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Lasamatvs.GianniBartuccio

Find the Unique

1 Million entries is not that large so we can still solve it naively.

Code
Diff
  • module ExampleSolution

let findUniqueNumber arr =
    arr
    |> Seq.countBy id
    |> Seq.find (fun (_, count) -> count = 1)
    |> fst
    • module ExampleSolution
    • let findUniqueNumber array =
    • () // your code goes here
    • let findUniqueNumber arr =
    • arr
    • |> Seq.countBy id
    • |> Seq.find (fun (_, count) -> count = 1)
    • |> fst
Lasamatvs.rowcased

Refactor the Existing Code for Better Performance and Readability

Code
Diff
  • using System.Linq;
public class Program
{
  public static int FindSquaresInArray(int[] arr) => arr.Sum(x => x*x);
}
    • using System.Linq;
    • public class Program
    • {
    • public static int FindSquaresInArray(int[] arr)
    • {
    • int sum = 0;
    • foreach(int n in arr)
    • {
    • sum += n * n;
    • }
    • return sum;
    • }
    • public static int FindSquaresInArray(int[] arr) => arr.Sum(x => x*x);
    • }