dkp1024's blog

What is your .vimrc configuration for competitive programming?
By dkp1024, history, 7 years ago, In English

If you are using vim for some time, maybe it will be helpful for new coders like me to know your .vimrc file?
Peace.

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7 years ago, # |
  Vote: I like it +10 Vote: I do not like it

standard vimrc

from /usr/share/vim/vimrc.

mapping(copy current buffer)

nmap <leader>y ggVG"+y''

useful plugins:

vim-surround (deal with parenthesis)

ultisnips and vim-snippets (code snippets)

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7 years ago, # |
  Vote: I like it +5 Vote: I do not like it

Open a new cpp file filled with a template of your choice . autocmd BufNewFile *.cpp -r ~/cp/template.cpp
Autocomplete curly brackets inoremap {<CR> {<CR>}<Esc>i<CR><Esc>ki<Tab><Tab>

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    7 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    This does the wrong indentation, if you define a new global function. inoremap {<CR> {<CR>}<ESC>O fixes and simplifies the command. (btw filetype indent on should be set for either commands to work).

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7 years ago, # |
  Vote: I like it +10 Vote: I do not like it

My .vimrc configuration.

F5 — Compile

F9 — Run

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    7 years ago, # ^ |
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    Mine is F5 compile and run :)

    autocmd filetype cpp nnoremap <F5> :w <bar> !g++-4.8 -ulimit -Wall -Wno-unused-result -std=c++11   -O2   % -o %:r && ./%:r <CR>
syntax on
set nu
set clipboard=unnamedplus
set mouse=a
set tabstop=2
set autoindent
set shiftwidth=2
set softtabstop=2
set smarttab
set expandtab
set smartcase

set t_Co=256
set background=dark
colorscheme monokai 

autocmd filetype java nnoremap <F5> :w <bar> !javac % && java -enableassertions %:r <CR>
autocmd filetype python nnoremap <F5> :w <bar> !python % <CR>
autocmd filetype perl nnoremap <F5> :w <bar> !perl % <CR>
autocmd filetype go nnoremap <F5> :w <bar> !go build % && ./%:r <CR>
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      5 years ago, # ^ |
        Vote: I like it 0 Vote: I do not like it

      i configured it by i. set tabstop=4 ii. set shiftwidth=4 iii. set expandtab but after submitting code in codeforces it still remains tab size 8. which command works to fix this problem?

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        5 years ago, # ^ |
          Vote: I like it 0 Vote: I do not like it

        Maybe you wrote your template in another text editor or before you had configure vim spacing ?

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7 years ago, # |
← Rev. 4   Vote: I like it +13 Vote: I do not like it

Actually there is not really much related to competitive programming in my vimrc. The only mentionable things are my plugins.

YouCompleteMe: intelligent code completion, besides completing variable names, it will also complete functions from the STL and much more. E.g. writing v.pu and hitting tab will complete it to v.push_back if v is a vector, or to v.push if v is a stack. Besides completion, ycm will also check your code for errors and report them to you. So usually you won't get any compile errors, because you seen and corrected them already while writing the code.

ultisnips: lots of short code snippets to make my life easier, my template, some long algorithms, ... E.g. inserting my codeforces template can be done with writing cf<C-J>. Or reading four integers from stdin can be done with readi<C-J>n, m, k, test<C-J> and ultisnips will expand it to int n, m, k, test; and cin >> n >> m >> k >> test; (Demonstration)

vim-commentary: comment/uncomment lines

Conque-GDB: gdb inside vim. I'm not completely happy with it, and most of the time I just use the regular gdb. But that's probably only because so far I was too lazy to adjust a few settings for it.

For my other setup (which might be interesting if you use linux): I additionally use tmux in combination with a few scripts. I've written a start script, that will download all test inputs/outputs of a specific codeforces problem, opens a special tmux session with vim inside. For this session I added a few commands, e.g. prefix t will open another pane, compiles my program, and runs it with each test input and compares the results with the outputs. So checking if my code works only takes one seconds. Here's a short demonstration.

