From c6d6b73b9cc2decbeaf2814df9e053eb911f68a7 Mon Sep 17 00:00:00 2001
From: Dustin Swan <dustin@dustinswan.com>
Date: Sat, 2 Dec 2023 16:44:21 -0700
Subject: [PATCH] Day 2. Rushed. Could be a lot cleaner.

---
 day2/data.txt | 100 +++++++++++++++++++++++++++++++++++++++++
 day2/main.zig | 122 ++++++++++++++++++++++++++++++++++++++++++++++++++
 day2/test.txt |   5 +++
 3 files changed, 227 insertions(+)
 create mode 100644 day2/data.txt
 create mode 100644 day2/main.zig
 create mode 100644 day2/test.txt

diff --git a/day2/data.txt b/day2/data.txt
new file mode 100644
index 0000000..02772c8
--- /dev/null
+++ b/day2/data.txt
@@ -0,0 +1,100 @@
+Game 1: 7 red, 14 blue; 2 blue, 3 red, 3 green; 4 green, 12 blue, 15 red; 3 green, 12 blue, 3 red; 11 red, 2 green
+Game 2: 16 blue, 9 red, 5 green; 8 red; 8 blue, 5 green, 12 red; 11 blue, 8 green, 17 red
+Game 3: 8 green, 1 blue, 7 red; 12 red, 6 blue, 9 green; 2 blue, 1 red, 14 green; 9 green, 4 red; 2 red, 1 blue, 8 green
+Game 4: 1 blue, 3 green; 2 green, 1 blue, 1 red; 1 red, 3 green
+Game 5: 6 red, 1 blue; 1 green; 5 red, 2 green; 1 red, 1 blue, 3 green
+Game 6: 3 green, 4 red, 1 blue; 2 blue, 5 green, 2 red; 12 green, 3 blue, 2 red; 4 blue, 1 green, 4 red; 11 green, 6 red; 5 green, 10 red, 3 blue
+Game 7: 2 blue, 3 green, 16 red; 1 blue, 3 red; 2 green, 13 red; 18 red, 2 blue, 1 green; 3 red, 1 blue
+Game 8: 4 red, 3 blue, 8 green; 2 red, 16 green; 2 red, 1 blue
+Game 9: 4 green, 14 blue, 8 red; 17 blue, 3 red, 5 green; 2 green, 4 red, 6 blue; 7 red, 2 green, 18 blue; 3 red, 19 blue, 4 green; 4 green, 8 red, 6 blue
+Game 10: 12 green, 7 red, 1 blue; 6 red, 12 green; 6 red, 7 green, 1 blue; 1 red, 1 blue, 18 green; 11 green, 1 blue
+Game 11: 10 green, 3 red, 13 blue; 13 blue, 6 green, 8 red; 12 blue, 4 green, 8 red; 9 green, 9 red, 3 blue; 6 blue, 7 green, 6 red; 11 blue, 13 green
+Game 12: 9 green, 2 blue; 4 green, 1 blue, 7 red; 2 green, 1 blue, 5 red
+Game 13: 1 green; 7 blue, 1 red, 2 green; 8 blue, 2 green
+Game 14: 8 red, 3 green; 1 red, 8 green; 1 blue, 10 green
+Game 15: 1 blue, 6 green, 14 red; 3 red, 1 blue, 6 green; 4 green; 1 blue, 5 green, 2 red; 2 blue, 1 green, 6 red; 4 red, 8 green, 1 blue
+Game 16: 1 green, 6 red, 8 blue; 1 green, 11 blue, 1 red; 7 blue, 3 green, 4 red; 2 green, 6 red, 12 blue
+Game 17: 3 blue, 4 red, 4 green; 18 blue, 6 red, 11 green; 2 green, 6 red, 17 blue; 12 green, 3 blue, 5 red
+Game 18: 3 green, 2 blue, 10 red; 7 green, 10 blue; 9 blue, 7 red, 14 green; 18 green, 10 blue, 11 red; 10 red, 2 blue, 16 green
+Game 19: 6 red, 1 green, 18 blue; 2 red, 1 blue; 7 blue, 3 red, 2 green; 18 blue, 2 green, 1 red; 7 red, 10 blue
+Game 20: 13 blue, 2 red; 2 green, 2 red; 1 green, 9 blue
+Game 21: 4 blue, 1 red; 2 red, 4 blue, 1 green; 3 red; 4 green, 1 red, 1 blue; 3 green, 9 blue, 1 red
+Game 22: 7 blue, 5 green, 14 red; 15 red, 9 blue, 11 green; 10 blue, 5 red, 11 green; 14 red, 10 blue, 13 green
+Game 23: 10 red, 6 blue; 1 red, 4 blue, 3 green; 3 green, 2 blue; 5 red, 3 green; 3 green, 4 blue, 5 red; 3 green, 7 red, 6 blue
+Game 24: 4 red, 8 green; 1 red, 10 green; 2 red, 1 green; 2 green, 1 blue; 4 red, 12 green; 3 green
