Simple format string bug. I tried to extract the flag using `%n$x` where n is just positive integers. And decode using [cyberchef](https://gchq.github.io/CyberChef/#recipe=Swap_endianness('Hex',4,true)From_Hex('Auto')Remove_null_bytes()&input=ZjdmNDQ1ODBmN2Y0NDAwMGY3ZjY1MmQwMjQzNjI1MDBmNzAwMGE3OGY3ZjQ0M2ZjNjE2YzY2MDM2MTYzN2I2NzY3NWY3Mzc0NjU2ZDVmNmY3ZDc3NmY).


At the 14th element, the flag was done.


Flag: `flag{cats_go_meow}`