arcyou, 119 bytes

Result

AC

Duration

1122ms

Code [DL]

(: x 1)(r(F(s t)(% "%s%s"(a(a(')s)t)))(f c(q)(pn(: x(?(= c "T")0(?(|(= c "K")(> x 49))(- x 50)(+ 1 x))))(?(< x 1)"@" c)

stdin

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                         K                        

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stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7fffd957a600 /* 7 vars */) = 0
11    execve("/usr/bin/realpath", ["realpath", "/volume/CODE"], 0x55ea99116d18 /* 7 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} ---
13    execve("/usr/bin/python3", ["/usr/bin/python3", "arc.py", "/volume/CODE"], 0x55ea9a7a60f0 /* 9 vars */) = 0
12    execve("/bin/cat", ["cat", "-"], 0x55ea9a7a60a8 /* 8 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    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13, si_uid=0, si_status=0, si_utime=29, si_stime=1} ---
10    +++ exited with 0 +++