awk, 19 bytes

Result

WA

Duration

847ms

Code [DL]

FS=A;$0=$2-$3?$5:$3

stdin

611 755
253 959
873 366
325 226
873 336
976 564
481 177
916 416
822 237
922 443
997 729
497 973
383 898
945 934
144 344
823 238
339 796
578 886
134 353
442 335
336 119
659 953
522 723
577 751
434 372
596 696
677 774
345 715
533 773
866 664
455 277
697 996

stdout

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

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffe7e6c3db0 /* 7 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x561e81121d58 /* 7 vars */) = 0
12    execve("/usr/bin/gawk", ["/usr/bin/gawk", "-f", "/volume/CODE"], 0x561e82384028 /* 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} ---
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 +++