golang, 104 bytes

Result

WA

Duration

1329ms

Code [DL]

package main
import."os"
func main(){b:=new([7]byte);for Stdin.Read(b){Stdout.Write(b[b[1]/=b[2]?4:1])}}

stdin

741 448
889 918
911 395
481 885
388 227
641 114
189 893
926 359
822 223
839 125
258 523
967 936
349 998
946 645
254 348
911 112
744 453
153 952
755 955
282 448
616 611
874 843
625 251
353 456
376 224
744 337
163 384
611 613
166 654
588 473
565 167
816 183

stdout

stderr

# command-line-arguments
/tmp/code.go:3:66: syntax error: unexpected /=, expecting :
/tmp/code.go:3:72: invalid character U+003F '?'
/root/script: line 7: /tmp/code: not found
rm: can't remove '/tmp/code': No such file or directory

strace

11    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffcc58dca30 /* 7 vars */) = 0
12    execve("/usr/bin/realpath", ["realpath", "/volume/CODE"], 0x562a56b9bd18 /* 7 vars */) = 0
12    +++ exited with 0 +++
11    --- 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("/bin/ln", ["ln", "-sf", "/volume/CODE", "/tmp/code.go"], 0x562a56b9bd38 /* 7 vars */) = 0
13    +++ exited with 0 +++
11    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
14    execve("/usr/bin/go", ["/usr/bin/go", "build", "-o", "/tmp/code", "/tmp/code.go"], 0x562a57c21028 /* 7 vars */) = 0
20    execve("/usr/lib/go/pkg/tool/linux_amd64/compile", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-V=full"], 0xc0003056c0 /* 25 vars */) = 0
21    execve("/usr/lib/go/pkg/tool/linux_amd64/compile", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-V=full"], 0xc000312dd0 /* 25 vars */) = 0
22    +++ exited with 0 +++
23    +++ exited with 0 +++
24    +++ exited with 0 +++
25    +++ exited with 0 +++
20    +++ exited with 0 +++
28    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=20, si_uid=0, si_status=0, si_utime=0, si_stime=1} ---
32    execve("/usr/lib/go/pkg/tool/linux_amd64/asm", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-V=full"], 0xc000313040 /* 25 vars */) = 0
27    +++ exited with 0 +++
31    +++ exited with 0 +++
29    +++ exited with 0 +++
30    +++ exited with 0 +++
21    +++ exited with 0 +++
16    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=21, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
33    execve("/usr/lib/go/pkg/tool/linux_amd64/asm", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-V=full"], 0xc000305860 /* 25 vars */) = 0
34    +++ exited with 0 +++
36    +++ exited with 0 +++
35    +++ exited with 0 +++
37    +++ exited with 0 +++
32    +++ exited with 0 +++
17    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=32, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
38    +++ exited with 0 +++
41    +++ exited with 0 +++
39    +++ exited with 0 +++
40    +++ exited with 0 +++
33    +++ exited with 0 +++
16    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=33, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
42    execve("/usr/lib/go/pkg/tool/linux_amd64/compile", ["/usr/lib/go/pkg/tool/linux_amd64"..., "-o", "/tmp/go-build905496477/b001/_pkg"..., "-trimpath", "/tmp/go-build905496477/b001=>", "-p", "main", "-complete", "-buildid", "Z8UDafjZ0psret6rvl-5/Z8UDafjZ0ps"..., "-goversion", "go1.13.10", "-D", "_/tmp", "-importcfg", "/tmp/go-build905496477/b001/impo"..., "-pack", "-c=2", "/tmp/code.go"], 0xc0001424e0 /* 25 vars */) = 0
44    +++ exited with 2 +++
46    +++ exited with 2 +++
45    +++ exited with 2 +++
43    +++ exited with 2 +++
42    +++ exited with 2 +++
17    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=42, si_uid=0, si_status=2, si_utime=0, si_stime=0} ---
28    +++ exited with 2 +++
26    +++ exited with 2 +++
19    +++ exited with 2 +++
18    +++ exited with 2 +++
16    +++ exited with 2 +++
15    +++ exited with 2 +++
17    +++ exited with 2 +++
14    +++ exited with 2 +++
11    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=14, si_uid=0, si_status=2, si_utime=3, si_stime=10} ---
47    execve("/bin/cat", ["cat", "-"], 0x562a56b9bd08 /* 7 vars */) = 0
48    execve("/tmp/code", ["/tmp/code"], 0x562a56b9bcf0 /* 7 vars */) = -1 ENOENT (No such file or directory)
48    +++ exited with 127 +++
11    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=48, si_uid=0, si_status=127, si_utime=0, si_stime=0} ---
47    --- SIGPIPE {si_signo=SIGPIPE, si_code=SI_USER, si_pid=47, si_uid=0} ---
47    +++ killed by SIGPIPE +++
11    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=47, si_uid=0, si_status=SIGPIPE, si_utime=0, si_stime=0} ---
49    execve("/bin/rm", ["rm", "/tmp/code.go", "/tmp/code"], 0x562a56b9bcf0 /* 7 vars */) = 0
49    +++ exited with 1 +++
11    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=49, si_uid=0, si_status=1, si_utime=0, si_stime=0} ---
11    +++ exited with 1 +++