standback, 38 bytes

Result

WA

Duration

929ms

Code [DL]

g/.*(.)(\1| ).*/%1/m/[\s\S]*/S//%%&///

stdin

833 337
258 884
461 215
822 441
922 355
982 864
673 778
455 773
485 878
233 954
176 563
161 199
878 553
533 438
922 224
187 791
383 856
594 765
453 534
315 819
747 624
442 241
611 189
845 451
547 745
544 481
199 139
661 556
323 336
398 998
955 655
468 767

stdout

3
8
1
4
5
2
7
7
5
3
6
9
5
3
2
7
3
4
3
5
7
2
1
5
7
4
9
5
3
9
5
8

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffef22b3720 /* 9 vars */) = 0
12    execve("/usr/local/ruby-2.7.1/bin/ruby", ["/usr/local/ruby-2.7.1/bin/ruby", "/root/standback/src/standback.rb", "/volume/CODE"], 0x55e23eaa6050 /* 9 vars */ <unfinished ...>
11    execve("/bin/cat", ["cat", "-"], 0x55e23eaa6028 /* 9 vars */ <unfinished ...>
12    <... execve resumed>)             = 0
11    <... execve resumed>)             = 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    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12, si_uid=0, si_status=0, si_utime=4, si_stime=3} ---
10    +++ exited with 0 +++