bash-busybox, 58 bytes

Result

AC

Duration

849ms

Code [DL]

while read s;do echo ${s:$[${s:1:1}==${s:2:1}?2:4]:1};done

stdin

766 776
198 975
622 623
176 649
911 148
255 774
188 887
982 815
988 187
955 136
987 198
911 119
668 882
812 889
817 117
311 199
177 354
175 375
929 299
225 526
157 174
442 242
167 963
393 935
932 334
318 283
583 842
679 552
821 532
715 739
672 223
267 755

stdout

6
9
2
6
1
5
8
8
8
5
1
1
8
8
1
1
7
3
2
5
1
2
9
9
3
2
8
5
5
7
2
7

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffdb958ea40 /* 9 vars */) = 0
11    execve("/usr/bin/realpath", ["realpath", "/volume/CODE"], 0x56366f744d18 /* 9 vars */) = 0
11    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=11, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
12    execve("/bin/cp", ["cp", "-f", "/volume/CODE", "/opt/jails/bash-busybox/code.bas"...], 0x56366f744d68 /* 9 vars */) = 0
12    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
13    execve("/bin/cat", ["cat", "-"], 0x563670b8b0d8 /* 9 vars */) = 0
14    execve("/usr/sbin/jk_chrootlaunch", ["jk_chrootlaunch", "-j", "/opt/jails/bash-busybox", "-x", "/bin/bash", "/code.bash"], 0x563670b8b1c0 /* 9 vars */) = 0
13    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
14    execve("/bin/bash", ["/bin/bash", "/code.bash"], 0x7ffe65088470 /* 9 vars */) = 0
14    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=14, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
15    execve("/bin/rm", ["rm", "/opt/jails/bash-busybox/code.bas"...], 0x56366f744cc8 /* 9 vars */) = 0
15    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=15, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
10    +++ exited with 0 +++