Solver and Testcases for AsciiArcLength

AsciiArcLength.cs

using System;

class Program
{
    static void Main(string[] args)
    {
        if (args[0] == "gen")
            GenerateRandom();
        else if (args[0] == "len")
            Console.WriteLine(Measure().ToString("0.00"));
    }

    static void GenerateRandom()
    {
        Random rnd = new Random();

        int len = rnd.Next(2, 101); // [2, 100]

        string blank = new string(' ', 10);
        char[] ls = blank.ToCharArray();
        int ln = -1;

        for (int i = 0; i < len; i++)
        {
            char[] s = blank.ToCharArray();
            
            int n = rnd.Next(0, 10); // [0, 9]

            s[n] = '#';

            for (int j = n;  ln != -1 && j != ln && ls[j] == ' '; j += Math.Sign(ln - n))
            {
                s[j] = '#';
            }

            ln = n;
            ls = s;

            Console.WriteLine(s);
        }
    }

    static double Measure()
    {
        string[] lines = Console.In.ReadToEnd().Split('\n');

        string ls = lines[0];
        int ln = lines[0].IndexOf('#');
        double acc = 0;

        for (int i = 1; i < lines.Length; i++)
        {
            string s = lines[i];

            if (string.IsNullOrEmpty(s))
                break;

            int n = -1;

            for (int j = 0; j < 10; j++)
            {
                if (s[j] == '#')
                {
                    if (n < 0 || j > ln)
                        n = j;
                }
            }

            int d = ln - n;
            acc += Math.Round(Math.Sqrt(d * d + 1), 2);

            ls = s;
            ln = n;
        }

        return Math.Round(acc, 2);
    }
}

LargeTestCase1.txt

Expected Output: 143.53

  #       
   ##     
    #     
####      
    ######
     #    
     #    
 ####     
#         
#         
 ######   
       #  
        ##
  ######  
 #        
  #####   
  #       
   ###### 
###       
  #       
   ###    
 ##       
 #        
  ####### 
##        
#         
 ######   
    #     
####      
    ##### 
  ##      
 #        
 #        
  ######  
##        
  ####