using System;

public class Program

{

     public static (int strartIndex, int endIndex) StrictlyIncreasing(decimal[] sourceData)

        {

            int startIndex = 0;

            int endIndex = 0;

            int tempStartIndex = 0;

            int tempEndIndex = 0;

​

            for (int i = 1; i < sourceData.Length; i++)

            {

                // if (sourceData[i] > sourceData[i - 1]) 

                if (sourceData[i] >= sourceData[i - 1])  //<---這行寫錯

                {

                    tempEndIndex = i;

                }

​

                if (sourceData[i] <= sourceData[i - 1])

                {

                    if ((tempEndIndex - tempStartIndex) > (endIndex - startIndex))

                    {

                        startIndex = tempStartIndex;

                        endIndex = tempEndIndex;

                    }

                    tempStartIndex = i;

                }

            }

            if ((tempEndIndex - tempStartIndex) > (endIndex - startIndex))

            {

                startIndex = tempStartIndex;

                endIndex = tempEndIndex;

            }

​

            return (startIndex, endIndex);

        }

    public static void printResult(decimal[] input){

        var result= StrictlyIncreasing(input);

        Console.WriteLine(result);

    }

    public static void Main()

    {

        printResult(new decimal[]{ 0, 1,2,3,4,5}); //全包 預期答案 (0, 5)

        printResult(new decimal[]{ 0, 1,2,3,4,4}); //包頭 預期答案 (0, 4)

        printResult(new decimal[]{ 1, 1,2,3,4,5}); //包尾 預期答案 (1, 5)

        printResult(new decimal[]{ 1, 1,2,3,4,4}); //都沒 預期答案 (1, 4)

        printResult(new decimal[]{ 1}); //單筆 預期答案 (0, 0)

        printResult(new decimal[]{ });  //沒半筆 預期答案 (0, 0) <---這其實看定義

    }

}