Practice · 3 of 4

Write the discriminating test

CHALLENGE

Difficulty: beginner+25 XP

Implement static int FirstDistinct(int[] nums) — the first element that differs from all previous ones (nums[0] never qualifies); -1 when none. Then the graded part: your own test group must include a case distinguishing "first distinct" from "any distinct" and a case for the all-equal array.

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