Language: C++

using System;
using System.Linq;

namespace ABC090_B
{
    class Program
    {
        static void Main(string[] args)
        {
            var aaa = Array.ConvertAll(Console.ReadLine().Split(' '),int.Parse);
            var A = aaa[0];
            var B = aaa[1];
            var count = 0;

            for(var i=A;i<=B;i++)
            {
                var s = i % 10;
                var t = i / 10000;
                var u = i % 10000 / 1000;
                var v = i %100 / 10;

                if (s == t && u == v)
                    count++;
            }
            Console.WriteLine(count);
        }
    }
}


Compiler output:
a.cc:1:7: error: expected nested-name-specifier before 'System'
    1 | using System;
      |       ^~~~~~
a.cc:2:7: error: expected nested-name-specifier before 'System'
    2 | using System.Linq;
      |       ^~~~~~
a.cc:8:26: error: 'string' has not been declared
    8 |         static void Main(string[] args)
      |                          ^~~~~~
a.cc:8:35: error: expected ',' or '...' before 'args'
    8 |         static void Main(string[] args)
      |                                   ^~~~
a.cc:27:6: error: expected ';' after class definition
   27 |     }
      |      ^
      |      ;
a.cc: In static member function 'static void ABC090_B::Program::Main(int*)':
a.cc:10:13: error: 'var' was not declared in this scope
   10 |             var aaa = Array.ConvertAll(Console.ReadLine().Split(' '),int.Parse);
      |             ^~~
a.cc:11:17: error: expected ';' before 'A'
   11 |             var A = aaa[0];
      |                 ^
a.cc:12:17: error: expected ';' before 'B'
   12 |             var B = aaa[1];
      |                 ^
a.cc:13:17: error: expected ';' before 'count'
   13 |             var count = 0;
      |                 ^~~~~
a.cc:15:21: error: expected ';' before 'i'
   15 |             for(var i=A;i<=B;i++)
      |                     ^
a.cc:15:25: error: 'i' was not declared in this scope
   15 |             for(var i=A;i<=B;i++)
      |                         ^
a.cc:15:28: error: 'B' was not declared in this scope
   15 |             for(var i=A;i<=B;i++)
      |                            ^
a.cc:17:21: error: expected ';' before 's'
   17 |                 var s = i % 10;
      |                     ^
a.cc:18:21: error: expected ';' before 't'
   18 |                 var t = i / 10000;
      |                     ^
a.cc:19:21: error: expected ';' before 'u'
   19 |                 var u = i % 10000 / 1000;
      |                     ^
a.cc:20:21: error: expected ';' before 'v'
   20 |                 var v = i %100 / 10;
      |                     ^
a.cc:22:21: error: 's' was not declared in this scope
   22 |                 if (s == t && u == v)
      |                     ^
a.cc:22:26: error: 't' was not declared in this scope
   22 |                 if (s == t && u == v)
      |                          ^
a.cc:22:31: error: 'u' was not declared in this scope
   22 |                 if (s == t && u == v)
      |                               ^
a.cc:22:36: error: 'v' was not declared in this scope
   22 |                 if (s == t && u == v)
      |                                    ^
a.cc:23:21: error: 'count' was not declared in this scope
   23 |                     count++;
      |                     ^~~~~
a.cc:25:13: error: 'Console' was not declared in this scope
   25 |             Console.WriteLine(count);
      |             ^~~~~~~
a.cc:25:31: error: 'count' was not declared in this scope
   25 |             Console.WriteLine(count);
      |                               ^~~~~