Remove Duplicates
Given a sorted list of numbers, remove duplicates and return the new length. You must do this in-place and without using extra memory.
Input: [0, 0, 1, 1, 1, 2, 2].
Output: 3.
Your function should modify the list in place so the first 3 elements becomes 0, 1, 2. Return 3 because the new length is 3.
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1 >>> a = [1, 2, 3] 2 >>> a[-1] 3 3
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