commit 6e60a3f2e61000d7efc275d6ad61ef6b3c7a5ec7
Author: Christian <me@ctsk.xyz>
Date:   Sun Dec 3 21:20:45 2023 +0100

    Setup + Days 1, 2, 3

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..493e2d2
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,61 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aho-corasick"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2969dcb958b36655471fc61f7e416fa76033bdd4bfed0678d8fee1e2d07a1f0"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "anyhow"
+version = "1.0.75"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4668cab20f66d8d020e1fbc0ebe47217433c1b6c8f2040faf858554e394ace6"
+
+[[package]]
+name = "aoc-2023"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "regex",
+]
+
+[[package]]
+name = "memchr"
+version = "2.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f665ee40bc4a3c5590afb1e9677db74a508659dfd71e126420da8274909a0167"
+
+[[package]]
+name = "regex"
+version = "1.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "380b951a9c5e80ddfd6136919eef32310721aa4aacd4889a8d39124b026ab343"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-automata",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-automata"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f804c7828047e88b2d32e2d7fe5a105da8ee3264f01902f796c8e067dc2483f"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..0c835e1
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "aoc-2023"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+anyhow = "1.0.75"
+regex = "1.10.2"
diff --git a/data/01.in b/data/01.in
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diff --git a/data/02.in b/data/02.in
new file mode 100644
index 0000000..145b929
--- /dev/null
+++ b/data/02.in
@@ -0,0 +1,100 @@
+Game 1: 1 green, 2 red, 6 blue; 4 red, 1 green, 3 blue; 7 blue, 5 green; 6 blue, 2 red, 1 green
+Game 2: 1 green, 17 red; 1 blue, 6 red, 7 green; 2 blue, 4 red, 7 green; 1 green, 6 red, 2 blue
+Game 3: 6 red, 15 blue, 15 green; 1 green, 4 red, 12 blue; 14 blue, 9 red, 1 green; 2 red, 15 blue, 12 green
+Game 4: 8 green, 10 blue, 6 red; 20 blue, 4 red; 17 blue, 2 green, 3 red; 4 blue, 2 green, 3 red; 10 red, 3 blue, 3 green; 5 green, 14 blue, 6 red
+Game 5: 3 green, 8 blue, 2 red; 11 red, 6 green, 11 blue; 8 red, 5 blue, 2 green
+Game 6: 2 blue, 12 red, 2 green; 3 green, 2 red; 3 green, 3 blue, 10 red; 7 red, 2 blue, 4 green; 1 red, 2 blue, 5 green
+Game 7: 1 red, 8 blue, 2 green; 1 red, 2 blue, 12 green; 1 blue; 3 blue, 3 green
+Game 8: 10 green, 4 red, 4 blue; 12 green, 1 blue; 1 red, 13 green, 2 blue; 12 green, 3 blue; 9 green, 7 red
+Game 9: 1 green, 1 blue, 3 red; 3 blue, 3 red, 8 green; 6 blue, 4 red, 6 green; 2 red, 7 green; 1 red, 10 green, 13 blue; 5 red, 1 blue, 1 green
+Game 10: 9 green, 3 red, 3 blue; 12 green, 2 blue; 18 green, 1 blue; 14 green; 2 blue, 9 green, 2 red
+Game 11: 14 green; 2 green, 2 red, 11 blue; 9 blue, 3 green
