Skillvalue - Cells

Main.java

package fr.nargit.cells;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;

public class Main {
  public static void main(String[] args) {
    BufferedReader in;
    try {
      int steps = 0;
      in = new BufferedReader(new FileReader(new File(args[0])));
      steps = Integer.valueOf(in.readLine());
      String[] line = in.readLine().split(",");
//      String[] line = new String[]{"0", "1", "1", "1"};
//      steps = 4;

      int[] result = null;
      int[] initialState = new int[line.length];
      for (int i = 0; i < line.length; i++) {
        initialState[i] = Integer.valueOf(line[i]);
      }

      /* YOUR CODE HERE */
      final int size = initialState.length;
      for (int k = 0; k < steps; k++) {
        int[] states = new int[size];
        for (int i = 0; i < size; i++) {
          int left = left(i, size);
          int right = right(i, size);

          if (initialState[left] == 1 && initialState[right] == 1) {
            states[i] = 0;
          } else if (initialState[left] == 0 && initialState[right] == 0) {
            states[i] = 0;
          } else {
            states[i] = 1;
          }
        }
        initialState = states.clone();
      }
      result = initialState;
      for (int j = 0; j < result.length; j++) {
        System.out.print(result[j]);
        if (j < result.length - 1) {
          System.out.print(",");
        }
      }
      System.out.println();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  static int left(int position, int size) {
    if (position == 0) {
      return size - 1;
    }

    return position - 1;
  }

  static int right(int position, int size) {
    if (position == size - 1) {
      return 0;
    }
    return position + 1;
  }
}