z80, 50 bytes

Result

WA

Duration

824ms

Code [DL]

00000000  cd 03 80 cd 03 80 47 cd  03 80 4f 90 20 0d 78 cd  |......G...O. .x.|
00000010  00 80 cd 03 80 cd 03 80  c3 24 00 cd 03 80 cd 03  |.........$......|
00000020  80 cd 00 80 cd 03 80 cd  03 80 cd 03 80 d6 0a 28  |...............(|
00000030  cf 76                                             |.v|
00000032

Disassembly

        ORG     0000h

L0000:  CALL    8003h
        CALL    8003h
        LD      B,A
        CALL    8003h
        LD      C,A
        SUB     B
        JR      NZ,L001B
        LD      A,B
        CALL    8000h
        CALL    8003h
        CALL    8003h
        JP      L0024

L001B:  CALL    8003h
        CALL    8003h
        CALL    8000h
L0024:  CALL    8003h
        CALL    8003h
        CALL    8003h
        SUB     0Ah
        JR      Z,L0000
        HALT

stdin

811 116
788 633
277 856
955 593
362 374
451 751
513 393
513 187
628 225
434 942
179 995
685 889
433 772
768 816
877 379
875 753
454 346
758 135
142 881
657 753
166 334
797 779
922 233
433 337
929 232
913 238
939 733
616 886
629 316
881 813
188 287
998 895

stdout

18753731299838773187672322783888

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffe54b99b90 /* 9 vars */) = 0
12    execve("/usr/bin/z80golf", ["/usr/bin/z80golf", "/volume/CODE"], 0x564f2317bd50 /* 9 vars */ <unfinished ...>
11    execve("/bin/cat", ["cat", "-"], 0x564f2317bd38 /* 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=0, si_stime=0} ---
10    +++ exited with 0 +++