[백준 단계별로 풀어보기] 2차원 배열 with C#

2738번: 행렬 덧셈

using System.Text;
class Program
{
    static void Main(string[] args)
    {
      string[] rowColumnCount = Console.ReadLine().Split();

      var row = int.Parse(rowColumnCount[0]);
      var column = int.Parse(rowColumnCount[1]);

      var twoDimensionalArray = new int[row, column];
      var twoDimensionalArray2 = new int[row, column];
      var resultArray = new int[row, column];

      for (int i = 0; i < row; i++)
      {
        var array = Console.ReadLine().Split();

        for (var y = 0; y < column; y++)
        {
          twoDimensionalArray[i, y] = int.Parse(array[y]);
        }
      }

      for (int i = 0; i < row; i++)
      {
        var array = Console.ReadLine().Split();

        for (var y = 0; y < column; y++)
        {
          twoDimensionalArray2[i, y] = int.Parse(array[y]);
        }
      }

      for (int i = 0; i < row; i++)
      {
        for (var y = 0; y < column; y++)
        {
          resultArray[i, y] = twoDimensionalArray[i, y] + twoDimensionalArray2[i, y];
        }
      }


      StringBuilder stringBuilder = new StringBuilder();
      for (int i = 0; i < row; i++)
      {
        for (var y = 0; y < column; y++)
        {
          if ((y + 1) % column == 0)
          {
            stringBuilder.Append(resultArray[i, y]);
          }
          else
          {
            stringBuilder.AppendFormat("{0} ", resultArray[i, y]);
          }
        }
        Console.WriteLine(stringBuilder);
        stringBuilder.Clear();
      }
    }
}

2566번: 최댓값

var twoDimensionalArray = new int[9, 9];
      int max = 0;
      int row = 0;
      int column = 0;

      for (int i = 0; i < 9; i++)
      {
        var array = Console.ReadLine().Split();

        for (var y = 0; y < 9; y++)
        {
          twoDimensionalArray[i, y] = int.Parse(array[y]);
        }
      }

      for (int i = 0; i < 9; i++)
      {
        for (var y = 0; y < 9; y++)
        {
          if (twoDimensionalArray[i, y] > max)
          {
            max = twoDimensionalArray[i, y];
            row = i;
            column = y;
          }
        }
      }

      Console.WriteLine(max);
      Console.WriteLine($"{row + 1} {column + 1}");

10798번: 세로읽기

using System.Text;  
class Program
  {
    static void Main(string[] args)
    {
      var arr = new char[5][];
      int row = 5;
      int column = 0;


      for (var i = 0; i < row; i++)
      {
        char[] inputArray = Console.ReadLine().ToCharArray();
        arr[i] = inputArray;
        if (inputArray.Length > column)
        {
          column = inputArray.Length;
        }

      }

      StringBuilder stringBuilder = new StringBuilder();

      for (var i = 0; i < column; i++)
      {
        for (var y = 0; y < row; y++)
        {
          if (arr[y].Length - 1 < i)
            continue;

          stringBuilder.Append(arr[y][i].ToString());
        }
      }

      Console.WriteLine(stringBuilder);

    }
  }