+Game 25: 5 red, 2 blue, 6 green; 4 red, 3 blue, 8 green; 11 green, 4 red, 1 blue
+Game 26: 5 blue, 1 red; 18 blue, 4 green; 9 green, 3 red, 17 blue; 6 green, 10 blue, 1 red; 3 blue, 7 green; 4 blue, 3 red, 5 green
+Game 27: 13 red, 2 blue; 7 blue, 2 green, 12 red; 1 green, 9 blue, 9 red; 4 red, 4 green, 8 blue; 13 red, 6 blue; 3 red, 9 blue, 3 green
+Game 28: 1 blue, 12 green, 1 red; 1 blue, 12 green, 2 red; 2 red, 8 green, 1 blue; 5 green, 2 red; 1 blue, 9 green, 6 red; 1 blue, 13 green
+Game 29: 5 blue, 5 red, 11 green; 15 blue, 5 red, 10 green; 2 red, 11 green, 19 blue; 19 blue, 3 green, 6 red
+Game 30: 1 blue, 12 red, 1 green; 12 blue, 1 red, 2 green; 12 red, 5 green; 2 red, 2 green, 5 blue; 5 red, 2 green, 6 blue
+Game 31: 20 green, 1 red, 16 blue; 3 green, 1 red, 7 blue; 6 red, 18 blue, 8 green
+Game 32: 5 green; 1 blue, 2 red, 5 green; 1 blue, 2 red, 5 green; 2 green, 2 red
+Game 33: 6 blue, 5 green; 6 blue, 3 red, 1 green; 4 green, 3 blue, 2 red; 1 red, 6 blue, 5 green; 1 blue, 2 red, 5 green; 4 red, 3 blue
+Game 34: 12 red, 12 green; 12 red, 7 green; 1 blue, 12 red, 11 green; 7 red, 7 green, 2 blue
+Game 35: 3 red, 3 blue, 1 green; 1 green, 5 red, 5 blue; 8 green, 2 red, 14 blue; 8 green; 6 blue, 3 red, 6 green; 1 red, 1 blue, 12 green
+Game 36: 13 red, 5 blue; 13 blue, 10 green, 6 red; 10 red, 5 green, 10 blue; 10 blue, 8 green, 6 red; 1 green, 14 red, 2 blue; 8 green, 4 blue
+Game 37: 6 green, 1 red; 1 blue, 4 green, 1 red; 1 red, 14 green; 1 red, 9 green; 1 green, 1 red; 9 green, 1 red
+Game 38: 1 green, 4 blue, 17 red; 13 red, 9 blue, 12 green; 7 green, 11 blue
+Game 39: 18 green, 9 blue, 2 red; 11 red, 1 blue, 4 green; 9 red, 4 green, 10 blue; 9 blue, 5 red, 2 green
+Game 40: 3 green, 8 red; 2 green, 6 red; 1 green, 9 red, 4 blue; 1 blue, 6 red; 2 green, 2 blue, 3 red
+Game 41: 3 red, 15 green, 3 blue; 19 green, 2 red, 5 blue; 8 blue, 7 green, 4 red; 3 blue, 4 red, 5 green; 1 blue; 6 blue, 15 green, 3 red
+Game 42: 2 red, 18 blue, 6 green; 3 green, 2 blue, 8 red; 9 blue, 1 green, 5 red; 12 red, 3 blue, 8 green
+Game 43: 3 blue, 1 green, 3 red; 8 blue, 3 green, 1 red; 3 red, 5 blue; 3 green, 3 red, 7 blue; 6 blue, 1 green, 2 red; 7 blue, 2 green, 5 red
+Game 44: 2 green, 5 blue, 1 red; 9 red, 16 blue; 4 blue, 2 green, 12 red; 13 red, 5 blue, 10 green; 4 green, 3 blue, 11 red
+Game 45: 6 blue, 3 red, 13 green; 10 green, 13 blue, 12 red; 7 red, 19 blue, 16 green; 15 blue, 4 red, 11 green; 1 red, 4 green
+Game 46: 11 red, 2 green; 5 blue, 2 red, 2 green; 3 green, 8 red, 6 blue; 3 blue, 10 green, 8 red
+Game 47: 6 green, 16 red; 4 blue, 4 red, 2 green; 3 blue, 1 green, 12 red; 2 red, 4 blue, 4 green; 2 blue, 16 red; 5 blue, 5 green, 5 red
+Game 48: 8 red, 1 blue; 1 green, 2 blue, 6 red; 11 red, 6 green, 2 blue
+Game 49: 5 green, 16 blue, 2 red; 2 red, 20 blue, 6 green; 1 red, 3 blue, 5 green; 7 green, 4 blue
+Game 50: 9 red, 8 green; 11 green, 10 red, 1 blue; 9 red, 5 green; 1 blue, 12 green, 8 red; 1 blue, 5 green, 2 red; 6 green, 1 blue, 2 red
+Game 51: 1 red, 4 blue; 1 red, 3 green, 3 blue; 1 green, 1 red, 2 blue
+Game 52: 11 red, 4 blue; 1 green, 6 blue, 10 red; 8 blue, 13 red
+Game 53: 6 green, 9 red; 4 blue, 13 red, 2 green; 10 red, 5 green, 3 blue; 11 red, 3 blue, 4 green
