golang, 128 bytes

Result

WA

Duration

1359ms

Code [DL]

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

stdin

319 415
125 825
225 522
943 428
916 563
688 585
144 926
725 576
795 881
863 636
965 663
144 997
318 992
494 492
765 553
276 729
181 117
471 778
377 274
238 439
256 962
644 441
665 653
477 538
233 331
244 484
864 381
515 587
335 717
544 451
633 887
838 918

stdout

stderr

# command-line-arguments
/tmp/code.go:3:78: invalid operation: s[1] + t (mismatched types byte and string)
/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"], 0x7ffe2c11f0a0 /* 7 vars */) = 0
11    execve("/usr/bin/realpath", ["realpath", "/volume/CODE"], 0x56405f863d18 /* 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"], 0x56405f863d38 /* 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"], 0x56406143e028 /* 7 vars */) = 0
20    execve("/usr/lib/go/pkg/tool/linux_amd64/compile", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-V=full"], 0xc0001301a0 /* 25 vars */) = 0
21    execve("/usr/lib/go/pkg/tool/linux_amd64/compile", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-V=full"], 0xc00012dad0 /* 25 vars */) = 0
23    ????( <unfinished ...>
25    +++ exited with 0 +++
24    +++ exited with 0 +++
23    +++ exited with 0 +++
20    +++ exited with 0 +++
18    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=20, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
26    execve("/usr/lib/go/pkg/tool/linux_amd64/asm", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-V=full"], 0xc000130340 /* 25 vars */) = 0
29    +++ exited with 0 +++
28    +++ exited with 0 +++
27    +++ exited with 0 +++
30    +++ exited with 0 +++
21    +++ exited with 0 +++
18    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=21, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
33    +++ exited with 0 +++
34    +++ exited with 0 +++
35    +++ exited with 0 +++
32    +++ exited with 0 +++
26    +++ exited with 0 +++
18    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=26, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
31    execve("/usr/lib/go/pkg/tool/linux_amd64/asm", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-V=full"], 0xc00012dd40 /* 25 vars */) = 0
37    +++ exited with 0 +++
36    +++ exited with 0 +++
38    +++ exited with 0 +++
31    +++ exited with 0 +++
15    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=31, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
39    execve("/usr/lib/go/pkg/tool/linux_amd64/compile", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-o", "/tmp/go-build927957948/b001/_pkg"..., "-trimpath", "/tmp/go-build927957948/b001=>", "-p", "main", "-complete", "-buildid", "blMigI8Wl8ByxNVdFvwI/blMigI8Wl8B"..., "-goversion", "go1.13.10", "-D", "_/tmp", "-importcfg", "/tmp/go-build927957948/b001/impo"..., "-pack", "-c=2", "/tmp/code.go"], 0xc0003b0410 /* 25 vars */) = 0
42    +++ exited with 2 +++
41    +++ exited with 2 +++
40    +++ exited with 2 +++
43    +++ exited with 2 +++
39    +++ exited with 2 +++
13    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=39, si_uid=0, si_status=2, si_utime=0, si_stime=1} ---
22    +++ exited with 2 +++
19    +++ exited with 2 +++
18    +++ exited with 2 +++
17    +++ exited with 2 +++
16    +++ exited with 2 +++
15    +++ exited with 2 +++
14    +++ 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=4, si_stime=12} ---
44    execve("/bin/cat", ["cat", "-"], 0x56405f863d08 /* 7 vars */) = 0
45    execve("/tmp/code", ["/tmp/code"], 0x56405f863cf0 /* 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"], 0x56405f863cf0 /* 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 +++