golfscript, 15 bytes

Result

WA

Duration

1017ms

Code [DL]

8/{..2=?2*=}%n+

stdin

766 193
897 744
922 288
771 798
688 887
878 982
977 873
399 446
942 116
752 522
883 493
422 228
146 447
342 922
459 997
294 491
377 873
537 371
958 445
478 885
756 627
211 687
488 118
575 573
717 116
599 644
845 247
191 921
167 747
522 232
363 763
963 982

stdout

67278879154249947348618579217239

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7fff764da3c0 /* 9 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x563d3b04ad70 /* 9 vars */) = 0
12    execve("/usr/local/ruby-2.7.1/bin/ruby", ["/usr/local/ruby-2.7.1/bin/ruby", "/root/golfscript.rb", "/volume/CODE"], 0x563d3b9bf028 /* 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    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12, si_uid=0, si_status=0, si_utime=8, si_stime=2} ---
10    +++ exited with 0 +++