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Find the missing element in a given permutation. in c#

Stupid Skipper answered on May 25, 2022 Popularity 3/10 Helpfulness 1/10

answer Find the missing element in a given permutation. in c#

Find the missing element in a given permutation. in c#

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public static int permMissingElement(int[] elements)
    {
        long n = elements.Length + 1;
        var sumOfAllElements = (n * (1 + n)) / 2;
        var missingElement = sumOfAllElements - elements.Select(x => (long)x).Sum();
        return (int)missingElement;
    }

Popularity 3/10 Helpfulness 1/10 Language csharp

Source: codereview.stackexchange.com

Tags: c# element find

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