+Game 12: 9 green, 3 blue, 8 red; 1 green, 2 blue, 3 red; 4 blue, 8 red, 10 green; 3 blue, 7 red, 8 green; 3 blue, 5 red, 7 green; 2 blue, 5 green
+Game 13: 6 red, 1 blue, 10 green; 7 red, 1 green; 8 red, 2 green, 1 blue
+Game 14: 2 red, 4 blue, 2 green; 2 green, 5 red, 1 blue; 1 red, 6 blue
+Game 15: 7 blue, 3 red; 13 blue, 8 red, 1 green; 1 green, 5 red, 13 blue; 8 red, 5 blue; 4 red, 3 blue, 1 green; 12 blue, 8 red, 1 green
+Game 16: 5 blue, 1 green, 2 red; 2 blue, 20 green; 4 blue, 1 red, 17 green; 10 green, 5 blue, 2 red
+Game 17: 6 red, 13 blue, 8 green; 12 blue, 7 green, 9 red; 19 blue, 5 red; 2 green, 8 red, 14 blue
+Game 18: 5 red, 2 green, 1 blue; 8 blue, 17 red, 9 green; 2 blue, 1 green; 4 blue, 10 red; 5 blue, 4 red, 6 green
+Game 19: 5 red, 12 green; 8 red, 13 green, 1 blue; 1 red, 1 green, 3 blue; 5 green, 5 red
+Game 20: 11 red, 8 blue; 9 red, 2 green, 13 blue; 2 red, 1 green, 2 blue; 1 green, 9 blue, 13 red; 3 blue, 5 red, 1 green
+Game 21: 1 red, 4 green, 11 blue; 3 green, 15 blue; 6 green, 7 red, 14 blue; 15 blue, 6 green, 10 red; 6 red, 16 blue, 2 green
+Game 22: 2 blue, 15 green, 2 red; 3 blue, 6 green, 1 red; 2 blue, 5 green, 1 red; 6 green, 2 red, 2 blue; 4 green, 2 blue; 4 blue, 1 red, 15 green
+Game 23: 2 blue, 1 green, 12 red; 5 blue, 11 red, 4 green; 12 red, 4 blue; 12 red, 2 green, 5 blue
+Game 24: 4 blue, 7 red; 3 red, 3 blue; 1 red, 4 blue; 2 green, 6 red, 6 blue; 7 red, 1 green, 2 blue; 6 red, 1 blue, 1 green
+Game 25: 5 green, 9 blue; 6 green, 7 red, 2 blue; 1 red, 3 blue, 7 green; 9 blue, 3 red; 5 green, 9 blue, 2 red
+Game 26: 6 red, 4 blue; 2 blue, 4 green; 3 green, 5 red, 5 blue; 4 green, 6 red, 3 blue; 4 green, 7 red, 4 blue
+Game 27: 15 green, 1 blue, 12 red; 12 red, 1 green; 1 red, 1 blue, 5 green; 13 green, 6 red, 1 blue; 5 red, 1 blue, 1 green; 11 red, 14 green
+Game 28: 3 blue, 2 green, 10 red; 5 blue, 2 green; 4 green, 3 blue, 11 red
+Game 29: 10 blue, 2 red; 17 green, 7 blue, 2 red; 1 blue, 8 green, 1 red; 10 green, 2 red, 3 blue
+Game 30: 10 green, 8 red, 1 blue; 4 blue, 7 green, 14 red; 2 blue, 14 red, 11 green; 1 blue, 13 green, 12 red; 5 blue, 2 red, 4 green; 4 green, 5 red
+Game 31: 4 green, 11 red, 11 blue; 3 blue, 11 red; 5 blue, 7 red, 3 green; 10 blue, 5 green, 1 red
+Game 32: 4 red, 8 blue, 1 green; 14 red, 7 blue, 4 green; 13 red, 3 blue, 9 green; 3 red, 1 green, 8 blue; 8 green, 8 red, 5 blue
+Game 33: 6 red, 10 blue, 7 green; 19 blue, 1 red; 6 green, 11 red, 11 blue; 2 green, 2 blue, 12 red; 3 red, 13 blue, 7 green; 6 green, 4 red, 2 blue
+Game 34: 3 red, 3 green, 15 blue; 7 green, 15 blue; 3 red, 2 green, 8 blue; 19 green, 18 blue
+Game 35: 2 green, 1 blue; 2 green, 2 blue, 1 red; 3 blue, 1 red, 1 green; 4 blue, 1 red
+Game 36: 1 red, 11 green; 1 green, 1 blue; 8 blue; 2 green, 3 red; 1 red
+Game 37: 4 blue, 3 red; 12 blue, 13 red; 2 red, 2 green, 8 blue
+Game 38: 8 red, 2 blue; 1 green, 2 red; 8 red, 2 green, 1 blue; 16 red, 2 green; 7 red, 2 blue, 2 green
+Game 39: 6 green, 1 blue, 5 red; 14 green, 8 blue, 6 red; 8 red, 10 blue, 1 green; 14 green, 9 red; 17 blue, 5 red; 1 blue, 7 green, 1 red
