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wynk wrote:My solution in ruby:

Code: Select all

input = ["9f", "c7"]
input.map! {
	|x| x.to_i(16)
}
output = input.first ^ input.last
puts output.chr

Python is faster:

my way:

wget png
convert png bmp
cat bmp

Had the same problem, paintbrush gave wrong values. Tip: Use GIMP I am using Ubuntu / Gnome-shell and took GIMP's Pipette tool. It gave me slightly wrong colors :( The same problem when using the clipboard :( [copy graphics from firefox and apste into GIMP) Third attempt: Saving the original file a...