powershell, 47 bytes

Result

AC

Duration

1722ms

Code [DL]

$input|%{if($_[1] -eq $_[2]){$_[2]}else{$_[4]}}

stdin

724 226
242 682
956 258
128 918
399 892
242 947
588 831
113 134
193 919
455 758
822 744
561 774
522 282
262 526
448 425
397 795
996 462
955 141
855 115
699 998
241 115
634 455
379 779
199 995
951 331
317 325
143 528
242 276
776 678
747 779
933 773
682 823

stdout

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

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7fff3c591310 /* 6 vars */) = 0
12    execve("/usr/bin/pwsh", ["/usr/bin/pwsh", "/volume/CODE"], 0x55898c126c28 /* 6 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x55898c126c10 /* 6 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} ---
15    +++ exited with 0 +++
16    +++ exited with 0 +++
12    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=15, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
31    +++ exited with 0 +++
32    +++ exited with 0 +++
30    +++ exited with 0 +++
29    +++ exited with 0 +++
28    +++ exited with 0 +++
27    +++ exited with 0 +++
26    +++ exited with 0 +++
24    +++ exited with 0 +++
25    +++ exited with 0 +++
23    +++ exited with 0 +++
22    +++ exited with 0 +++
21    +++ exited with 0 +++
20    +++ exited with 0 +++
19    +++ exited with 0 +++
17    +++ exited with 0 +++
18    +++ exited with 0 +++
14    +++ exited with 0 +++
13    +++ exited with 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=37, si_stime=16} ---
10    +++ exited with 0 +++