77七

@echo off
if exist "A.txt" (
	call :1 "A.txt"
) else (
	echo :setup
)
pause
exit
	:1
	if %~z1 geq 5 if %~z1 leq 300 (
		echo :run
	) else (
		del "%~1"
		echo :setup
	)
	exit /b
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