View difference between Paste ID: Nuqj7hW9 and Y8Fgt6wc

 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();
             }
         }
     }
 }