Language: C++

using System;
using System.Text;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using static System.Console;
using static System.Math;
using System.Text.RegularExpressions;

namespace Yuzuki
{
    class Yukari
    {
        public static void Main(string[] args)
        {
            string[] buf = Console.ReadLine().Split();
            int a = int.Parse(buf[0]);
            int b = int.Parse(buf[1]);
            int m = int.Parse(buf[2]);

            int[] As = new int[a];
            int[] Bs = new int[b];

            buf = Console.ReadLine().Split();
            for (int _ = 0; _ < a; _++)
            {
                As[_] = int.Parse(buf[_]);
            }
            buf = Console.ReadLine().Split();
            for (int _ = 0; _ < b; _++)
            {
                Bs[_] = int.Parse(buf[_]);
            }

            int ans = As.Min() + Bs.Min();

            for (int i = 0; i < m; i++)
            {
                buf = Console.ReadLine().Split();             
                int x = int.Parse(buf[0]);
                int y = int.Parse(buf[1]);
                int c = int.Parse(buf[2]);
                ans = Min(ans, As[x - 1] + Bs[y - 1] - c);
            }

            Console.WriteLine(ans);
        }
    }
}

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.Text;
      |       ^~~~~~
a.cc:3:7: error: expected nested-name-specifier before 'System'
    3 | using System.Linq;
      |       ^~~~~~
a.cc:4:7: error: expected nested-name-specifier before 'System'
    4 | using System.Collections;
      |       ^~~~~~
a.cc:5:7: error: expected nested-name-specifier before 'System'
    5 | using System.Collections.Generic;
      |       ^~~~~~
a.cc:6:7: error: expected nested-name-specifier before 'static'
    6 | using static System.Console;
      |       ^~~~~~
a.cc:7:7: error: expected nested-name-specifier before 'static'
    7 | using static System.Math;
      |       ^~~~~~
a.cc:8:7: error: expected nested-name-specifier before 'System'
    8 | using System.Text.RegularExpressions;
      |       ^~~~~~
a.cc:14:15: error: expected ':' before 'static'
   14 |         public static void Main(string[] args)
      |               ^~~~~~~
      |               :
a.cc:14:33: error: 'string' has not been declared
   14 |         public static void Main(string[] args)
      |                                 ^~~~~~
a.cc:14:42: error: expected ',' or '...' before 'args'
   14 |         public static void Main(string[] args)
      |                                          ^~~~
a.cc:48:6: error: expected ';' after class definition
   48 |     }
      |      ^
      |      ;
a.cc: In static member function 'static void Yuzuki::Yukari::Main(int*)':
a.cc:16:13: error: 'string' was not declared in this scope
   16 |             string[] buf = Console.ReadLine().Split();
      |             ^~~~~~
a.cc:16:20: error: expected primary-expression before ']' token
   16 |             string[] buf = Console.ReadLine().Split();
      |                    ^
a.cc:17:21: error: expected primary-expression before 'int'
   17 |             int a = int.Parse(buf[0]);
      |                     ^~~
a.cc:18:21: error: expected primary-expression before 'int'
   18 |             int b = int.Parse(buf[1]);
      |                     ^~~
a.cc:19:21: error: expected primary-expression before 'int'
   19 |             int m = int.Parse(buf[2]);
      |                     ^~~
a.cc:21:16: error: structured binding declaration cannot have type 'int'
   21 |             int[] As = new int[a];
      |                ^~
a.cc:21:16: note: type must be cv-qualified 'auto' or reference to cv-qualified 'auto'
a.cc:21:16: error: empty structured binding declaration
a.cc:21:19: error: expected initializer before 'As'
   21 |             int[] As = new int[a];
      |                   ^~
a.cc:22:16: error: structured binding declaration cannot have type 'int'
   22 |             int[] Bs = new int[b];
      |                ^~
a.cc:22:16: note: type must be cv-qualified 'auto' or reference to cv-qualified 'auto'
a.cc:22:16: error: empty structured binding declaration
a.cc:22:19: error: expected initializer before 'Bs'
   22 |             int[] Bs = new int[b];
      |                   ^~
a.cc:24:13: error: 'buf' was not declared in this scope
   24 |             buf = Console.ReadLine().Split();
      |             ^~~
a.cc:24:19: error: 'Console' was not declared in this scope
   24 |             buf = Console.ReadLine().Split();
      |                   ^~~~~~~
a.cc:27:17: error: 'As' was not declared in this scope
   27 |                 As[_] = int.Parse(buf[_]);
      |                 ^~
a.cc:27:25: error: expected primary-expression before 'int'
   27 |                 As[_] = int.Parse(buf[_]);
      |                         ^~~
a.cc:32:17: error: 'Bs' was not declared in this scope
   32 |                 Bs[_] = int.Parse(buf[_]);
      |                 ^~
a.cc:32:25: error: expected primary-expression before 'int'
   32 |                 Bs[_] = int.Parse(buf[_]);
      |                         ^~~
a.cc:35:23: error: 'As' was not declared in this scope
   35 |             int ans = As.Min() + Bs.Min();
      |                       ^~
a.cc:35:34: error: 'Bs' was not declared in this scope
   35 |             int ans = As.Min() + Bs.Min();
      |                                  ^~
a.cc:40:25: error: expected primary-expression before 'int'
   40 |                 int x = int.Parse(buf[0]);
      |                         ^~~
a.cc:41:25: error: expected primary-expression before 'int'
   41 |                 int y = int.Parse(buf[1]);
      |                         ^~~
a.cc:42:25: error: expected primary-expression before 'int'
   42 |                 int c = int.Parse(buf[2]);
      |                         ^~~
a.cc:43:23: error: 'Min' was not declared in this scope; did you mean 'Main'?
   43 |                 ans = Min(ans, As[x - 1] + Bs[y - 1] - c);
      |                       ^~~
      |                       Main