3 ms·
also author of my favourite puzzle collection http://www.chiark.greenend.org.uk/~sgtatham/puzzles/ http://www.chiark.greenend.org.uk/~sgtatham/puzzles/
by gosub 11y ago
also author of my favourite puzzle collection http://www.chiark.greenend.org.uk/~sgtatham/puzzles/ http://www.chiark.greenend.org.uk/~sgtatham/puzzles/