Question: You are given an array consisting of n distinct sorted integers, followed by a sequence of repeated sentinel values ( e . g . ,

You are given an array consisting of n distinct sorted integers, followed by a sequence of repeated sentinel values (e.g., all zeros or any predefined constant). The array length is unknown, but the n distinct integers are guaranteed to exist before the sentinel values start.
Design an efficient algorithm to determine the number of valid integers in the array (before the sentinel values begin). Write recurrence equation also.

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