+Game 54: 16 red, 9 blue, 8 green; 9 red, 1 blue; 12 green, 2 red, 13 blue; 5 blue, 14 green, 15 red; 3 green, 2 red, 2 blue
+Game 55: 3 green, 4 blue, 5 red; 3 red, 9 green, 1 blue; 3 blue, 4 green, 5 red; 4 green, 3 blue, 7 red; 5 red, 2 blue; 2 blue, 8 red, 5 green
+Game 56: 3 red, 5 green, 3 blue; 15 red, 3 green, 15 blue; 3 green, 1 blue, 10 red; 15 blue, 1 red, 2 green; 6 red, 16 blue, 6 green; 19 red, 16 blue
+Game 57: 5 blue, 1 red, 5 green; 8 blue, 16 green; 13 green, 5 blue, 3 red; 1 blue, 1 red, 13 green; 12 green, 3 red, 4 blue; 8 blue, 3 red, 1 green
+Game 58: 5 blue, 4 green; 7 blue, 1 red, 10 green; 1 red, 13 green, 4 blue; 7 blue, 12 green, 4 red; 4 red, 13 green, 5 blue; 2 green, 1 blue, 12 red
+Game 59: 2 red, 11 blue, 6 green; 1 green, 8 blue, 3 red; 4 red, 6 blue
+Game 60: 4 green, 1 red; 3 blue, 15 red, 2 green; 13 red, 16 blue, 2 green; 6 green, 13 blue, 10 red; 15 blue, 11 red, 5 green; 7 blue, 4 green
+Game 61: 14 red, 2 green, 14 blue; 1 green, 15 red, 3 blue; 2 green, 8 blue
+Game 62: 13 green, 13 blue; 1 red, 6 green, 1 blue; 13 blue, 16 green; 3 blue, 1 red, 2 green
+Game 63: 10 blue, 3 red, 4 green; 15 red; 10 blue, 10 green, 14 red; 9 blue, 6 green; 3 blue, 7 green, 13 red
+Game 64: 2 red, 4 green; 1 blue, 9 red; 1 green, 2 blue, 10 red; 9 red, 1 blue, 5 green; 6 green, 6 red
+Game 65: 10 blue, 4 green; 4 green, 2 red, 9 blue; 11 red, 1 green, 10 blue; 14 green, 19 blue, 3 red; 12 red, 5 blue, 11 green; 14 blue, 12 green, 11 red
+Game 66: 5 blue, 2 red; 5 blue, 1 green, 7 red; 14 red, 1 green, 2 blue; 8 red, 7 blue; 2 red, 4 blue, 1 green; 2 blue, 18 red
+Game 67: 6 red, 1 blue; 5 green, 2 blue, 1 red; 2 red, 3 green, 3 blue; 8 green, 4 blue, 6 red
+Game 68: 4 blue, 1 green; 12 blue, 2 red, 3 green; 2 green, 7 blue; 1 red, 19 blue, 3 green
+Game 69: 6 green, 11 red, 2 blue; 1 blue, 7 green, 6 red; 1 blue, 8 red; 17 red, 3 blue, 5 green
+Game 70: 2 green, 6 red, 4 blue; 2 green, 7 red, 1 blue; 11 blue, 1 green
+Game 71: 10 blue, 9 red; 3 red, 10 blue; 1 red, 8 blue, 2 green; 7 blue, 4 green, 5 red; 6 red, 2 blue, 7 green; 5 red, 2 blue, 4 green
+Game 72: 1 green, 12 blue, 8 red; 9 red, 3 blue; 2 red, 2 green, 10 blue
+Game 73: 7 red, 3 green, 11 blue; 4 green, 7 blue; 6 blue, 13 green, 9 red; 11 green, 4 blue; 12 blue, 3 red, 2 green; 9 green
+Game 74: 5 blue, 2 red; 6 red, 1 blue, 8 green; 6 green, 5 blue, 16 red; 1 green, 9 red, 3 blue; 12 green, 1 red, 1 blue; 2 blue, 7 green, 13 red
+Game 75: 5 green, 20 red; 7 red, 6 green, 2 blue; 4 green, 2 blue; 2 blue, 1 green, 3 red; 2 blue, 2 green, 12 red; 6 red, 6 green
+Game 76: 9 red, 12 green, 3 blue; 2 blue, 1 red, 6 green; 13 green, 2 blue; 2 red, 7 green, 3 blue; 7 red, 4 green, 2 blue; 2 red, 3 blue, 3 green
+Game 77: 2 blue, 6 red; 4 red, 15 green, 1 blue; 7 green, 5 blue, 6 red; 4 red, 5 blue
+Game 78: 5 blue, 3 red, 1 green; 2 green, 7 red, 3 blue; 3 blue, 5 red, 5 green
+Game 79: 6 red, 9 blue, 1 green; 9 green, 8 red, 7 blue; 1 blue, 12 green, 13 red; 7 red, 14 blue, 2 green; 13 blue, 4 green, 9 red; 4 blue, 2 green
+Game 80: 4 green, 2 blue; 5 green, 3 red, 8 blue; 9 blue, 11 red, 4 green; 2 blue, 3 green, 4 red; 5 red
