pseudo

I’ve reached the point in which I too see the similarities with another esoteric language with the bytes for all but 3 of the bytes. However, I’m mainly zooming on this one byte as I know this is the one where some checking occurs… I know what operations are performed on my input and know what happens when this check fails. However, I’m having some difficulty getting past this part as I am not sure about the length. Anyone can help me out a little?

On a sidenote (this might be my lack of experience with remote debugging with gdb), who else had issues finding what they typed in the memory of the program?