using System;

​

public class Program

{

    public static void Main()

    {   

        int[, ] matrix = new int[5, 10];

        for (int i = 0; i < matrix.GetLength(0) * matrix.GetLength(1); i++)

        {

            int row = i / matrix.GetLength(0);

            int column = i % matrix.GetLength(1);

            matrix[row, column] = i;

        }

    }

}