golfish, 59 bytes

Result

AC

Duration

1004ms

Code [DL]

00000000  d0 e2 80 c0 e0 d1 10 01  c0 05 c0 d4 14 ed e2 d8  |................|
00000010  14 ed 80 e0 81 00 d1 06  e2 c0 c1 c1 e1 e1 80 e3  |................|
00000020  ec ed c0 11 d1 e1 e2 ed  14 d2 e3 ed 20 da c0 05  |............ ...|
00000030  c0 01 80 00 ff 06 12 c2  33 d1 e1                 |........3..|
0000003b

stdin

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                     K11111

stderr

/root/golfish/golfish.rb:79: warning: constant ::Fixnum is deprecated
/root/golfish/golfish.rb:280: warning: constant ::Fixnum is deprecated

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffd90df3460 /* 9 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x562530bd2068 /* 9 vars */ <unfinished ...>
12    execve("/usr/local/ruby-2.6.3/bin/ruby", ["/usr/local/ruby-2.6.3/bin/ruby", "/root/golfish/golfish.rb", "/volume/CODE"], 0x562530bd2090 /* 9 vars */ <unfinished ...>
11    <... execve resumed> )            = 0
12    <... 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=15, si_stime=3} ---
10    +++ exited with 0 +++