+Game 40: 4 red, 8 blue, 3 green; 13 blue, 1 red; 3 blue, 7 red, 3 green; 3 green, 8 blue, 10 red; 3 green, 20 blue, 5 red
+Game 41: 1 blue, 2 green; 11 green, 2 blue; 5 blue; 15 red, 8 green, 5 blue
+Game 42: 1 green, 12 blue, 1 red; 6 blue, 1 green, 5 red; 1 red, 11 blue, 4 green; 3 red, 17 blue, 1 green; 1 red, 11 blue; 9 blue, 6 green, 3 red
+Game 43: 16 blue, 13 green, 1 red; 17 blue, 7 red, 10 green; 13 green, 5 red, 7 blue
+Game 44: 2 blue, 4 red; 15 green, 7 red; 2 green, 1 blue; 6 red, 13 green
+Game 45: 5 green, 1 blue, 8 red; 4 red, 1 blue, 5 green; 1 green, 3 red; 1 green, 2 blue, 6 red; 4 red, 3 green, 2 blue; 2 red, 2 blue, 5 green
+Game 46: 1 green, 1 red, 6 blue; 11 blue; 1 red, 1 green, 7 blue; 8 blue; 1 green, 7 blue, 2 red
+Game 47: 7 green, 9 blue, 7 red; 11 red, 13 blue, 5 green; 12 green, 12 blue, 5 red; 4 blue, 8 green, 7 red
+Game 48: 11 green, 7 red, 2 blue; 2 blue, 10 green, 3 red; 1 blue, 2 red, 1 green; 4 green, 2 red, 7 blue; 7 red, 4 green, 2 blue
+Game 49: 1 red, 2 blue, 5 green; 2 green, 4 blue; 5 blue, 2 green, 1 red; 9 blue, 1 green; 7 blue
+Game 50: 8 green, 9 blue, 2 red; 2 green, 5 blue; 14 green, 1 red, 8 blue
+Game 51: 1 green, 2 blue; 12 blue, 1 red; 2 blue
+Game 52: 3 red, 2 blue, 2 green; 4 red, 4 green, 7 blue; 2 blue, 4 red, 1 green; 3 green; 1 red, 9 green, 7 blue
+Game 53: 9 blue, 12 red, 7 green; 8 blue, 6 green; 1 green, 8 blue, 9 red; 12 red, 6 green; 9 blue, 14 red, 10 green; 7 red, 3 green, 5 blue
+Game 54: 8 green, 5 blue, 5 red; 4 green, 13 blue, 2 red; 2 blue, 5 red, 1 green; 3 red, 3 green, 10 blue
+Game 55: 17 red, 15 green, 17 blue; 6 red, 5 green, 7 blue; 17 green, 6 blue, 5 red
+Game 56: 7 blue, 6 red, 7 green; 10 green, 3 red; 9 red, 3 blue, 5 green
+Game 57: 5 blue, 11 red, 1 green; 13 red, 1 green, 2 blue; 2 blue, 4 red; 1 green, 10 red, 1 blue; 1 green, 8 red
+Game 58: 1 red, 2 green, 9 blue; 1 green, 1 blue, 1 red; 2 red, 6 blue, 2 green; 14 blue, 1 green, 1 red; 5 blue, 1 red, 2 green; 14 blue, 2 green
+Game 59: 9 green, 2 blue, 5 red; 9 red, 5 green; 10 red, 1 blue, 8 green
+Game 60: 8 blue, 6 red, 4 green; 3 red, 12 green, 9 blue; 4 blue, 5 red, 5 green; 4 red, 8 blue; 7 green, 12 blue, 6 red
+Game 61: 5 blue, 13 red, 1 green; 5 red, 5 blue; 1 red, 3 blue; 1 green, 9 red; 10 red, 3 blue, 1 green
+Game 62: 1 blue, 13 red; 4 blue, 5 red; 11 blue, 8 red, 1 green
+Game 63: 14 blue, 5 red; 9 blue, 14 green, 5 red; 3 red, 8 green, 15 blue; 4 blue, 15 green, 6 red
+Game 64: 13 red, 6 blue, 11 green; 12 red, 1 blue, 8 green; 1 red, 17 green; 13 red, 12 green, 7 blue
+Game 65: 4 red, 17 blue, 3 green; 2 green, 12 blue, 9 red; 2 green, 17 blue, 5 red; 1 red, 1 green, 4 blue; 9 red, 16 blue; 7 blue, 9 red
+Game 66: 10 blue, 10 green, 5 red; 10 green, 3 blue, 5 red; 1 red, 1 green, 10 blue; 2 green, 5 red, 20 blue; 8 blue, 11 green, 13 red; 2 green, 18 blue, 2 red
+Game 67: 6 red, 1 green; 5 red, 10 blue; 6 blue, 6 red
+Game 68: 4 green, 1 red, 5 blue; 5 red, 5 blue; 7 red, 6 green; 8 red, 1 blue
+Game 69: 2 blue, 11 red; 4 red, 6 green, 1 blue; 4 red, 1 blue, 14 green
+Game 70: 15 red, 8 blue, 5 green; 5 green, 2 red, 8 blue; 8 red, 3 green, 10 blue
+Game 71: 4 blue, 2 red; 12 green, 4 blue; 10 green
+Game 72: 3 blue, 4 green, 6 red; 6 red, 5 green, 8 blue; 10 red, 6 green, 5 blue; 1 green, 2 blue; 10 red, 5 blue, 4 green
+Game 73: 5 blue, 1 red; 1 green, 11 blue; 10 blue; 12 blue, 1 red; 1 red, 9 blue; 7 blue, 1 green, 1 red
+Game 74: 7 green, 6 blue, 7 red; 7 blue, 6 green, 15 red; 7 red, 5 blue, 1 green; 1 blue, 6 red, 8 green; 8 green, 14 red, 3 blue
+Game 75: 8 green, 3 red, 3 blue; 1 blue, 6 red, 7 green; 9 green, 3 blue; 3 blue, 9 green, 6 red; 4 blue, 1 red, 3 green; 4 green, 1 blue, 16 red
+Game 76: 4 blue, 3 green; 2 blue, 1 red, 6 green; 12 blue; 1 green, 14 blue
+Game 77: 5 green, 10 red, 11 blue; 3 red; 8 green, 6 red, 9 blue
+Game 78: 7 red, 7 green; 8 blue; 6 green, 7 red, 5 blue
+Game 79: 11 blue, 2 red, 4 green; 2 green, 3 red, 15 blue; 1 green, 15 blue, 1 red
+Game 80: 3 red, 17 green, 8 blue; 8 green, 10 blue; 4 green, 1 red, 14 blue
+Game 81: 17 green, 10 red, 10 blue; 9 green, 9 blue, 7 red; 11 red, 11 green, 4 blue; 15 blue, 5 red; 11 blue, 8 green, 15 red; 3 green, 16 red
+Game 82: 8 green, 9 blue, 1 red; 1 red, 8 green, 9 blue; 2 green, 12 blue
+Game 83: 2 green, 11 red, 20 blue; 20 blue, 1 green, 4 red; 2 green, 6 red, 20 blue; 17 blue, 10 red
+Game 84: 1 green, 9 red; 4 blue, 4 green; 1 green, 6 red, 14 blue
+Game 85: 5 red, 10 green, 9 blue; 8 blue, 3 green, 2 red; 4 blue, 14 green, 3 red; 5 red, 4 blue
+Game 86: 8 blue, 9 green, 5 red; 5 red, 10 green, 1 blue; 15 blue, 1 red, 2 green; 8 red, 8 blue, 10 green
+Game 87: 13 green, 2 red, 4 blue; 3 red, 11 green, 9 blue; 6 blue, 3 red, 12 green
+Game 88: 2 red, 7 blue, 3 green; 2 blue, 9 red; 9 red, 6 blue, 7 green; 6 green, 13 blue, 9 red; 6 green, 2 red, 15 blue; 1 red, 8 green, 7 blue
+Game 89: 11 red, 1 blue, 2 green; 6 blue, 5 green, 4 red; 15 red, 4 green, 5 blue; 11 red, 3 blue, 10 green; 6 blue, 13 green, 12 red
+Game 90: 2 red, 2 blue, 4 green; 2 red, 2 blue; 9 green, 1 red, 1 blue; 5 green, 1 red; 7 green, 2 red; 2 green, 1 blue
+Game 91: 5 blue, 3 red, 1 green; 1 red, 4 blue, 6 green; 6 blue, 6 green, 5 red
+Game 92: 16 green, 1 blue, 12 red; 18 green, 14 red, 1 blue; 16 red, 1 green; 4 blue, 16 red, 18 green
+Game 93: 9 red, 8 blue, 14 green; 1 blue, 1 green, 6 red; 4 blue, 4 red, 14 green
+Game 94: 11 green, 4 blue, 2 red; 1 red, 1 green, 1 blue; 4 red, 1 blue, 2 green
+Game 95: 5 blue, 2 red, 9 green; 5 blue, 8 green; 1 green, 15 blue; 5 red, 9 green, 5 blue; 3 green, 17 blue, 5 red
+Game 96: 2 green, 14 blue, 1 red; 3 green, 3 red, 14 blue; 2 red, 2 green, 13 blue
+Game 97: 2 green, 2 red; 2 blue, 1 green; 7 blue, 3 red
+Game 98: 2 red, 1 blue, 12 green; 2 blue, 10 green, 5 red; 11 green, 9 blue; 6 blue, 17 green; 7 blue, 9 green, 9 red; 1 red, 11 green, 9 blue
+Game 99: 2 green, 9 red, 1 blue; 3 green, 1 blue, 14 red; 5 green, 6 blue; 1 blue, 2 green, 3 red; 4 blue, 10 red, 1 green
+Game 100: 4 green, 4 blue, 15 red; 3 green, 1 red, 13 blue; 5 green, 5 blue, 10 red
diff --git a/data/03.in b/data/03.in
new file mode 100644
index 0000000..0182e0a
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diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..a5312eb
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+        "narHash": "sha256-vmMceA+q6hG1yrjb+MP8T0YFDQIrW3bl45e7z24IEts=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "8cfef6986adfb599ba379ae53c9f5631ecd2fd9c",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-unstable",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..f95f7ba
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,27 @@
+{
+  description = "Advent Of Code 2023";
+
+  inputs = {
+    nixpkgs.url = "nixpkgs/nixos-unstable";
+  };
+
+  outputs = { self, nixpkgs }:
+    let
+
+      forAllSystems = function:
+        nixpkgs.lib.genAttrs [
+          "x86_64-linux"
+          "aarch64-darwin"
+        ] (system: function nixpkgs.legacyPackages.${system});
+
+    in
+      {
+
+        devShells = forAllSystems (pkgs: with pkgs; {
+          default = mkShell {
+            nativeBuildInputs = [ rustc cargo ];
+          };
+        });
+
+      };
+}
diff --git a/src/bin/day01.rs b/src/bin/day01.rs
new file mode 100644
index 0000000..0c30af0
--- /dev/null
+++ b/src/bin/day01.rs
@@ -0,0 +1,60 @@
+use std::env;
+use std::fs;
+
+use anyhow::{Context, Result};
+
+fn p1(line: &str) -> Option<u32> {
+    let digits = line.chars().filter_map(|a| a.to_digit(10));
+
+    let first = digits.clone().next()?;
+    let last = digits.rev().next()?;
+
+    Some(first * 10 + last)
+}
+
+const DIGIT_NAMES: [&'static str; 9] = [
+    "one", "two", "three", "four", "five", "six", "seven", "eight", "nine",
+];
+
+const REV_DIGIT_NAMES: [&'static str; 9] = [
+    "eno", "owt", "eerht", "ruof", "evif", "xis", "neves", "thgie", "enin",
+];
+
+fn find_first_digit(line: &str, digit_names: &[&'static str; 9]) -> Option<usize> {
+    let digit_char_position = line.as_bytes().iter().position(u8::is_ascii_digit)?;
+
+    let digit_value = usize::from(line.as_bytes()[digit_char_position] - b'0');
+
+    (0..digit_char_position)
+        .find_map(|start| {
+            let sliced = &line[start..];
+            digit_names
+                .into_iter()
+                .position(|&digit_name| sliced.starts_with(digit_name))
+                .map(|v| v + 1)
+        })
+        .or(Some(digit_value))
+}
+
+fn p2(line: &str) -> Option<usize> {
+    let first = find_first_digit(line, &DIGIT_NAMES)?;
+    let rev_line = line.chars().rev().collect::<String>();
+    let last = find_first_digit(rev_line.as_str(), &REV_DIGIT_NAMES)?;
+
+    Some(first * 10 + last)
+}
+
+fn main() -> Result<()> {
+    let filename = env::args()
+        .nth(1)
+        .context("./day01 <path to puzzle input")?;
+    let input = fs::read_to_string(filename)?;
+
+    let ans1: u32 = input.lines().map(|line| p1(line).unwrap()).sum();
+    let ans2: usize = input.lines().map(|line| p2(line).unwrap()).sum();
+
+    println!("1) {}", ans1);
+    println!("2) {}", ans2);
+
+    Ok(())
+}
diff --git a/src/bin/day02.rs b/src/bin/day02.rs
new file mode 100644
index 0000000..4c86eec
--- /dev/null
+++ b/src/bin/day02.rs
@@ -0,0 +1,48 @@
+use std::env;
+use std::fs;
+
+use anyhow::{Context, Result};
+
+const MALFORMED: &str = "malformed input.";
+
+fn main() -> Result<()> {
+    let filename = env::args()
+        .nth(1)
+        .context("./day02 <path to puzzle input>")?;
+    let input = fs::read_to_string(filename)?;
+
+    let mut part1 = 0;
+    let mut part2 = 0;
+
+    for line in input.lines() {
+        let (game_name, game) = line.split_once(": ").context(MALFORMED)?;
+        let game_id: usize = game_name.split_once(' ').context(MALFORMED)?.1.parse()?;
+
+        let mut draw_max = (0u32, 0u32, 0u32);
+
+        for draw in game.split("; ") {
+            for color in draw.split(", ") {
+                let (count_str, color) = color.split_once(' ').context(MALFORMED)?;
+                let count: u32 = count_str.parse()?;
+
+                match color {
+                    "red" => draw_max.0 = draw_max.0.max(count),
+                    "green" => draw_max.1 = draw_max.1.max(count),
+                    "blue" => draw_max.2 = draw_max.2.max(count),
+                    _ => unreachable!(),
+                };
+            }
+        }
+
+        if draw_max.0 <= 12 && draw_max.1 <= 13 && draw_max.2 <= 14 {
+            part1 += game_id
+        }
+
+        part2 += draw_max.0 * draw_max.1 * draw_max.2;
+    }
+
+    println!("1) {}", part1);
+    println!("2) {}", part2);
+
+    Ok(())
+}
diff --git a/src/bin/day03.rs b/src/bin/day03.rs
new file mode 100644
index 0000000..4990f54
--- /dev/null
+++ b/src/bin/day03.rs
@@ -0,0 +1,62 @@
+use std::collections::HashMap;
+use std::env;
+use std::fs;
+
+use regex::bytes::Regex;
+
+use anyhow::{Context, Result};
+
+fn main() -> Result<()> {
+    let filename = env::args()
+        .nth(1)
+        .context("./day03 <path to puzzle input>")?;
+    let input = fs::read_to_string(filename)?;
+    let lines = input
+        .lines()
+        .map(|line| line.as_bytes())
+        .collect::<Vec<_>>();
+
+    let number_re = Regex::new(r"\d+")?;
+
+    let h = lines.len();
+    let w = lines[0].len();
+
+    let is_symbol = |c: u8| !c.is_ascii_digit() && c != b'.';
+
+    let mut part1: usize = 0;
+    let mut gears: HashMap<(usize, usize), Vec<_>> = HashMap::new();
+    for (row, line) in lines.iter().enumerate() {
+        for number_str in number_re.find_iter(line) {
+            let value = std::str::from_utf8(number_str.as_bytes())?.parse::<usize>()?;
+
+            let mut has_symbol_neighbour = false;
+
+            for x in [row.saturating_sub(1), row, row + 1] {
+                for y in number_str.start().saturating_sub(1)..=number_str.end() {
+                    if x < h && y < w {
+                        has_symbol_neighbour |= is_symbol(lines[x][y]);
+
+                        if lines[x][y] == b'*' {
+                            gears.entry((x, y)).or_default().push(value);
+                        }
+                    }
+                }
+            }
+
+            if has_symbol_neighbour {
+                part1 += value;
+            }
+        }
+    }
+
+    let part2: usize = gears
+        .values()
+        .filter(|v| v.len() == 2)
+        .map(|v| v[0] * v[1])
+        .sum();
+
+    println!("1) {}", part1);
+    println!("2) {}", part2);
+
+    Ok(())
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..bee8f89
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,83 @@
+use std::fs;
+
+// fn part2(line: &str) -> (u32, u32) {
+// 	(0, 0)
+// }
+
+// fn part1(line: &str) -> (u32, u32) {
+// 	let mut digits = line.chars()
+// 		.filter_map(|a| a.to_digit(10));
+
+// 	let d1 = digits.next().unwrap();
+
+// 	(d1, digits.last().unwrap_or(d1))
+// }
+
+
+fn possible(line: &str) -> (bool, u32) {
+	let a = line.split(':').collect::<Vec<_>>()[1].trim();
+
+	let mut power = [0, 0, 0];
+
+	let mut possible = true;
+
+	for game in a.split(';') {
+		let game = game.trim();
+		let parts = game.split(',');
+		let mut l = [0,0,0];
+
+		for part in parts {
+			let part = part.trim();
+			let num = part.split(' ').next().unwrap().parse::<u32>().unwrap();
+
+			if part.ends_with("red") {
+				l[0] += num;
+				power[0] = power[0].max(num);
+			} else if part.ends_with("green") {
+				l[1] += num;
+				power[1] = power[1].max(num);
+			} else if part.ends_with ("blue") {
+				l[2] += num;
+				power[2] = power[2].max(num);
+			} else {
+				todo!()
+			}
+		}
+
+		if l[0] > 12 || l[1] > 13 || l[2] > 14 {
+			possible = false;
+		}
+	}
+
+	(true, power[0] * power[1] * power[2])
+}
+
+fn main() {
+	let contents = fs::read_to_string("./data/2.in").expect("");
+	let ans= contents.lines().enumerate().filter(|(_, line)| possible(line).0).map(|(i, _)| i+1).collect::<Vec<_>>();
+
+	let ans2: u32 = contents.lines().map(|line| possible(line).1).sum();
+
+	println!("{:?}", ans2);
+	// let contents = fs::read_to_string("./data/1.in").expect("");
+	// let data = contents.lines().map(|line| {
+	// 	let b = line.to_string()
+	// 		.replace("one", "one1one")
+	// 		.replace("two", "two2two")
+	// 		.replace("three", "three3three")
+	// 		.replace("four", "four4four")
+	// 		.replace("five", "five5five")
+	// 		.replace("six", "six6six")
+	// 		.replace("seven", "seven7seven")
+	// 		.replace("eight", "eight8eight")
+	// 		.replace("nine", "nine9nine");
+
+	// 	let it = b.chars().filter(|a| a.is_digit(10)).collect::<Vec<_>>();
+	// 	(it[0], it[it.len() - 1])
+	// });
+
+
+
+	// let ans: u32 = data.map(|(c1, c2)| c1.to_digit(10).unwrap() * 10 + c2.to_digit(10).unwrap()).sum();
+	// println!("{:?}", ans);
+}