TargetPractice

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TargetPractice
{
    class Program
    {
        public static bool IsInRectangle(double centerX, double centerY, double radius,
    double x, double y)
        {
            return x >= centerX - radius && x <= centerX + radius &&
                y >= centerY - radius && y <= centerY + radius;
        }

        public static bool IsPointInCircle(double centerX, double centerY,
            double radius, double x, double y)
        {
            if (IsInRectangle(centerX, centerY, radius, x, y))
            {
                double dx = centerX - x;
                double dy = centerY - y;
                dx *= dx;
                dy *= dy;
                double distanceSquared = dx + dy;
                double radiusSquared = radius * radius;
                return distanceSquared <= radiusSquared;
            }
            return false;
        }
        static void Main(string[] args)
        {
            string firstLine = Console.ReadLine();
            string[] dimensionsArray = firstLine.Split(' ');
            int rows = int.Parse(dimensionsArray[0]);
            int cols = int.Parse(dimensionsArray[1]);
            string snake = Console.ReadLine();
            string[] shotParams = Console.ReadLine().Split(' ');
            int impactRow = int.Parse(shotParams[0]);
            int impactCol = int.Parse(shotParams[1]);
            int radius = int.Parse(shotParams[2]);

            char[,] matrix = new char[rows, cols];

            int countLine = -1;
            int countSnakeChar = -1;
            for (int i = rows - 1; i >= 0; i--)
            {
                countLine++;

                if (countLine%2 == 0)
                {

                    for (int j = cols - 1; j >= 0; j--)
                    {
                        countSnakeChar++;
                        if (countSnakeChar == snake.Length)
                        {
                            countSnakeChar = 0;
                        }
                        matrix[i, j] = snake[countSnakeChar];
                    }
                }
                else
                {

                    for (int j = 0; j < cols; j++)
                    {
                        countSnakeChar++;
                        if (countSnakeChar == snake.Length)
                        {
                            countSnakeChar = 0;
                        }
                        matrix[i, j] = snake[countSnakeChar];
                    }
                }
            }



            for (int i = 0; i < rows; i++)
            {
                for (int j = 0; j < cols; j++)
                {
                    if (IsPointInCircle(impactRow, impactCol, radius, i, j))
                    {
                        matrix[i, j] = ' ';
                    }
                }

            }

            for (int a = 0; a < rows; a++)
            {
                for (int i = rows - 2; i >= 0; i--)
                {
                    for (int j = 0; j < cols; j++)
                    {
                        var ch = matrix[i, j];
                        var under = matrix[i + 1, j];
                        if (under == ' ')
                        {
                            matrix[i + 1, j] = ch;
                            matrix[i, j] = ' ';
                        }
                    }
                }
            }

            for (int i = 0; i < rows; i++)
            {
                for (int j = 0; j < cols; j++)
                {
                    Console.Write(matrix[i, j] + "");
                }
                Console.WriteLine();
            }
        }
    }
}