Real Vim ninjas count every keystroke - do you?

Pick a challenge, fire up Vim, and show us what you got.

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Your VimGolf key: please sign in

$ gem install vimgolf
$ vimgolf setup
$ vimgolf put 541022801a2d8b0002238a17

Roman numerals

Use the substitutions on top to convert unary to Roman numerals.

Start file

IIIII,V
IIII,IV
VV,X
VIV,IX
XXXXX,L
XXXX,XL

III
IIII
IIIII
IIIIIII
IIIIIIIII
IIIIIIIIII
IIIIIIIIIIIIIIIIII
IIIIIIIIIIIIIIIIIIIII
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
 vim: set gdefault:

End file

IIIII,V
IIII,IV
VV,X
VIV,IX
XXXXX,L
XXXX,XL

III
IV
V
VII
IX
X
XVIII
XXI
XXXIX
XL
XLIV
L
LXIV
 vim: set gdefault:

View Diff

9,20c9,20
< IIII
< IIIII
< IIIIIII
< IIIIIIIII
< IIIIIIIIII
< IIIIIIIIIIIIIIIIII
< IIIIIIIIIIIIIIIIIIIII
< IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
< IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
< IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
< IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
< IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
---
> IV
> V
> VII
> IX
> X
> XVIII
> XXI
> XXXIX
> XL
> XLIV
> L
> LXIV

Solutions by @GavinKoeng:

Created by: @udioica Tweet

30 active golfers, 94 entries

Solutions by @GavinKoeng: