diff --git a/2/Cargo.lock b/2/Cargo.lock
new file mode 100644
index 0000000..2e7221e
--- /dev/null
+++ b/2/Cargo.lock
@@ -0,0 +1,119 @@
+# 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 = "day2"
+version = "0.1.0"
+dependencies = [
+ "lazy-regex",
+ "regex",
+]
+
+[[package]]
+name = "lazy-regex"
+version = "3.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d12be4595afdf58bd19e4a9f4e24187da2a66700786ff660a418e9059937a4c"
+dependencies = [
+ "lazy-regex-proc_macros",
+ "once_cell",
+ "regex",
+]
+
+[[package]]
+name = "lazy-regex-proc_macros"
+version = "3.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "44bcd58e6c97a7fcbaffcdc95728b393b8d98933bfadad49ed4097845b57ef0b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "regex",
+ "syn",
+]
+
+[[package]]
+name = "memchr"
+version = "2.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f665ee40bc4a3c5590afb1e9677db74a508659dfd71e126420da8274909a0167"
+
+[[package]]
+name = "once_cell"
+version = "1.18.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dd8b5dd2ae5ed71462c540258bedcb51965123ad7e7ccf4b9a8cafaa4a63576d"
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.70"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+dependencies = [
+ "proc-macro2",
+]
+
+[[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"
+
+[[package]]
+name = "syn"
+version = "2.0.39"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
diff --git a/2/Cargo.toml b/2/Cargo.toml
new file mode 100644
index 0000000..bd45c7c
--- /dev/null
+++ b/2/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "day2"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+lazy-regex = "3.1.0"
+regex = "1.10.2"
diff --git a/2/input b/2/input
new file mode 100644
index 0000000..aed79ba
--- /dev/null
+++ b/2/input
@@ -0,0 +1,100 @@
+Game 1: 1 blue; 4 green, 5 blue; 11 red, 3 blue, 11 green; 1 red, 10 green, 4 blue; 17 red, 12 green, 7 blue; 3 blue, 19 green, 15 red
+Game 2: 17 red, 10 green; 3 blue, 17 red, 7 green; 10 green, 1 blue, 10 red; 7 green, 15 red, 1 blue; 7 green, 8 blue, 16 red; 18 red, 5 green, 3 blue
+Game 3: 10 blue, 3 green, 8 red; 15 green, 14 blue, 1 red; 8 blue, 11 red, 2 green; 5 red, 9 green, 6 blue
+Game 4: 1 red, 3 blue; 3 blue, 3 green, 1 red; 11 blue, 2 green; 2 green, 14 blue; 1 green, 7 blue; 11 blue, 5 green
+Game 5: 9 green, 5 red, 10 blue; 9 red, 4 blue, 12 green; 9 green, 6 blue, 14 red; 16 green, 8 red, 6 blue; 11 blue, 13 red, 1 green
+Game 6: 1 blue, 2 green, 16 red; 1 green, 19 red; 1 blue; 3 blue, 2 red, 1 green; 18 red, 2 blue, 1 green
+Game 7: 2 blue, 9 red, 5 green; 11 blue, 6 green, 4 red; 7 red, 3 green, 5 blue; 5 green, 11 blue, 7 red; 17 blue, 4 red, 3 green; 20 blue, 1 green, 2 red
+Game 8: 1 green, 6 red, 4 blue; 8 green, 4 blue, 2 red; 2 blue, 5 green
+Game 9: 1 green, 5 blue; 4 blue; 2 red, 1 blue
+Game 10: 1 green, 12 blue; 6 red, 4 green; 5 green, 14 blue, 9 red; 6 red, 13 blue, 2 green; 6 red, 17 blue, 1 green
+Game 11: 19 green, 1 red; 15 red, 7 green; 1 blue, 8 red, 14 green; 1 blue, 11 green, 1 red
+Game 12: 4 red, 3 green, 12 blue; 4 green, 13 red; 2 green, 15 blue, 5 red; 5 red, 10 blue, 3 green; 3 green, 17 blue, 17 red; 1 red, 4 green, 15 blue
+Game 13: 5 red, 7 blue; 6 red, 1 green, 11 blue; 17 blue, 11 green, 4 red; 6 red, 9 green, 5 blue; 4 green, 14 blue
+Game 14: 6 red, 15 blue, 3 green; 4 green, 4 blue, 3 red; 3 blue, 1 green, 5 red
+Game 15: 4 green, 3 blue, 6 red; 3 blue, 2 red, 4 green; 15 red, 3 green, 4 blue; 11 red, 2 blue, 1 green
+Game 16: 4 green, 1 blue, 12 red; 10 green, 6 blue, 10 red; 1 blue, 2 green, 15 red; 1 green, 3 red, 4 blue
+Game 17: 10 green, 11 blue; 13 green, 10 blue, 3 red; 8 red, 3 green, 10 blue
+Game 18: 3 red; 4 red, 1 blue; 3 green, 3 red; 10 green, 1 blue; 4 red, 6 green, 1 blue; 3 green
+Game 19: 4 red, 6 green; 11 red, 4 blue, 2 green; 4 green, 8 red; 9 red, 7 green, 2 blue; 13 red, 4 blue; 9 red
+Game 20: 2 blue, 1 green, 8 red; 3 green, 11 blue, 1 red; 5 blue, 4 red, 6 green; 6 green, 7 red, 5 blue; 7 red, 2 green, 1 blue
+Game 21: 7 blue, 3 green; 2 green, 2 red, 7 blue; 6 blue, 3 red, 1 green; 9 blue, 1 green, 3 red
+Game 22: 7 red, 5 blue, 9 green; 6 red, 1 blue, 5 green; 18 red, 7 green, 5 blue; 13 red, 11 green, 1 blue; 13 red, 1 blue, 11 green
+Game 23: 10 green, 1 blue, 5 red; 2 red, 4 green; 9 green, 2 red; 10 green, 1 blue, 5 red
+Game 24: 2 red, 6 green, 16 blue; 3 blue, 12 red, 3 green; 6 blue, 4 red, 12 green; 12 green, 14 blue, 3 red
+Game 25: 5 red, 2 blue, 1 green; 4 blue, 14 red, 2 green; 16 blue, 4 red; 5 red; 12 blue, 16 red; 2 red, 6 blue, 1 green
+Game 26: 10 blue, 6 green, 5 red; 2 red, 2 green; 8 blue, 5 red; 7 blue, 11 green; 8 green, 9 blue
+Game 27: 1 red, 2 green; 6 green, 10 blue; 1 red, 6 green, 11 blue; 4 blue, 1 green, 1 red; 1 red, 7 blue; 5 green, 2 blue, 1 red
+Game 28: 6 blue, 5 red, 3 green; 5 blue, 1 green; 1 green, 8 red, 1 blue; 2 blue, 4 green; 4 red, 5 blue
+Game 29: 2 red, 4 green, 6 blue; 6 blue, 2 green, 1 red; 10 green, 13 blue, 2 red; 11 green, 11 blue, 2 red; 5 red, 10 green
+Game 30: 4 green, 4 blue, 5 red; 6 red, 18 green, 7 blue; 1 red, 11 green, 2 blue; 11 red, 2 blue, 1 green
+Game 31: 1 red, 7 green, 2 blue; 5 red, 6 green, 9 blue; 3 green, 1 red, 9 blue; 3 red; 8 blue, 6 green, 1 red; 14 blue, 4 green, 7 red
+Game 32: 11 red, 2 blue, 2 green; 18 blue, 1 green; 6 blue, 1 green, 15 red; 4 red, 2 green; 13 red, 6 green, 5 blue; 7 blue, 5 green
+Game 33: 12 blue, 2 red, 2 green; 5 blue, 3 green; 2 green, 6 red, 4 blue; 12 blue, 13 red; 10 blue, 12 red, 1 green; 4 blue, 4 red
+Game 34: 2 blue, 1 red, 6 green; 2 blue, 1 green; 1 red, 2 green, 2 blue; 17 red, 1 blue, 2 green; 4 green, 2 red
+Game 35: 2 blue, 12 red, 2 green; 2 green, 8 red, 11 blue; 17 red, 16 blue; 8 blue, 8 red; 1 green, 6 red, 9 blue
+Game 36: 6 red, 14 green, 7 blue; 1 green, 1 red, 6 blue; 9 red, 10 blue, 9 green; 11 blue, 14 green, 8 red; 10 red, 6 green, 3 blue
+Game 37: 6 green; 2 red, 5 green; 4 blue, 4 red, 5 green; 1 red, 7 green, 4 blue
