Advent_2022_2

Day2_1.cs

using System;
using System.Linq;

public class Program
{
	public static void Main()
	{
		var s = @"A Y
B X
C Z";
		Console.WriteLine(s.Split("\n").Sum(Score));
	}

	static int Score(string input) => input switch
	{
		("A Y") => 2 + 6,
		("B Y") => 2 + 3,
		("C Y") => 2 + 0,
		("A X") => 1 + 3,
		("B X") => 1 + 0,
		("C X") => 1 + 6,
		("A Z") => 3 + 0,
		("B Z") => 3 + 6,
		("C Z") => 3 + 3,
	};
}

Day2_1.fs

let s = """A Y
B X
C Z"""

let score x =
    match x with 
    | "A Y" -> 2 + 6
    | "B Y" -> 2 + 3
    | "C Y" -> 2 + 0
    | "A X" -> 1 + 3
    | "B X" -> 1 + 0
    | "C X" -> 1 + 6
    | "A Z" -> 3 + 0
    | "B Z" -> 3 + 6
    | "C Z" -> 3 + 3
    | _ -> 0

s.Split "\n"
|> Array.sumBy score
|> printfn "%i"

Day2_2.cs

using System;
using System.Linq;

public class Program
{
	public static void Main()
	{
		var s = @"A Y
B X
C Z";
		Console.WriteLine(s.Split("\n").Sum(Score));
	}

	static int Score(string input) => input switch
	{
		("A Y") => 1 + 3, // ok
		("B Y") => 2 + 3,
		("C Y") => 3 + 3,
		("A X") => 3 + 0,
		("B X") => 1 + 0, // ok
		("C X") => 2 + 0,
		("A Z") => 2 + 6,
		("B Z") => 3 + 6,
		("C Z") => 1 + 6, // ok
	};
}

Day2_2.fs

let s = """A Y
B X
C Z"""

let score x =
    match x with 
    | "A Y" -> 1 + 3
    | "B Y" -> 2 + 3
    | "C Y" -> 3 + 3
    | "A X" -> 3 + 0
    | "B X" -> 1 + 0
    | "C X" -> 2 + 0
    | "A Z" -> 2 + 6
    | "B Z" -> 3 + 6
    | "C Z" -> 1 + 6
    | _ -> 0

s.Split "\n"
|> Array.sumBy score
|> printfn "%i"

Alternative with an array:

let s = """A Y
B X
C Z"""

let score input =
  1 + List.findIndex (fun x -> x = input) [
    "B X";
    "C X";
    "A X";
    "A Y";
    "B Y";
    "C Y";
    "C Z";
    "A Z";
    "B Z" ]

s.Split "\n"
|> Array.sumBy score
|> printfn "%i"