SneakingNikoladze

using System;
using System.Collections.Generic;
using System.Linq;

namespace Sneaking
{
    class Program
    {
        static void Main(string[] args)
        {
            int rows = int.Parse(Console.ReadLine());

            var jagged = new char[rows][];

            var samRow = -1;
            var samCol = -1;

            for (int row = 0; row < rows; row++)
            {
                var input = Console.ReadLine();

                jagged[row] = input.ToCharArray();

                if (jagged[row].Contains('S'))
                {
                    var currentIndex = Array.IndexOf(jagged[row], 'S');
                    samRow = row;
                    samCol = currentIndex;
                    jagged[samRow][samCol] = '.';
                }
            }

            char[] directions = Console.ReadLine().ToCharArray();

            foreach (var direction in directions)
            {
                MoveEnemies(jagged);

                if ((jagged[samRow].Contains('b')
                    && Array.IndexOf(jagged[samRow], 'b') < samCol)
                    ||
                    (jagged[samRow].Contains('d')
                    && Array.IndexOf(jagged[samRow], 'd') > samCol))
                {
                    jagged[samRow][samCol] = 'X';
                    Console.WriteLine($"Sam died at {samRow}, {samCol}");
                    break;
                }

                switch (direction)
                {
                    case 'U': samRow--; break;
                    case 'D': samRow++; break;
                    case 'L': samCol--; break;
                    case 'R': samCol++; break;
                    default: break;
                }

                if (jagged[samRow][samCol] == 'b' ||
                    jagged[samRow][samCol] == 'd')
                {
                    jagged[samRow][samCol] = '.';
                }

                if (jagged[samRow].Contains('N'))
                {
                    int nikoladzeCol = Array.IndexOf(jagged[samRow], 'N');
                    jagged[samRow][nikoladzeCol] = 'X';
                    jagged[samRow][samCol] = 'S';
                    Console.WriteLine("Nikoladze killed!");
                    break;
                }
            }

            foreach (var row in jagged)
            {
                Console.WriteLine(string.Join("",row));
            }
        }

        private static void MoveEnemies(char[][] jagged)
        {
            for (int row = 0; row < jagged.Length; row++)
            {
                int rowLength = jagged[row].Length;

                if (jagged[row].Contains('b')
                    && Array.IndexOf(jagged[row], 'b') < rowLength - 1)
                {
                    int index = Array.IndexOf(jagged[row], 'b');
                    jagged[row][index] = '.';
                    jagged[row][index + 1] = 'b';
                }
                else if (jagged[row].Contains('b')
                    && Array.IndexOf(jagged[row], 'b') == rowLength - 1)
                {
                    jagged[row][rowLength - 1] = 'd';
                }
                else if (jagged[row].Contains('d')
                    && Array.IndexOf(jagged[row], 'd') > 0)
                {
                    int index = Array.IndexOf(jagged[row], 'd');
                    jagged[row][index] = '.';
                    jagged[row][index - 1] = 'd';
                }
                else if (jagged[row].Contains('d')
                    && Array.IndexOf(jagged[row], 'd') == 0)
                {
                    jagged[row][0] = 'b';
                }
            }
        }
    }
}