[Georgio]

Код:

@echo off
setlocal enabledelayedexpansion

set "src=list.txt"
set "dest=new_list.txt"

for /f "usebackq tokens=3 delims=|" %%i in ("%src%") do (
 set/a x=%%i/2
 if !x! gtr !max! set/a max=x
)
>"%dest%" (
 for /l %%i in (0 1 %max%) do @(
  for /f "usebackq tokens=2,3* delims=|" %%j in ("%src%") do @(
   set/a x=%%k/2
   if %%i equ !x! (
    set/a n+=1
    echo !n!^|%%j^|%%i^|%%l
   )
  )
 )
)

endlocal
exit/b

[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

.