abc, 76 bytes

Result

AC

Duration

799ms

Code [DL]

WHILEe>0:
	READsRAW
	IF s@3|1=s@2|1:WRITE s@3|1
	IF s@3|1<>s@2|1:WRITE s@5|1

stdin

432 583
825 853
227 426
684 332
799 975
892 298
711 316
588 118
398 847
252 572
254 954
287 783
855 554
536 113
237 775
355 839
547 573
134 416
988 685
259 524
261 668
429 993
711 694
412 745
875 341
733 993
115 153
645 459
937 331
366 612
388 886
927 447

stdout

58439218859751755485691733143684

stderr

*** Cannot find or read messages file; using numbers
 (message 3119)  (message 3100)     READ s RAW
 (message 3113)  (message 3111)  (message 3114)   (message 3807) 

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffd371752c0 /* 8 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x55c3f6658bd8 /* 8 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("/root/ABC/abc", ["/root/ABC/abc", "/volume/CODE"], 0x55c3f6739f48 /* 8 vars */ <unfinished ...>
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 resumed> )            = 0
13    +++ exited with 1 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13, si_uid=0, si_status=1, si_utime=0, si_stime=0} ---
10    +++ exited with 1 +++