arithmetic, 226 bytes

Result

AC

Duration

875ms

Code [DL]

2=2
2+1=3
2+3=5
5+2=7
1=1
1=1+0
2=1+1
10=10
84=84
19=19
75=75
26=26
3=6/2
3*10=25+5
4+4=8
17=17
2=2
17/0
8+0=8
8+12=18+2
3+0=3
1/0
3+84=85+2
8+4=12
10/0
3+75=71+7
3=1*3
6-5=1
8+0=8
3=1*3
8+12=19+1
1/0
2=2
2=2
2=2
3=1*3
0=26-26

stdin

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      K                                           

stdout

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      KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffeaa8d2f10 /* 9 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x564b1b403068 /* 9 vars */ <unfinished ...>
12    execve("/usr/local/ruby-2.6.3/bin/ruby", ["/usr/local/ruby-2.6.3/bin/ruby", "/root/Arithmetic/eso.rb", "/volume/CODE"], 0x564b1b403090 /* 9 vars */ <unfinished ...>
11    <... execve resumed> )            = 0
12    <... execve resumed> )            = 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=11, si_stime=2} ---
10    +++ exited with 0 +++