82 lines
3.0 KiB
C#
82 lines
3.0 KiB
C#
namespace Day_02.Day_02
|
|
{
|
|
public class Day02
|
|
{
|
|
private static string inputPath = "Day 02/day-02-input.txt";
|
|
|
|
private static int Win = 6, Draw = 3, Lost = 0, Rock = 1, Paper = 2, Scissors = 3;
|
|
|
|
private static string OpponentRock = "A", OpponentPaper = "B", OpponentScissors = "C",
|
|
PlayRock = "X", PlayPaper = "Y", PlayScissors = "Z",
|
|
PlayWin = "Z", PlayDraw = "Y", PlayLose = "X";
|
|
|
|
private static Dictionary<string, int> PossibleScores;
|
|
|
|
private static void BuildScoreDic()
|
|
{
|
|
if (PossibleScores == null)
|
|
{
|
|
PossibleScores = new Dictionary<string, int>
|
|
{
|
|
// Rock combos
|
|
{ OpponentRock + " " + PlayPaper, Paper + Win }, // win
|
|
{ OpponentRock + " " + PlayRock, Rock + Draw }, // draw
|
|
{ OpponentRock + " " + PlayScissors, Scissors + Lost }, // lose
|
|
|
|
// Paper
|
|
{ OpponentPaper + " " + PlayScissors, Scissors + Win }, // win
|
|
{ OpponentPaper + " " + PlayPaper, Paper + Draw }, // draw
|
|
{ OpponentPaper + " " + PlayRock, Rock + Lost }, // lose
|
|
|
|
// Scissors
|
|
{ OpponentScissors + " " + PlayRock, Rock + Win }, // win
|
|
{ OpponentScissors + " " + PlayScissors, Scissors + Draw }, // draw
|
|
{ OpponentScissors + " " + PlayPaper, Paper + Lost } // lose
|
|
};
|
|
}
|
|
}
|
|
|
|
private static void BuildWinDrawLoseTable()
|
|
{
|
|
if (PossibleScores == null)
|
|
{
|
|
PossibleScores = new Dictionary<string, int>
|
|
{
|
|
// Rock combos
|
|
{ OpponentRock + " " + PlayWin, Paper + Win }, // win
|
|
{ OpponentRock + " " + PlayDraw, Rock + Draw }, // draw
|
|
{ OpponentRock + " " + PlayLose, Scissors + Lost }, // lose
|
|
|
|
// Paper
|
|
{ OpponentPaper + " " + PlayWin, Scissors + Win }, // win
|
|
{ OpponentPaper + " " + PlayDraw, Paper + Draw }, // draw
|
|
{ OpponentPaper + " " + PlayLose, Rock + Lost }, // lose
|
|
|
|
// Scissors
|
|
{ OpponentScissors + " " + PlayWin, Rock + Win }, // win
|
|
{ OpponentScissors + " " + PlayDraw, Scissors + Draw }, // draw
|
|
{ OpponentScissors + " " + PlayLose, Paper + Lost } // lose
|
|
};
|
|
}
|
|
}
|
|
|
|
private static int GetScore(string input) => PossibleScores[input];
|
|
|
|
public static int GetPart1()
|
|
{
|
|
BuildScoreDic();
|
|
return File.ReadAllLines(inputPath)
|
|
.Select(GetScore)
|
|
.Sum();
|
|
}
|
|
|
|
public static int GetPart2()
|
|
{
|
|
BuildWinDrawLoseTable();
|
|
return File.ReadAllLines(inputPath)
|
|
.Select(GetScore)
|
|
.Sum();
|
|
}
|
|
}
|
|
}
|