Try it on paper first. A hint, the key idea and the worked solution are here when you need them.
How many different numbers are there in ? Show them in order.
set(list) removes repeats.
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, compare your working with the solution.
set(numbers) drops the repeats and gives .
len(...) is .sorted(...) is [1, 2, 3].Log in to join the discussion.
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