Cumulative Views Reach Target Day

Given a daily-view array and a target, return the 0-indexed day on which the cumulative views first reach or exceed the target. If the target is never met, return `-1`. Requirements Input: integer array visits[] (visits on day i) and integer target. Return the smallest i such that sum(visits[0..i]) >= target. Use 0-indexed or 1-indexed per the prompt — clarify. If no such i exists, return -1. Notes One-pass running sum; bail out the moment the threshold is crossed. Off-by-one: the prompt uses 0-indexed days, and the answer is the first index whose running total is >= target. Confirm before coding. This is the easiest problem in the recent OA rotation; spending more than 5 minutes is a signal that something is misread. Preparation Implement in one line of running-sum logic; do not over-engineer to prefix-sum arrays. Add a sanity test: visits = [1, 2, 3, 4], target = 6 should return 2 (cumulative at index 2 is 6).