public static void Main()
Console.WriteLine("Hello World");
_a_size = Convert.ToInt32(Console.ReadLine());
string[] _a = new string[_a_size];
for (int _a_i = 0; _a_i < _a_size; _a_i++)
_a_item = Console.ReadLine();
_b_size = Convert.ToInt32(Console.ReadLine());
string[] _b = new string[_b_size];
for (int _b_i = 0; _b_i < _b_size; _b_i++)
_b_item = Console.ReadLine();
for (int res_i = 0; res_i < res.Length; res_i++)
Console.WriteLine(res[res_i]);
public static string[] twins(string[] a, string[] b)
string[] Text=new String[4];
if ((replaceString.Length % 2).Equals(1))
char[] arrayswapped = replaceString.ToCharArray();
for (int i = 0; i < arrayswapped.Length; i += 2)
char temp = arrayswapped[i];
arrayswapped[i] = arrayswapped[i + 1];
arrayswapped[i + 1] = temp;
string arrayswapped1=new string(arrayswapped);
Console.Write(arrayswapped1);
if(arrayswapped1 == newstring)
public static string replacestrings(string replaceString)
if ((replaceString.Length % 2).Equals(1))
char[] arrayswapped = replaceString.ToCharArray();
for (int i = 0; i < arrayswapped.Length; i += 2)
char temp = arrayswapped[i];
arrayswapped[i] = arrayswapped[i + 1];
arrayswapped[i + 1] = temp;
return new string(arrayswapped);