python3, 52 bytes

Result

AC

Duration

549ms

Code [DL]

print(''.join([str(1-int(i>='a'))for i in input()]))

stdin

ABCdEFGHIJKLMNOpQRsTUVWXYZ

stdout

11101111111111101101111111

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffe01fb8c70 /* 7 vars */) = 0
12    execve("/usr/bin/python3", ["/usr/bin/python3", "/volume/CODE"], 0x55dbe536bd50 /* 7 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x55dbe536bd38 /* 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    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12, si_uid=0, si_status=0, si_utime=1, si_stime=0} ---
10    +++ exited with 0 +++