+Game 81: 8 red, 3 blue, 4 green; 13 blue, 8 red, 1 green; 6 blue, 1 green; 18 green, 6 red, 10 blue; 17 green, 8 blue, 3 red; 6 red, 5 green, 12 blue
+Game 82: 3 red, 7 blue; 4 red, 6 blue, 14 green; 9 blue, 2 green, 3 red
+Game 83: 1 blue, 2 red; 5 green, 16 red; 12 red, 1 green; 8 green, 8 red
+Game 84: 3 red, 9 green, 1 blue; 3 red, 6 blue, 7 green; 5 red, 8 green, 8 blue; 5 red, 3 blue, 11 green; 3 green, 4 blue; 4 green, 1 blue, 2 red
+Game 85: 4 red, 6 blue, 1 green; 7 red, 6 blue; 9 red, 1 green; 1 blue, 1 green, 10 red; 2 red, 2 blue, 1 green; 5 blue, 7 red
+Game 86: 4 blue, 5 green, 6 red; 9 red, 3 blue; 5 green, 3 red, 10 blue; 3 green, 7 blue, 3 red; 4 red; 4 green, 1 blue, 8 red
+Game 87: 3 red, 3 green; 3 blue, 1 green; 3 red, 3 green; 3 red, 1 blue, 3 green; 2 green, 1 red
+Game 88: 1 red, 13 green, 3 blue; 17 blue, 14 green, 5 red; 3 red, 19 blue, 13 green; 7 green, 19 blue; 5 red, 13 green, 17 blue; 13 blue, 8 green, 2 red
+Game 89: 3 blue, 4 red; 2 green, 15 red, 1 blue; 3 green, 3 blue, 13 red; 3 blue, 9 red, 2 green; 8 red
+Game 90: 2 red, 2 green, 1 blue; 3 blue, 2 green; 1 blue, 2 green, 4 red; 3 blue
+Game 91: 13 blue, 5 green, 4 red; 17 blue, 8 red, 11 green; 1 green, 6 red, 19 blue; 12 blue, 6 green; 7 green, 2 red
+Game 92: 6 red, 4 green; 2 blue, 11 red; 4 green, 7 blue; 2 red, 12 blue, 2 green
+Game 93: 3 blue, 2 red; 2 blue, 11 red, 1 green; 7 red, 1 green; 1 red, 2 blue; 13 red, 3 blue
+Game 94: 2 blue, 1 red, 20 green; 1 red, 4 blue, 10 green; 1 red, 20 green, 13 blue; 20 green
+Game 95: 6 blue, 1 green; 3 red, 11 green; 4 blue
+Game 96: 4 red, 4 green, 3 blue; 4 green, 17 blue, 3 red; 3 red, 3 blue, 13 green; 8 red, 7 blue, 6 green
+Game 97: 5 blue, 9 green; 4 green, 4 blue; 4 red, 19 green; 2 red, 3 green; 19 green, 3 blue, 4 red; 3 red, 10 green
+Game 98: 4 blue, 10 red, 8 green; 2 red, 3 green; 5 red, 4 blue, 10 green
+Game 99: 9 blue, 12 red; 9 blue, 11 red, 13 green; 9 blue, 1 red, 13 green; 4 blue, 12 green; 10 blue, 17 red, 8 green
+Game 100: 8 red, 3 green; 4 green, 1 blue, 15 red; 10 red, 8 green, 1 blue
diff --git a/day2/main.zig b/day2/main.zig
new file mode 100644
index 0000000..560039b
--- /dev/null
+++ b/day2/main.zig
@@ -0,0 +1,122 @@
+const std = @import("std");
+
+pub fn main() !void {
+    const file = try std.fs.cwd().openFile("./data.txt", .{});
+    defer file.close();
+
+    var buffer: [30000]u8 = undefined;
+    _ = try file.readAll(&buffer);
+
+    var it = std.mem.split(u8, &buffer, "\n");
+
+    var total1: u64 = 0;
+    var total2: u64 = 0;
+
+    while (it.next()) |line| {
+        std.debug.print("{s}\n", .{line});
+
+        if (!std.ascii.isAlphanumeric(line[0])) {
+            continue;
+        }
+
+        var game: u64 = 0;
+        var busted: bool = false;
+
+        var min_red: u64 = 1;
+        var min_green: u64 = 1;
+        var min_blue: u64 = 1;
+
+        // Split the row on colons
+        var parts = std.mem.split(u8, line, ": ");
+
+        while (parts.next()) |part| {
+            // if it contais "Game", parse out the game ID
+            if (std.mem.eql(u8, part[0..4], "Game")) {
+                game = try std.fmt.parseInt(u8, part[5..], 10);
+            } else {
