@echo off
setlocal enabledelayedexpansion

pushd jpg

for /f "usebackq" %%a in (` dir /b *.jpg `) do (
	set /a n+=1
	set /a m=!n! %% 2
	if !m! == 1 (
		echo move %%a 1
	) else (
		echo move %%a 2
	)
)

popd

pause
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@echo off
set "Folder1=试卷"
set "Folder2=答案"
md "%Folder1%" "%Folder2%" 2>nul
setlocal enabledelayedexpansion
for /f "delims=" %%a in ('dir /b /a-d *.jpg') do (
    set /a n+=1
    set /a m=!n!%%2
    if !m! == 1 (
        move "%%a" "%Folder1%\"
    ) else (
        move "%%a" "%Folder2%\"
    )
)
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