Usually, I write my code on Sublime text (it has some interesting features), then run it on a local IDE (Code::Blocks for C++), or an online IDE(like C++ shell, but it's not really practical, since you can't copy/paste input from contest to IDE). I still use this method during contests that take place on other platforms.However, onn CodeForces, I use the Custom Test machine that is provided in the contest. Actually, it is pretty fine, and even if it's not as visually comfortable as Sublime Text, it is good, and, being an IDE, it avoids me some drawbacks of Sublime Text which is just an Editor. It's also pretty fast, compared to other online IDEs such as CodeChef's and AtCoder's (Based on personnal experience). Moral of the story, I advise using the Custom Test of CodeForces. If you don't like it, I advise downloading Sublime Text and/or an IDE to compile and run your code. I hoped my advice was helpful. Happy coding!

I use only SublimeText on Linux. Before switching I was on Code::Blocks and Windows. Major drawback on previous setup for me was: you couldn't compile/run another code before closing cmd. It isn't issue for me now (and compilation on linux is faster)

Before : Windows + Code::Blocks + Hightail

Currently : Linux + Sublime text 3 + (Hightail || Sublime Input method as a comment)

I write code in Dev c++ and run it on hackerrank

I use VIM with some modifications so that F5 is compile and run. That way I barely need to exit to type commands in the terminal (I can never remember them).

Also wrote a script to open vim and all the relevant input files so I don't have to do it myself.

For sample test I just paste it to a text file and run the program (you can use preprocessor stuff so that your code reads in input from some text file).

sublime text and copy pasting test cases and manually writing compilation command to terminal

Geeks for Geeks IDE...code and run online :)

personally i like codeforces IDE ,here i can copy sample test and run it there , which is comfortable and saves time .

I use devc++ to write and compile my code.

For Java, you could go with IntelliJ Idea(or Eclipse). IntelliJ has many good features for development too. Infact, I personally find it's debugger very useful. Besides, you can get all the Jetbrains product for free on a Student ID.

I used to write code in Eclipse few years ago. I could install it for Windows and use it in World Finals. I'm not using Windows anymore neither Eclipse (it was total crap btw).

I started using vim, but it's not very easy, and for sure you will need several plugins and customization before feeling comfortable. Personally I found vimrc from misof very useful, and is the core of my current vimrc ( https://people.ksp.sk/~misof/programy/vimrc.html ). Note that I don't use vim for competitive programming anymore, but I use it for a lot of other things.

Then I start writing code on Sublime. Sublime is blazing fast and was all I needed in my slow computer to write code for competitive programming. It has very basic features, but if you feel comfortable writing code in your language, it is ok.

Finally I think vscode is my goto editor for competitive programming. It is very fast (not as fast as Sublime though) but has greater community and much more useful extensions and tooling.

I started to develop an extension for vscode to write code in competitive programming. You can install it from the marketplace. It is called acmX.

• https://github.com/mfornet/acmx
• https://marketplace.visualstudio.com/items?itemName=marx24.acmx

You can see a brief example of how to use it here: https://youtu.be/ouCU9xyW1i8

I created this Telegram group for the extension https://t.me/joinchat/FksZ0BSkGh7anvpFYisjMw.

Sublime text 3 and Ubuntu terminal with auto-complete disabled in Sublime because it just adds std:: to everything during auto complete. I use the following aliases for running code.

alias cpc="cp 00.cpp"
q() {
	g++ -std=c++11 $1 && ./a.out
}
alias py="python2"
alias py3="python"

Here 00.cpp is my skeleton/template code for contest which consists of only 3 lines.

Apart from that I use my personal compiled bits/stdc++.h so that my C++ code compiles in blink of an eye because compiling original bits/stdc++.h still takes few more milliseconds even if pre-compiled for which I wrote a script before.

I write code in the Submit Code tab and press submit to compile. The samples are tested automatically by the tester.

I use far manager. It doesn't have that much special features except you can boast about tourist using it

I use ideone, obviously the most superior ide. ;)

I use CLion on Mac.

I'll recommend u SUBLIME TEXT 3 , its the fastest text editor, with some great features of Snippets and auto-completions.It has separate input and output file system .it has great interface with DARK mode.

Since nobody mention cf-tool I do.

It is a great command line tool to download problems and whole contests with all testdata to the local system, compile/test/run and submit.

It perfectly fits to be used with vim as an editor.

use cp-editor ultra-fast and easy to use. CP-editor

I use sublime text combined with xalanq's very useful cf-tool. Sublime for editing code, cf-tool for debugging and running locally.

I created a plugin for this purpose. https://github.com/suraj-2306/cc_vim.git It opens up an input.txt and an output.txt along with the main .cpp file, in a split-screen config. By hitting F9, you can compile the code and execute it. The expected output is shown in the output.txt buffer while taking input from the input.txt buffer. It uses a custom makefile for compilation and execution of the code. It's pretty helpful if you're starting with cc in vim.ATB

I had to reinstall my setup recently so here's exactly how I have it:

install sublime

install some c++ compiler

change sublime compilation flags to use C++17 -O2 and some other compilation flags like -Wshadow

code with sublime, compile with ctrl+B, run on command line

So yeah, not much is needed.

CLion with JHelper.

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Advantages: I have competitive companion, which parses the test input/output and sends it to JHelper. It's nice I don't have to copy paste the input and so on.

CLion has a bunch of useful stuff. It has a debugger, but I don't use it that much >.< ... it also has a bunch of other features I don't know how to use :P

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I don't use terminal, although I used to use alacritty + vim.

VScode forever.

Far manager