golfscript, 30 bytes

Result

AC

Duration

882ms

Code [DL]

n%{.1=\.2=@={1=48-}{4=48-}if}%

stdin

421 184
753 354
398 529
563 334
588 729
725 236
743 443
769 812
945 557
998 891
166 687
152 556
266 993
367 275
243 943
633 167
648 451
518 283
116 166
932 661
282 211
611 819
955 538
166 665
933 994
784 845
188 787
855 553
924 774
367 844
859 158
597 388

stdout

13538248586562934216215638857813

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffe1e5a7390 /* 9 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x55bf4653cd70 /* 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"], 0x55bf4660f028 /* 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=5, si_stime=3} ---
10    +++ exited with 0 +++