@echo off&setlocal enabledelayedexpansion
:lp
set str=
set in=
(set /p in=输入总人数：
set /p m=从第几个开始：
if "!in!"=="%in%" goto :eof
for /l %%a in (1,1,!in!) do (call set str=!str!%%a ))
set str= !str!
set n=
:rep
for %%a in (!str!) do (set/a n+=1
        if !n! equ 3 (set str=!str: %%a = !&set n=0)
)
echo "!str!"
if " !str: =! " neq "!str!" goto :rep
set/a l=(m+!str!+in-1)%%in,1/l>nul||set/a l=in

echo 共有%in%人一起游戏，从第%m%个开始，最后剩下第%l%个
goto :lp
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@echo off
set /p n= 参加游戏人数:
set /p k=从几号开始：
set /p m=报数:
set s=0
for /l %%a in (2,1,%n%) do set /a s=(s+m)%%%%a
set /a x=(s+k)%%n
if %x% equ 0 (set x=%n%)
echo 最后剩下是:%x%
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@echo off
set /a x=13,y=29,z=3,m=0,n=0
setlocal enabledelayedexpansion
:o
for /l %%a in (!x!,1,!y!) do (
    if not defined #%%a (
        set /a m+=1
        set /a l=m%%z
        if !l!==0 (
            set #%%a=false
            set /a n+=1
            if !n! == !y! echo %%a&goto :p
        )
    )
)
if !n! lss !y! set x=1&goto :o
:p
pause
goto :eof
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@echo off
setlocal enabledelayedexpansion
set start=13
set "numbers= "
for /l %%i in (1,1,30) do (
    if !start! equ 31 ( set /a start=1 )
    set numbers=!numbers!!start! 
    set /a start+=1
)
set /a n=1
:loop
if "%numbers:~4%" neq "" (
    for %%i in (%numbers%) do (
        if "!n!" equ "3" ( set "numbers=!numbers: %%i = !" & set /a n=1 )
        set /a n+=1
    )
    goto :loop
)
echo %numbers: =%
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