Language: C++

using System;

namespace AtBC176
{
    class Program
    {
        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());
            string[] str = Console.ReadLine().Split();
            int d = 0;
           
            int[] A = new int[N];
            int[] B = new int[N];

            for (int i = 0;i < N; i++)
            {
                A[i] = int.Parse(str[i]);
                B[i] = int.Parse(str[i]);
        
            }
            for (int ii = 0;ii < N - 1; ii++)
            {
                
                if (A[ii] > A[ii + 1])
                {
                    d += A[ii] 
                   d -= A[ii + 1];
                    A[ii + 1] = A[ii];                   
                }
              else {}
            }
           
            Console.WriteLine(d);
        }
    }
}


Compiler output:
a.cc:1:7: error: expected nested-name-specifier before 'System'
    1 | using System;
      |       ^~~~~~
a.cc:7:26: error: 'string' has not been declared
    7 |         static void Main(string[] args)
      |                          ^~~~~~
a.cc:7:35: error: expected ',' or '...' before 'args'
    7 |         static void Main(string[] args)
      |                                   ^~~~
a.cc:36:6: error: expected ';' after class definition
   36 |     }
      |      ^
      |      ;
a.cc: In static member function 'static void AtBC176::Program::Main(int*)':
a.cc:9:21: error: expected primary-expression before 'int'
    9 |             int N = int.Parse(Console.ReadLine());
      |                     ^~~
a.cc:10:13: error: 'string' was not declared in this scope
   10 |             string[] str = Console.ReadLine().Split();
      |             ^~~~~~
a.cc:10:20: error: expected primary-expression before ']' token
   10 |             string[] str = Console.ReadLine().Split();
      |                    ^
a.cc:13:16: error: structured binding declaration cannot have type 'int'
   13 |             int[] A = new int[N];
      |                ^~
a.cc:13:16: note: type must be cv-qualified 'auto' or reference to cv-qualified 'auto'
a.cc:13:16: error: empty structured binding declaration
a.cc:13:19: error: expected initializer before 'A'
   13 |             int[] A = new int[N];
      |                   ^
a.cc:14:16: error: structured binding declaration cannot have type 'int'
   14 |             int[] B = new int[N];
      |                ^~
a.cc:14:16: note: type must be cv-qualified 'auto' or reference to cv-qualified 'auto'
a.cc:14:16: error: empty structured binding declaration
a.cc:14:19: error: expected initializer before 'B'
   14 |             int[] B = new int[N];
      |                   ^
a.cc:18:17: error: 'A' was not declared in this scope
   18 |                 A[i] = int.Parse(str[i]);
      |                 ^
a.cc:18:24: error: expected primary-expression before 'int'
   18 |                 A[i] = int.Parse(str[i]);
      |                        ^~~
a.cc:19:17: error: 'B' was not declared in this scope
   19 |                 B[i] = int.Parse(str[i]);
      |                 ^
a.cc:19:24: error: expected primary-expression before 'int'
   19 |                 B[i] = int.Parse(str[i]);
      |                        ^~~
a.cc:25:21: error: 'A' was not declared in this scope
   25 |                 if (A[ii] > A[ii + 1])
      |                     ^
a.cc:34:13: error: 'Console' was not declared in this scope
   34 |             Console.WriteLine(d);
      |             ^~~~~~~