/// <summary>
/// The main method that is called outside this class that will solve the puzzle
/// and return the answer
/// </summary>
/// <returns>The answer to the puzzle</returns>
public int solvePuzzle()
{
// load the puzzle data into memory
string puzzleData = this.LoadPuzzleDataIntoMemory();
// split puzzel data into each line
string[] puzzleDataSplitIntoLines = puzzleData.Split("\r\n", StringSplitOptions.RemoveEmptyEntries);
// a place to hole all the seatID's when we have computed them
List <int> seatIDList = new List <int>();
// go through each line (bording pass)
foreach (string aBordingPassAsString in puzzleDataSplitIntoLines)
{
BoardingPass.BoardingPass aBordingPass = new BoardingPass.BoardingPass();
// pass in the bording pass which will parse the data to work out which row, colum and seatID the person has
aBordingPass.parseBoardingPass(aBordingPassAsString);
// add this bording passes seat ID to the list
seatIDList.Add(aBordingPass.seatID);
}
// sort the seat ID's from smallest to biggiest
seatIDList.Sort();
// return the last seat id in the list which will be the biggest number
return(seatIDList[seatIDList.Count - 1]);
}
/// <summary>
/// The main method that is called outside this class that will solve the puzzle
/// and return the answer
/// </summary>
/// <returns>The answer to the puzzle</returns>
public int solvePuzzle()
{
// load the puzzle data into memory
string puzzleData = this.LoadPuzzleDataIntoMemory();
// split puzzel data into each line
string[] puzzleDataSplitIntoLines = puzzleData.Split("\r\n", StringSplitOptions.RemoveEmptyEntries);
// a place to hole all the seatID's when we have computed them
List <int> seatIDList = new List <int>();
// go through each line (bording pass)
foreach (string aBordingPassAsString in puzzleDataSplitIntoLines)
{
BoardingPass.BoardingPass aBordingPass = new BoardingPass.BoardingPass();
// pass in the bording pass which will parse the data to work out which row, colum and seatID the person has
aBordingPass.parseBoardingPass(aBordingPassAsString);
// add this bording passes seat ID to the list
seatIDList.Add(aBordingPass.seatID);
}
// sort the seat ID's from smallest to biggiest
seatIDList.Sort();
// this will be the answer to part 2 of the puzzle
int missingSeatID = -1;
// go through each seatid in the list seatIDList
for (int i = 0; i < seatIDList.Count - 1; i++)
{
// look to see if the next seat in the list is one number bigger
// to the current seatid we are looking at in the list.
// if its not one bigger, we have found the answer to part 2 of the puzzle
if (seatIDList[i + 1] != seatIDList[i] + 1)
{
//int thisSeatID = seatIDList[i];
//int nextSeatID = seatIDList[i + 1];
missingSeatID = seatIDList[i] + 1;
break;
}
}
// the seat id that was missing in the seatIDList
return(missingSeatID);
}