+                // Split the turns up by semicolons
+                var turns = std.mem.split(u8, part, "; ");
+
+                var red: u64 = 0;
+                var green: u64 = 0;
+                var blue: u64 = 0;
+
+                while (turns.next()) |turn| {
+                    // Split the colors up by commas
+                    var colors = std.mem.split(u8, turn, ", ");
+
+                    while (colors.next()) |color| {
+                        const idx = findIdx(color, ' ').?;
+                        const num = try std.fmt.parseInt(u8, color[0..idx], 10);
+
+                        if (endsWith(color, "red")) {
+                            if (num > min_red) {
+                                min_red = num;
+                            }
+                            if (num > 12) {
+                                busted = true;
+                            }
+                            red += num;
+                        } else if (endsWith(color, "green")) {
+                            if (num > min_green) {
+                                min_green = num;
+                            }
+                            if (num > 13) {
+                                busted = true;
+                            }
+                            green += num;
+                        } else if (endsWith(color, "blue")) {
+                            if (num > min_blue) {
+                                min_blue = num;
+                            }
+                            if (num > 14) {
+                                busted = true;
+                            }
+                            blue += num;
+                        }
+                    }
+                }
+            }
+        }
+
+        if (!busted) {
+            total1 += game;
+        }
+
+        const power: u64 = min_red * min_green * min_blue;
+        std.debug.print("end of game: {d} {d} {d}\n", .{ min_red, min_green, min_blue });
+        std.debug.print("power: {d} {d}\n", .{ game, power });
+        total2 += power;
+    }
+
+    std.debug.print("part 1 total: {any}\n", .{total1});
+    std.debug.print("part 2 total: {any}\n", .{total2});
+}
+
+// does the outer string end with the inner string
+fn endsWith(outer: []const u8, inner: []const u8) bool {
+    if (outer.len < inner.len) {
+        return false;
+    }
+
+    const offset = outer.len - inner.len;
+
+    for (inner, 0..) |c, idx| {
+        if (c != outer[idx + offset]) {
+            return false;
+        }
+    }
+
+    return true;
+}
+
+// find the index of char in string
+fn findIdx(string: []const u8, char: u8) ?usize {
+    for (string, 0..) |c, idx| {
+        if (c == char) {
+            return idx;
+        }
+    }
+
+    return null;
+}
diff --git a/day2/test.txt b/day2/test.txt
new file mode 100644
index 0000000..295c36d
--- /dev/null
+++ b/day2/test.txt
@@ -0,0 +1,5 @@
+Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
+Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
+Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
+Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
+Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green