golang, 122 bytes

Result

WA

Duration

1352ms

Code [DL]

package main
import."fmt"
func main(){var s,t string;i=0;for i<32{Scan(&s, &t);if s[1]==s[2]{t=s[1:]};Print(t[0]-48);i++}}

stdin

298 246
477 545
575 467
631 319
735 373
598 873
911 653
631 613
536 355
733 332
661 149
977 479
264 442
211 223
641 449
755 852
874 545
336 578
738 752
488 334
533 336
527 729
142 421
664 667
478 113
837 134
871 575
299 961
779 998
916 611
811 177
991 774

stdout

stderr

# command-line-arguments
/tmp/code.go:3:28: undefined: i
/root/script: line 7: /tmp/code: not found
rm: can't remove '/tmp/code': No such file or directory

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffd059f39e0 /* 7 vars */) = 0
11    execve("/usr/bin/realpath", ["realpath", "/volume/CODE"], 0x562e9ddf2d18 /* 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    execve("/bin/ln", ["ln", "-sf", "/volume/CODE", "/tmp/code.go"], 0x562e9ddf2d38 /* 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    execve("/usr/bin/go", ["/usr/bin/go", "build", "-o", "/tmp/code", "/tmp/code.go"], 0x562e9f203028 /* 7 vars */) = 0
20    execve("/usr/lib/go/pkg/tool/linux_amd64/compile", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-V=full"], 0xc0001560d0 /* 25 vars */) = 0
21    execve("/usr/lib/go/pkg/tool/linux_amd64/compile", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-V=full"], 0xc000421930 /* 25 vars */) = 0
25    +++ exited with 0 +++
23    +++ exited with 0 +++
24    +++ exited with 0 +++
22    +++ exited with 0 +++
20    +++ exited with 0 +++
14    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=20, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
29    +++ exited with 0 +++
30    +++ exited with 0 +++
31    +++ exited with 0 +++
28    +++ exited with 0 +++
21    +++ exited with 0 +++
26    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=21, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
27    execve("/usr/lib/go/pkg/tool/linux_amd64/asm", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-V=full"], 0xc000156340 /* 25 vars */) = 0
32    execve("/usr/lib/go/pkg/tool/linux_amd64/asm", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-V=full"], 0xc0001564e0 /* 25 vars */) = 0
33    ????( <unfinished ...>
33    +++ exited with 0 +++
34    +++ exited with 0 +++
35    +++ exited with 0 +++
36    +++ exited with 0 +++
27    +++ exited with 0 +++
19    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=27, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
37    +++ exited with 0 +++
38    +++ exited with 0 +++
39    +++ exited with 0 +++
32    +++ exited with 0 +++
19    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=32, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
40    execve("/usr/lib/go/pkg/tool/linux_amd64/compile", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-o", "/tmp/go-build118073607/b001/_pkg"..., "-trimpath", "/tmp/go-build118073607/b001=>", "-p", "main", "-complete", "-buildid", "q4O9vCwz9qjKF6AwywzW/q4O9vCwz9qj"..., "-goversion", "go1.13.10", "-D", "_/tmp", "-importcfg", "/tmp/go-build118073607/b001/impo"..., "-pack", "-c=2", "/tmp/code.go"], 0xc000478410 /* 25 vars */) = 0
41    +++ exited with 2 +++
43    +++ exited with 2 +++
42    +++ exited with 2 +++
40    +++ exited with 2 +++
15    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=40, si_uid=0, si_status=2, si_utime=0, si_stime=0} ---
26    +++ exited with 2 +++
19    +++ exited with 2 +++
18    +++ exited with 2 +++
17    +++ exited with 2 +++
15    +++ exited with 2 +++
14    +++ exited with 2 +++
16    +++ exited with 2 +++
13    +++ exited with 2 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13, si_uid=0, si_status=2, si_utime=3, si_stime=12} ---
44    execve("/bin/cat", ["cat", "-"], 0x562e9ddf2d08 /* 7 vars */) = 0
45    execve("/tmp/code", ["/tmp/code"], 0x562e9ddf2cf0 /* 7 vars */) = -1 ENOENT (No such file or directory)
45    +++ exited with 127 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=45, si_uid=0, si_status=127, si_utime=0, si_stime=0} ---
44    --- SIGPIPE {si_signo=SIGPIPE, si_code=SI_USER, si_pid=44, si_uid=0} ---
44    +++ killed by SIGPIPE +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=44, si_uid=0, si_status=SIGPIPE, si_utime=0, si_stime=0} ---
46    execve("/bin/rm", ["rm", "/tmp/code.go", "/tmp/code"], 0x562e9ddf2cf0 /* 7 vars */) = 0
46    +++ exited with 1 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=46, si_uid=0, si_status=1, si_utime=0, si_stime=0} ---
10    +++ exited with 1 +++