source.cpp", 
  "variants": 
  [ 
    { 
      "name": "Run", 
      "shell": true, 
      "cmd": ["gnome-terminal -e 'bash -c \"${file_path}/${file_base_name};echo;echo Press ENTER to continue; read line;exit; exec bash\"'"] 
    } 
  ] 
}

To enable build system select

Tools > Build System > linux_cpp_2

To compile code

Press "ctrl+shift+B" and then select "linux_cpp_2".

To run compiled code

Press "ctrl+shift+B" and then select "linux_cpp_2 - Run".

Note- while compiling and running code(when you press "ctrl+shift+B"), the tab/window containing cpp code should be active because build system will try to compile active tab/window and if input.txt/output.txt will be active then it will try to compile and run it and it will give error.

Adding Snippets

Snippets are templates that will be inserted when corresponding shortcut is pressed. You can download snippets for various algorithms provided under section "template".
- How snippet works ?
- How snippet is created ?
- You can create your own snippet to improve your coding speed. To learn more about snippets explore -
  - Blog - https://www.granneman.com/webdev/editors/sublime-text/top-features-of-sublime-text/quickly-insert-text-and-code-with-sublime-text-snippets
  - Video - https://www.youtube.com/watch?v=r_qrOaAFm7w

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