lua, 70 bytes

Result

AC

Duration

902ms

Code [DL]

::x::a,b=io.read("*n","*n")print(a%100%11==0 and a%10 or b//100)goto x

stdin

854 556
948 441
422 221
165 675
875 754
699 196
255 544
195 597
546 435
299 998
929 293
838 223
712 228
521 171
254 488
866 537
966 689
549 834
188 318
721 678
655 664
358 168
324 629
623 937
944 557
294 573
733 738
285 288
173 373
818 686
448 331
779 995

stdout

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

stderr

/usr/bin/lua5.3: /volume/CODE:1: attempt to perform arithmetic on a nil value (global 'a')
stack traceback:
	/volume/CODE:1: in main chunk
	[C]: in ?

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffee177ecd0 /* 7 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x55e24acaed30 /* 7 vars */ <unfinished ...>
12    execve("/usr/bin/lua5.3", ["/usr/bin/lua5.3", "/volume/CODE"], 0x55e24acaed40 /* 7 vars */ <unfinished ...>
11    <... execve resumed>)             = 0
12    <... 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 1 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12, si_uid=0, si_status=1, si_utime=0, si_stime=0} ---
10    +++ exited with 1 +++