jq, 23 bytes

Result

WA

Duration

832ms

Code [DL]

.[index(.[2:3])*2:][:1]

stdin

411 124
189 891
272 285
383 871
322 226
345 542
841 447
295 118
658 559
682 264
275 471
966 266
498 986
228 181
922 112
675 971
193 331
165 859
744 673
818 816
911 682
677 775
153 986
751 115
154 597
977 229
769 212
122 299
784 125
121 553
478 752
955 959

stdout

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

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7fff6dfcad90 /* 7 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x5648b7a87cf8 /* 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/jq", ["/usr/bin/jq", "-rR", "-f", "/volume/CODE"], 0x5648b89fc430 /* 7 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=2, si_stime=0} ---
10    +++ exited with 0 +++