Python

Return the sum of the numbers in the array, returning 0 for an empty array. Except the number 13 is very unlucky, so it does not count and numbers that come immediately after a 13 also do not count. sum13([1, 2, 2, 1]) ? 6 sum13([1, 1]) ? 2 sum13([1, 2, 2, 1, 13]) ? 6

Example:

def sum13(nums):

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Given an array length 1 or more of ints, return the difference between the largest and smallest values in the array. Note: the built-in min(v1, v2) and max(v1, v2) functions return the smaller or larger of two values.

big_diff([10, 3, 5, 6]) ? 7 big_diff([7, 2, 10, 9]) ? 8 big_diff([2, 10, 7, 2]) ? 8

Example:

def big_diff(nums):