+Game 38: 1 green, 8 red, 10 blue; 3 green, 5 red, 12 blue; 13 blue, 5 red, 1 green; 3 green, 1 red; 3 red, 15 blue, 6 green; 3 green, 6 red, 4 blue
+Game 39: 15 green, 3 blue; 3 green; 3 blue, 3 red, 8 green; 4 blue, 10 green, 4 red; 2 green, 5 blue, 4 red; 3 green, 3 blue, 1 red
+Game 40: 2 red, 3 green, 15 blue; 5 blue, 13 green, 2 red; 11 blue, 1 red; 5 blue, 20 green, 5 red
+Game 41: 1 red, 2 green, 1 blue; 10 red; 11 green, 1 blue, 5 red; 10 red, 13 green
+Game 42: 10 red, 8 green, 2 blue; 5 green, 4 red; 6 red; 5 red, 9 green, 2 blue; 2 blue, 2 red, 3 green; 1 blue, 7 red, 2 green
+Game 43: 8 red, 6 blue, 12 green; 11 green, 2 red, 2 blue; 4 blue, 3 red, 8 green; 14 red, 3 blue; 9 green, 1 blue, 5 red
+Game 44: 4 red, 5 blue, 4 green; 9 blue, 1 green; 10 green, 2 blue, 4 red; 5 red, 15 green, 12 blue
+Game 45: 1 red, 2 green; 5 blue; 3 blue, 1 red; 1 blue; 4 green, 1 red
+Game 46: 3 green, 8 red, 5 blue; 1 blue, 10 red, 5 green; 2 green, 5 red, 3 blue; 5 green, 4 red, 13 blue
+Game 47: 2 green, 1 blue; 2 red, 2 green, 6 blue; 1 green, 1 red, 1 blue; 2 green, 4 blue, 4 red; 2 green, 6 blue, 3 red
+Game 48: 4 blue, 1 green, 2 red; 6 blue, 1 red; 4 blue
+Game 49: 16 blue, 18 green, 13 red; 7 red, 13 blue; 14 green, 12 red; 20 green, 14 red, 12 blue
+Game 50: 8 blue, 2 red, 1 green; 4 red, 2 green, 5 blue; 6 blue, 2 green; 8 blue, 3 green, 5 red; 1 green, 4 blue
+Game 51: 2 blue, 8 red; 2 green, 3 red, 2 blue; 12 green; 3 blue, 10 green, 1 red; 13 green, 3 blue, 5 red
+Game 52: 12 blue, 5 red, 16 green; 4 blue, 13 green; 2 red, 5 blue, 5 green; 4 green, 8 blue, 3 red
+Game 53: 7 blue, 5 green; 8 green, 8 blue; 4 red, 1 green; 8 blue, 5 red, 11 green
+Game 54: 4 blue, 3 green, 1 red; 10 green, 4 red, 7 blue; 1 red, 6 blue, 2 green
+Game 55: 2 red, 10 blue; 13 red, 10 blue; 4 red, 5 blue, 4 green; 3 green, 8 blue; 5 blue, 7 red, 2 green
+Game 56: 6 green, 7 blue, 9 red; 3 blue, 4 green; 15 red, 3 blue, 3 green; 5 red, 8 green, 7 blue
+Game 57: 9 red, 13 blue, 2 green; 3 red, 2 green, 3 blue; 1 blue, 5 red, 3 green; 9 blue, 2 green, 2 red; 3 red, 12 blue, 3 green; 2 green, 7 red
+Game 58: 4 blue, 7 red; 2 blue, 5 green, 1 red; 17 blue, 3 red; 5 green, 1 blue, 4 red; 4 green, 14 blue, 3 red
+Game 59: 5 blue, 4 red; 7 red; 4 blue, 4 red, 1 green; 1 green, 1 blue, 5 red
+Game 60: 4 red, 2 green; 1 green, 2 blue; 2 red, 2 green; 4 red, 2 green; 3 red
+Game 61: 6 red, 14 green; 12 green, 3 blue; 3 blue, 16 green, 11 red
+Game 62: 12 green, 2 red, 1 blue; 14 red, 2 blue, 4 green; 7 red, 5 green, 1 blue; 4 green, 14 red, 1 blue; 2 blue, 7 green, 3 red; 14 red, 9 green, 2 blue
+Game 63: 1 red, 8 blue, 12 green; 3 green, 10 blue, 4 red; 2 red, 1 blue, 2 green; 2 red, 8 green; 4 red, 3 blue, 9 green; 13 green, 4 blue
+Game 64: 4 blue, 9 green, 4 red; 10 green, 6 blue, 7 red; 10 green, 8 red, 1 blue; 13 blue, 8 green, 8 red; 4 green, 1 red, 8 blue
+Game 65: 16 blue, 5 red, 13 green; 5 red, 9 green, 10 blue; 2 green, 14 red; 6 red, 5 green, 5 blue; 19 blue, 4 green, 14 red; 7 red, 1 blue, 4 green
