CHALLENGE

ACTIVITY

$6\mathrm{.}4\mathrm{.}3$: Compute the distance between element positions.

$536736\mathrm{.}4090148$ qx$3$zqy$?7$

Compute the distance between the positions of the first and last zero element in the given array. For example, if the array is

$301049506$ your algorithm should yield $7-1=6.$

If the array contains a single zero, return $0.$ If it doesn't contain any zeroes, return a negative value.

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