[프로그래머스]Lv.0 2의 영역 3 C#

https://school.programmers.co.kr/learn/courses/30/lessons/181894?language=csharp 

프로그래머스

소스코드

using System;

public class Solution
{
    public int[] solution(int[] arr)
    {
        int start = Array.IndexOf(arr, 2);

        if (start == -1) return new int[] { -1 };

        int end = Array.LastIndexOf(arr, 2);

        int[] answor = new int[end - start + 1];

        Array.Copy(arr, start, answor, 0, answor.Length);

        return answor;
    }
}