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    6 years ago, # ^ |
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    Can you share those scripts?

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      6 years ago, # ^ |
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      Sorry, but I don't think that I have the original scripts anymore.

      Nowadays I'm just using this vim plugin: cfparser.vim. It basically does the exact same things. E.g. you can download the test cases, compile and run the tests, and even submit the solution.

      The only change I made is, that I use this script for compiling and running the tests, as it gives a better overview over the tests and the results. To run this script with the default key combination, I created the file ~/.vim/after/plugin/cftest.sh with the line nnoremap <Leader>cft :terminal cftest.sh %<CR>.

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    3 years ago, # ^ |
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    hey can you please share how to read multiple inputs like this using ultisnips?

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      3 years ago, # ^ |
      ← Rev. 2   Vote: I like it 0 Vote: I do not like it

      https://pastebin.com/taThf3vr

      Besides reading multiple inputs, it additionally supports autocompletion for common types like int, long long, or even pair<long long, long long>. E.g. you can press read<C-J>pair<l<C-J>a, b<C-J> and it expands to pair<long long, long long> a, b; cin >> a.first >> a.second >> b.first >> b.second;. It will actually show you the possible completions in real time, once there is only one completion, it you can press <C-J> to accept it.

      If you don't need the completion or the support for pairs, you can probably get rid of most of the code, and just use a transformation that converts , into >>. Something like the following (note: I haven't tested it): https://pastebin.com/1P1Ayy6j

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6 years ago, # |
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Compile/Run C++

Save the document, clear console screen, show compile time, redirect compile errors to a file, show runtime, redirect stdin/stdout/stderr from file

nnoremap gb :w<CR>:!printf "\033c" && printf "================\n  Compiling...\n================\n" && time g++ -g -std=c++17 -Wall -Wextra -Wno-unused-result -D LOCAL -O2 %:r.cpp -o %:r 2>&1 \| tee %:r.cerr && printf "\n================\n   Running...\n================\n" && time ./%:r < %:r.in > %:r.out 2> %:r.err && printf "\n\n\n\n"<CR>

Some manual brace autocomplete

inoremap {[ {<CR>}<Esc>O
inoremap {; {<CR>};<Esc>O
inoremap {{ {<CR>}<CR><Esc>kO

Behave like Windows

CTRL+A selects all, CTRL+C and CTRL+V copy/paste to system clipboard, if +clipboard is enabled in Vim compile flags.

source $VIMRUNTIME/mswin.vim
behave mswin
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5 years ago, # |
  Vote: I like it -6 Vote: I do not like it

Hi everyone, how to write default templates for C++ on Vim. Please help me I tried to google a lot on this, all I could find is https://github.com/tibabit/vim-templates which I am finding difficult to understand. Can someone guide me on this? Also if possible share some scripts for increasing efficiency while using Vim, and learning Vim fast :p

Thank you.

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    5 years ago, # ^ |
    ← Rev. 2   Vote: I like it -11 Vote: I do not like it

    Also, I have tried this but I think it's outdated as I am not able to access my template in new files.

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      5 years ago, # ^ |
        Vote: I like it 0 Vote: I do not like it

      The beauty of CF. If I would have posted some meme there would have been lots of upvotes and responses. Here, a valid problem and there comes the downvotes. Keep it up CF!!

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    5 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    If you still have this issue, here is how I do it. As someone mentioned before, you place this in your .vimrc file in your home folder.

    autocmd BufNewFile *.cpp -r /path/to/template.cpp

    You can change /path/to/template.cpp to wherever your template is stored on your drive.

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4 years ago, # |
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Vim like VSCode Got inspired during lockdown and I learnt vim during this time. Here is a link to my neovim config files and you can see the finished config is something really close to VSCode. I spent 2 days learning and making this for NeoVim. If anyone is interested check it out on the given link. https://github.com/AnmolTomer/vim

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