c-gcc, 56 bytes

Result

AC

Duration

942ms

Code [DL]

i,j;main(){for(;gets(&j);)putchar(j/256%257-32?i:j>>8);}

stdin

186 684
129 223
142 218
948 487
144 487
142 441
494 941
424 782
994 146
787 484
713 313
616 667
484 628
456 729
968 553
499 991
955 654
323 386
851 577
635 756
265 554
822 228
233 533
732 811
423 668
712 166
244 456
766 957
322 112
988 646
773 878
377 442

stdout

62244497143667595357523861462887

stderr

/tmp/code.c:1:1: warning: data definition has no type or storage class
    1 | i,j;main(){for(;gets(&j);)putchar(j/256%257-32?i:j>>8);}
      | ^
/tmp/code.c:1:1: warning: type defaults to 'int' in declaration of 'i' [-Wimplicit-int]
/tmp/code.c:1:3: warning: type defaults to 'int' in declaration of 'j' [-Wimplicit-int]
    1 | i,j;main(){for(;gets(&j);)putchar(j/256%257-32?i:j>>8);}
      |   ^
/tmp/code.c:1:5: warning: return type defaults to 'int' [-Wimplicit-int]
    1 | i,j;main(){for(;gets(&j);)putchar(j/256%257-32?i:j>>8);}
      |     ^~~~
/tmp/code.c: In function 'main':
/tmp/code.c:1:17: warning: implicit declaration of function 'gets' [-Wimplicit-function-declaration]
    1 | i,j;main(){for(;gets(&j);)putchar(j/256%257-32?i:j>>8);}
      |                 ^~~~
/tmp/code.c:1:27: warning: implicit declaration of function 'putchar' [-Wimplicit-function-declaration]
    1 | i,j;main(){for(;gets(&j);)putchar(j/256%257-32?i:j>>8);}
      |                           ^~~~~~~

strace

11    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE.c"], 0x7ffeefa45850 /* 7 vars */) = 0
12    execve("/usr/bin/realpath", ["realpath", "/volume/CODE.c"], 0x55b793d06d20 /* 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.c", "/tmp/code.c"], 0x55b793d06d40 /* 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/gcc", ["gcc", "-Wall", "-O2", "-std=c99", "/tmp/code.c", "-o", "/tmp/code", "-lm"], 0x55b7959a00d8 /* 7 vars */) = 0
15    execve("/usr/libexec/gcc/x86_64-alpine-linux-musl/9.3.0/cc1", ["/usr/libexec/gcc/x86_64-alpine-l"..., "-quiet", "/tmp/code.c", "-quiet", "-dumpbase", "code.c", "-mtune=generic", "-march=x86-64", "-auxbase", "code", "-O2", "-Wall", "-std=c99", "-o", "/tmp/ccABbCnF.s"], 0x202c020 /* 10 vars */) = 0
15    +++ exited with 0 +++
14    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=15, si_uid=0, si_status=0, si_utime=1, si_stime=1} ---
16    execve("/usr/lib/gcc/x86_64-alpine-linux-musl/9.3.0/../../../../x86_64-alpine-linux-musl/bin/as", ["/usr/lib/gcc/x86_64-alpine-linux"..., "--64", "-o", "/tmp/ccnnilKb.o", "/tmp/ccABbCnF.s"], 0x202c020 /* 10 vars */) = 0
16    +++ exited with 0 +++
14    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=16, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
17    execve("/usr/libexec/gcc/x86_64-alpine-linux-musl/9.3.0/collect2", ["/usr/libexec/gcc/x86_64-alpine-l"..., "-plugin", "/usr/libexec/gcc/x86_64-alpine-l"..., "-plugin-opt=/usr/libexec/gcc/x86"..., "-plugin-opt=-fresolution=/tmp/cc"..., "-plugin-opt=-pass-through=-lgcc", "-plugin-opt=-pass-through=-lgcc_"..., "-plugin-opt=-pass-through=-lc", "-plugin-opt=-pass-through=-lgcc", "-plugin-opt=-pass-through=-lgcc_"..., "--eh-frame-hdr", "--hash-style=gnu", "-m", "elf_x86_64", "--as-needed", "-dynamic-linker", "/lib/ld-musl-x86_64.so.1", "-pie", "-z", "relro", "-z", "now", "-o", "/tmp/code", "/usr/lib/gcc/x86_64-alpine-linux"..., "/usr/lib/gcc/x86_64-alpine-linux"..., "/usr/lib/gcc/x86_64-alpine-linux"..., "-L/usr/lib/gcc/x86_64-alpine-lin"..., "-L/usr/lib/gcc/x86_64-alpine-lin"..., "-L/usr/lib/gcc/x86_64-alpine-lin"..., "-L/lib/../lib", "-L/usr/lib/../lib", ...], 0x202c020 /* 12 vars */) = 0
18    execve("/usr/lib/gcc/x86_64-alpine-linux-musl/9.3.0/../../../../x86_64-alpine-linux-musl/bin/ld", ["/usr/lib/gcc/x86_64-alpine-linux"..., "-plugin", "/usr/libexec/gcc/x86_64-alpine-l"..., "-plugin-opt=/usr/libexec/gcc/x86"..., "-plugin-opt=-fresolution=/tmp/cc"..., "-plugin-opt=-pass-through=-lgcc", "-plugin-opt=-pass-through=-lgcc_"..., "-plugin-opt=-pass-through=-lc", "-plugin-opt=-pass-through=-lgcc", "-plugin-opt=-pass-through=-lgcc_"..., "--eh-frame-hdr", "--hash-style=gnu", "-m", "elf_x86_64", "--as-needed", "-dynamic-linker", "/lib/ld-musl-x86_64.so.1", "-pie", "-z", "relro", "-z", "now", "-o", "/tmp/code", "/usr/lib/gcc/x86_64-alpine-linux"..., "/usr/lib/gcc/x86_64-alpine-linux"..., "/usr/lib/gcc/x86_64-alpine-linux"..., "-L/usr/lib/gcc/x86_64-alpine-lin"..., "-L/usr/lib/gcc/x86_64-alpine-lin"..., "-L/usr/lib/gcc/x86_64-alpine-lin"..., "-L/lib/../lib", "-L/usr/lib/../lib", ...], 0x7fff07e52a00 /* 12 vars */) = 0
18    +++ exited with 0 +++
17    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=18, si_uid=0, si_status=0, si_utime=1, si_stime=1} ---
17    +++ exited with 0 +++
14    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=17, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
14    +++ exited with 0 +++
11    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=14, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
19    execve("/bin/cat", ["cat", "-"], 0x55b793d06d08 /* 7 vars */) = 0
20    execve("/tmp/code", ["/tmp/code"], 0x55b793d06cf0 /* 7 vars */) = 0
19    +++ exited with 0 +++
11    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
20    +++ exited with 0 +++
11    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=20, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
21    execve("/bin/rm", ["rm", "/tmp/code.c", "/tmp/code"], 0x55b793d06cf0 /* 7 vars */) = 0
21    +++ exited with 0 +++
11    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=21, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
11    +++ exited with 0 +++