reasonml, 145 bytes

Result

WA

Duration

938ms

Code [DL]

for(i in 0 to 31){
let a = Some(input_line(stdin));
if(a[1]==a[2]){
console.log(String.make(1,a[2]))
}else{
console.log(String.make(1,a[4]))
}
};

stdin

772 771
549 487
311 913
894 668
266 991
344 425
237 137
592 297
718 189
782 527
598 383
341 144
952 213
121 642
332 323
136 854
827 992
584 448
322 229
856 537
395 589
177 413
942 532
477 552
375 557
411 114
644 475
773 774
161 996
177 371
778 971
622 562

stdout

stderr

  We've found a bug for you!
  /tmp/code.re 3:4
  
  1 │ for(i in 0 to 31){
  2 │ let a = Some(input_line(stdin));
  3 │ if(a[1]==a[2]){
  4 │ console.log(String.make(1,a[2]))
  5 │ }else{
  
  This has type:
    option(string)
  But somewhere wanted:
    array('a)
  

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7fff7047ef20 /* 9 vars */) = 0
11    execve("/usr/bin/realpath", ["realpath", "/volume/CODE"], 0x55dc24bf1d18 /* 9 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.re"], 0x55dc24bf1d38 /* 9 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/bsc", ["/usr/bin/bsc", "/tmp/code.re"], 0x55dc24bf1d20 /* 9 vars */) = 0
13    execve("/bin/node", ["node", "/usr/bin/bsc", "/tmp/code.re"], 0x7ffc2fc758f0 /* 9 vars */) = -1 ENOENT (No such file or directory)
13    execve("/usr/local/sbin/node", ["node", "/usr/bin/bsc", "/tmp/code.re"], 0x7ffc2fc758f0 /* 9 vars */) = -1 ENOENT (No such file or directory)
13    execve("/usr/local/bin/node", ["node", "/usr/bin/bsc", "/tmp/code.re"], 0x7ffc2fc758f0 /* 9 vars */) = -1 ENOENT (No such file or directory)
13    execve("/usr/sbin/node", ["node", "/usr/bin/bsc", "/tmp/code.re"], 0x7ffc2fc758f0 /* 9 vars */) = -1 ENOENT (No such file or directory)
13    execve("/usr/bin/node", ["node", "/usr/bin/bsc", "/tmp/code.re"], 0x7ffc2fc758f0 /* 9 vars */) = 0
20    execve("/usr/lib/node_modules/bs-platform/linux/bsc.exe", ["/usr/lib/node_modules/bs-platfor"..., "/tmp/code.re"], 0x56280acf5a80 /* 9 vars */) = 0
21    execve("/bin/sh", ["sh", "-c", "/usr/lib/node_modules/bs-platfor"...], 0x7ffc777ae540 /* 9 vars */) = 0
21    execve("/usr/lib/node_modules/bs-platform/linux/refmt.exe", ["/usr/lib/node_modules/bs-platfor"..., "--print=binary", "/tmp/code.re"], 0x556f56279090 /* 9 vars */) = 0
21    +++ exited with 0 +++
20    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=21, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
20    +++ exited with 2 +++
13    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=20, si_uid=0, si_status=2, si_utime=0, si_stime=1} ---
18    +++ exited with 0 +++
15    +++ exited with 0 +++
16    +++ exited with 0 +++
14    +++ exited with 0 +++
17    +++ exited with 0 +++
19    +++ 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=0} ---
22    execve("/bin/cat", ["cat", "-"], 0x55dc24bf1d38 /* 9 vars */ <unfinished ...>
23    execve("/usr/bin/node", ["/usr/bin/node", "/tmp/code.js"], 0x55dc24bf1d48 /* 9 vars */) = 0
22    <... execve resumed>)             = 0
22    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=22, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
26    +++ exited with 0 +++
25    +++ exited with 0 +++
24    +++ exited with 0 +++
27    +++ exited with 0 +++
28    +++ exited with 0 +++
29    +++ exited with 0 +++
23    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=23, si_uid=0, si_status=0, si_utime=4, si_stime=1} ---
30    execve("/bin/rm", ["rm", "/tmp/code.js", "/tmp/code.re"], 0x55dc24bf1cf0 /* 9 vars */) = 0
30    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=30, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
10    +++ exited with 0 +++