@echo off
setlocal enabledelayedexpansion
for /f "delims=" %%a in ('dir /b *.jpg') do (
set wtime=%%~ta
set wtime=!wtime:~,4!!wtime:~5,2!!wtime:~8,2!
set k=0
set t=1000
for /f "delims=" %%b in ('dir /b "!wtime!*.jpg" 2^>nul') do set /a k+=1
set /a r=!t!+!k!
set r=_!r:~-3!
if !wtime! == !temp! (
ren "%%a" "!wtime!!r!.jpg"
) else (
set temp=!wtime!
if !k! ==0 (ren "%%a" "!wtime!.jpg") else (ren "%%a" "!wtime!!r!.jpg")
)
)
pause
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