[amel27]

до кучи:

Код:

pushd "D:\"||exit
set/a "$1=0,$2=1"
set/p .=.>%$2%.tmp<nul
:loop
set/a "$1+=1,$2+=1"
copy/b %$1%.tmp+%$1%.tmp %$2%.tmp>nul 2>&1 && goto:loop
set/a "$1-=2,$2-=1"
if %$1% geq 0 goto:loop