Add 2024, day 5, part 1

Author: danielctull

Year2024/Sources/Day05.swift

@@ -0,0 +1,36 @@
+
+import Advent
+
+public enum Day05: Day {
+
+    public static let title = "Print Queue"
+
+    public static func part1(_ input: Input) throws -> Int {
+        let sections = input.lines
+            .split(separator: "")
+
+        let rules = try sections
+            .first.unwrapped
+            .map { try $0.split(separator: "|").map(Int.init) }
+            .map { try ($0.first.unwrapped, $0.last.unwrapped) }
+            .group(by: \.0)
+            .mapValues { Set($0.map(\.1)) }
+
+        return try sections
+            .last.unwrapped
+            .map { try $0.split(separator: ",").map(Int.init) }
+            .filter {
+                var seen: Set<Int> = []
+                return $0.allSatisfy { value in
+                    defer { seen.insert(value) }
+                    let disallowed = rules[value] ?? []
+                    return seen.intersection(disallowed).count == 0
+                }
+            }
+            .sum(of: \.middle)
+    }
+
+    public static func part2(_ input: Input) throws -> Int {
+        0
+    }
+}

Year2024/Tests/Day05Tests.swift

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+
+import Advent
+import Year2024
+import XCTest
+
+final class Day05Tests: XCTestCase {
+
+    func testPart1Examples() throws {
+        XCTAssertEqual(try Day05.part1([
+            "47|53",
+            "97|13",
+            "97|61",
+            "97|47",
+            "75|29",
+            "61|13",
+            "75|53",
+            "29|13",
+            "97|29",
+            "53|29",
+            "61|53",
+            "97|53",
+            "61|29",
+            "47|13",
+            "75|47",
+            "97|75",
+            "47|61",
+            "75|61",
+            "47|29",
+            "75|13",
+            "53|13",
+            "",
+            "75,47,61,53,29",
+            "97,61,53,29,13",
+            "75,29,13",
+            "75,97,47,61,53",
+            "61,13,29",
+            "97,13,75,29,47",
+        ]), 143)
+    }
+
+    func testPart1Puzzle() throws {
+        let input = try Bundle.module.input(named: "Day05")
+        XCTAssertEqual(try Day05.part1(input), 5091)
+    }
+
+    func testPart2Examples() throws {
+        XCTAssertEqual(try Day05.part2([]), 0)
+    }
+
+    func testPart2Puzzle() throws {
+        let input = try Bundle.module.input(named: "Day05")
+        XCTAssertEqual(try Day05.part2(input), 0)
+    }
+}