Day 1 and 2 :)

AdventOfCode2023/src/day2/day2.zig

@@ -0,0 +1,66 @@
+const std = @import("std");
+
+const Rgb = struct {
+    red: usize,
+    green: usize,
+    blue: usize,
+};
+
+pub fn solve(input: [][]const u8) !void {
+    const dices = Rgb{ .red = 12, .green = 13, .blue = 14 };
+    var part1: usize = 0;
+    var part2: usize = 0;
+
+    for (input) |line| {
+        var splitIter = std.mem.splitSequence(u8, line, ": ");
+
+        var game = splitIter.next().?;
+        var gameInput = splitIter.next().?;
+        var gameNum = try std.fmt.parseInt(usize, game[5..], 10);
+
+        var gameSteps = std.mem.splitSequence(u8, gameInput, "; ");
+        var part1Count = true;
+
+        var highestDice = Rgb{ .red = 0, .green = 0, .blue = 0 };
+
+        while (gameSteps.next()) |step| {
+            var singleDice = std.mem.tokenizeAny(u8, step, ", ");
+            var stepDices = Rgb{ .red = 0, .green = 0, .blue = 0 };
+
+            while (singleDice.next()) |dice| {
+                var diceNum = try std.fmt.parseInt(usize, dice, 10);
+                var colour = singleDice.next().?;
+                if (std.mem.eql(u8, colour, "red")) {
+                    stepDices.red = diceNum;
+                } else if (std.mem.eql(u8, colour, "green")) {
+                    stepDices.green = diceNum;
+                } else if (std.mem.eql(u8, colour, "blue")) {
+                    stepDices.blue = diceNum;
+                }
+            }
+
+            if (part1Count and !(stepDices.red <= dices.red and stepDices.green <= dices.green and stepDices.blue <= dices.blue)) {
+                part1Count = false;
+            }
+
+            if (highestDice.red < stepDices.red) {
+                highestDice.red = stepDices.red;
+            }
+            if (highestDice.green < stepDices.green) {
+                highestDice.green = stepDices.green;
+            }
+            if (highestDice.blue < stepDices.blue) {
+                highestDice.blue = stepDices.blue;
+            }
+        }
+
+        if (part1Count) {
+            part1 += gameNum;
+        }
+
+        part2 += highestDice.red * highestDice.green * highestDice.blue;
+    }
+
+    std.debug.print("Part 1: {}\n", .{part1});
+    std.debug.print("Part 2: {}\n", .{part2});
+}