what exactly does the issue was in array ending mean?

It returns score: 100 in my IDE and in online compiler, also I've tried multiple attemps and it always returns wrong on random test.

Your code fails this test:

{
    const int dice[5] = {2, 6, 1, 6, 4};
    cr_assert_eq(score(dice), 100);
}

Try putting this in your IDE to see the result. Your code returns 700, whereas it should return 100

In random tests submited answer is incorrect, but when I copy test case to my IDE it works well. How to fix?

Added random tests to C#.

Make sure you use u64

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Approved

Your code must return true or false (not 'true' and 'false') depending upon whether the given number is a Narcissistic number in base 10.

Ohhh thx~

you're printing too much to console, just remove the print statements and it will pass

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