[alpap]

Код:

@echo off
setlocal enabledelayedexpansion
set "f=file.txt"
<"%f%">>$ (for /f "tokens=2,3* delims=|" %%a in ('more') do @set/a x=%%b%%2& if !x!==0 set/a y=%%b/2& echo %%a^|!y!^|%%c)
<$>"%f%" (for /f "delims=" %%a in ('more^|sort/+10') do @set/a n+=1& echo !n!^|%%a)& del $
exit

.