Given a binary array, find the index of `0`

to be replaced with `1`

to get the maximum length sequence of continuous `1`

s. Return that index.

Let array `arr`

equal to `[ 0, 0, 1, 0, 1, 1, 1, 0, 1, 1 ]`

. The index to be replaced is `7`

to get continuous sequence of length `6`

containing all `1`

s. Therefore the solution should return the integer `7`

.

Contributed by Murat Sütunç

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