Задача: Formula Bit 1

Решение

using System;

namespace FormulaBit1 {
  class Program {
    static int gridSize = 8;
    static int[, ] grid = new int[gridSize, gridSize];
    static int trackLength = 0;
    static int turnsCount = 0;
    static char previousDirection = 'D';
    static bool finished = false;

    static void Main() {
      for (int i = 0; i < gridSize; i++) {
        int number = int.Parse(Console.ReadLine());
        for (int j = 0; j < gridSize; j++) {
          int mask = 1 << j;
          int numberAndMask = number & mask;
          int bit = numberAndMask >> j;
          grid[i, gridSize - j - 1] = (bit == 1) ? 1 : 0;
        }
      }

      buildTrack(0, 7, 'D');

      if (finished == false) {
        Console.WriteLine("No {0}", trackLength);
      }
    }

    static void checkForTrackExit(int row, int column) {
      if (row == 7 && column == 0) {
        finished = true;
        Console.WriteLine("{0} {1}", trackLength, turnsCount);
      }
    }

    static void buildTrack(int row, int column, char currentDirection) {
      if (row < 0 || column < 0 || row >= grid.GetLength(0) || column >= grid.GetLength(1)) {
        return;
      }

      if (grid[row, column] == 1) {
        return;
      }

      switch (currentDirection) {
      case 'D':
        for (int i = row; i < gridSize; i++) {
          if (grid[i, column] == 0) {
            trackLength += 1;
            checkForTrackExit(i, column);
            if (i == (gridSize - 1)) {
              turnsCount++;
              previousDirection = 'D';
              buildTrack(i, column - 1, 'L');
            }
            continue;
          } else {
            turnsCount++;
            previousDirection = 'D';
            buildTrack(i - 1, column - 1, 'L');
            break;
          }
        }
        break;
      case 'L':
        for (int i = column; i >= 0; i--) {
          if (grid[row, i] == 0) {
            trackLength += 1;
            checkForTrackExit(row, i);
            if (i == 0) {
              if (previousDirection == 'D') {
                turnsCount++;
                previousDirection = 'L';
                buildTrack(row - 1, i, 'U');
              } else {
                turnsCount++;
                previousDirection = 'L';
                buildTrack(row + 1, i, 'D');
              }
            }
            continue;
          } else {
            if (previousDirection == 'U') {
              turnsCount++;
              previousDirection = 'L';
              buildTrack(row + 1, i + 1, 'D');
              break;
            } else {
              turnsCount++;
              previousDirection = 'L';
              buildTrack(row - 1, i + 1, 'U');
              break;
            }
          }

        }
        break;
      case 'U':
        for (int i = row; i >= 0; i--) {
          if (grid[i, column] == 0) {
            trackLength += 1;
            checkForTrackExit(i, column);
            if (i == 0) {
              turnsCount++;
              previousDirection = 'U';
              buildTrack(i, column - 1, 'L');
            }
            continue;
          } else {
            turnsCount++;
            previousDirection = 'U';
            buildTrack(i + 1, column - 1, 'L');
            break;
          }
        }
        break;
      }
    }
  }
}