Здравейте, колеги:)

От известно време се боря с масиви и конкретно с тази задача. Проблемът ми е , че решението ми работи(

using System;
using System.Linq;	

public class Program
{
	public static void Main()
	{
	long[] numbers=Console.ReadLine().Split().Select(long.Parse).ToArray();
		
		string input=null;
		
		while((input=Console.ReadLine())!="End")
		
		{
		
			string[] command=input.Split().ToArray();
			
			long index=0;
			long sumNegative=0;
			long sumPositive=0;
			long sumAll=0;
			switch (command[0])
			
			{
			
					case"Switch":
					
					index=long.Parse(command[1]);
					
					if(index<0||index>=numbers.Length)
					
					{
					continue;
					}
					numbers[index]=numbers[index]*-1L;
					break;
			
					case"Change":
					index=long.Parse(command[1]);
					
					if(index<0||index>=numbers.Length)
					
					{
					continue;
					}
					
					long numValue=long.Parse(command[2]);
					numbers[index]=numValue;
					
					
					break;
					
					case"Sum":
					
					string commandSum=command[1];
					
					if(commandSum=="Negative")
					{
					for(int i=0;i<numbers.Length;i++)
					
					{
						if(numbers[i]<0)
						
						{
						sumNegative+=numbers[i];
						}
					
					
					}
						
						Console.WriteLine(sumNegative);
					
					}
					
					else if(commandSum=="Positive")
					{
					for(int i=0;i<numbers.Length;i++)
					
					{
						if(numbers[i]>=0)
						
						{
						sumPositive+=numbers[i];
						}
					
					
					}
						
						Console.WriteLine(sumPositive);
					
					}
					
						else if(commandSum=="All")
					{
					for(int i=0;i<numbers.Length;i++)
					
					{
						sumAll+=numbers[i];
					
					
					}
						
						Console.WriteLine(sumAll);
					
					}
					break;
			}
		
			
			
		}
		
		foreach(int number in numbers)
		
		{
		if(number>=0)
		
		{
	
		Console.Write(number+" ");
		}
		
		}
		
		
		
	}
		
}
		
		
        

), но Джъдж не го приема и ми дава следната грешка:  

C:\Windows\TEMP\ExecutionStrategies\mqwjvphd.wn1\tmp6B78.tmp:79
    run: using System;
               ^^^^^^

SyntaxError: Unexpected identifier
    at Module._compile (internal/modules/cjs/loader.js:872:18)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:947:10)
    at Module.load (internal/modules/cjs/loader.js:790:32)
    at Function.Module._load (internal/modules/cjs/loader.js:703:12)
    at Function.Module.runMain (internal/modules/cjs/loader.js:999:10)
    at internal/main/run_main_module.js:17:11

Моля ви за помощ, защото наистина не мога да разбера какъв е проблемът!

Предварително благодаря!

Задачата е:

Create a program that helps you keep track of a number array. First, you are going to receive the numbers оn a single line, separated by space, in the following format:

"{number1} {number2} {number3}… {numbern}"

Then you will start receiving commands until you read the "End" message. There are five possible commands:

• "Switch {index}"
  • Find the number on this index in your collection, if the index exists, and switch its sign (negative <-> positive).  
• "Change {index} {value}"
  • Replace the number on the given index with the number given, if the index exists.
• "Sum Negative"
  • Print the sum of all negative numbers.
• "Sum Positive"
  • Print the sum of all positive numbers.
• "Sum All"
  • Print the sum of all numbers.

In the end, print the positive numbers on a single line, keeping in mind that 0 is positive, separated by a single space in the following format:

"{number1} {number2} {number3}… {numbern}"

Input

• On the 1st line you are going to receive the numbers of the array (always integers), separated by a single space.
• On the next lines, until the "End" command is received, you will be receiving commands.

Output

• Print the tasks in the format described above.

Поздрави.

Дени