python3, 53 bytes

Result

AC

Duration

639ms

Code [DL]

print("".join([str(0+c.isupper()) for c in input()]))

stdin

AbcDeFGHijkLMNOPQRSTUVWxyZ

stdout

10010111000111111111111001

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffd39c60de0 /* 7 vars */) = 0
12    execve("/usr/bin/python3", ["/usr/bin/python3", "/volume/CODE"], 0x5613b78add50 /* 7 vars */ <unfinished ...>
11    execve("/bin/cat", ["cat", "-"], 0x5613b78add38 /* 7 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 resumed>)             = 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} ---
10    +++ exited with 0 +++