+Game 66: 7 blue, 11 green, 5 red; 7 green, 8 red, 10 blue; 3 red, 1 green
+Game 67: 9 green, 2 blue, 13 red; 11 red, 10 blue; 14 red, 1 green, 1 blue; 1 red, 13 green, 6 blue; 7 blue, 3 green, 5 red; 3 green, 2 blue
+Game 68: 6 green, 2 blue; 1 blue, 3 red, 5 green; 1 blue, 10 green
+Game 69: 4 red, 6 blue, 1 green; 6 blue, 2 red, 4 green; 9 green, 7 blue, 2 red
+Game 70: 11 blue, 1 green, 4 red; 7 blue, 1 green; 6 red, 9 blue; 1 green, 3 red, 7 blue; 1 green, 9 blue, 2 red
+Game 71: 2 green, 6 red; 1 blue, 2 green, 15 red; 6 red, 1 blue; 2 green, 5 red
+Game 72: 5 green, 6 red; 8 red, 1 blue, 12 green; 1 blue, 9 red, 15 green; 11 green, 1 blue, 6 red; 14 green, 5 red
+Game 73: 9 green, 13 red, 1 blue; 14 green, 5 blue, 13 red; 13 green, 10 red, 16 blue; 3 blue, 7 red, 1 green; 7 red, 6 green, 11 blue
+Game 74: 1 blue, 9 red, 15 green; 3 blue, 7 green; 9 green, 1 blue, 7 red
+Game 75: 5 blue, 12 red, 2 green; 2 blue, 2 green; 4 green, 2 red, 7 blue; 4 green, 7 blue, 5 red; 1 green, 7 blue, 3 red
+Game 76: 1 blue; 8 red, 13 blue; 4 green, 7 blue, 7 red; 3 red, 12 blue, 2 green; 2 green, 2 blue, 1 red
+Game 77: 4 blue; 4 blue; 1 blue, 1 red; 1 red, 5 blue; 10 blue, 1 green
+Game 78: 3 blue, 10 green, 6 red; 12 red, 7 blue, 8 green; 2 green, 18 red, 5 blue; 2 red, 15 blue, 14 green; 4 green, 6 blue, 13 red
+Game 79: 7 red, 1 green; 1 blue, 6 red, 2 green; 1 blue, 12 red
+Game 80: 4 red, 6 blue, 2 green; 5 blue, 2 red; 6 blue, 7 red, 2 green
+Game 81: 2 green, 9 red; 2 green, 2 blue, 7 red; 12 red, 7 green; 8 green, 3 red, 3 blue
+Game 82: 4 green, 5 blue; 2 red, 16 blue; 2 red, 2 green, 18 blue
+Game 83: 14 red, 2 green; 3 blue, 16 red, 2 green; 4 green, 13 red, 1 blue
+Game 84: 10 green, 6 blue, 2 red; 5 red, 6 blue; 7 green, 6 red, 9 blue
+Game 85: 1 red; 12 red, 1 blue, 2 green; 6 red, 1 green; 12 red, 2 green
+Game 86: 14 red, 1 green, 3 blue; 3 blue; 4 green, 8 red, 2 blue; 10 red, 2 green
+Game 87: 4 red, 9 green, 8 blue; 3 green, 6 blue, 7 red; 4 blue, 1 red; 2 red, 7 blue, 11 green; 8 green, 2 blue, 5 red; 6 blue, 10 green, 8 red
+Game 88: 1 green, 1 red; 2 green, 1 blue; 3 green, 1 red, 1 blue; 4 green; 1 blue, 3 green, 1 red
+Game 89: 11 green, 7 blue, 8 red; 7 blue, 3 green, 2 red; 7 green, 6 red, 4 blue; 1 blue, 2 green, 10 red; 3 red, 2 blue, 1 green
+Game 90: 10 green, 12 red, 2 blue; 7 red, 7 blue, 8 green; 2 blue, 11 red, 7 green; 6 green, 5 red, 2 blue; 7 red, 10 green
+Game 91: 12 red, 8 green; 8 red, 6 green, 3 blue; 12 red, 4 blue, 2 green
+Game 92: 10 blue, 3 green; 4 red, 13 blue, 8 green; 7 green, 8 blue, 7 red
+Game 93: 7 red, 4 green, 1 blue; 15 green, 4 red; 2 blue, 15 red
+Game 94: 10 red, 10 green, 11 blue; 3 red, 1 green, 7 blue; 9 red, 4 green, 9 blue; 7 red, 9 green, 13 blue; 9 blue, 2 green, 10 red
+Game 95: 4 blue, 12 green; 7 green, 1 red, 5 blue; 2 blue, 8 green, 8 red
+Game 96: 12 green, 2 blue; 11 green, 3 blue; 3 red, 2 green, 5 blue; 12 green, 2 blue, 4 red; 2 blue, 1 green, 1 red; 3 red, 11 green, 3 blue
+Game 97: 6 red, 3 blue, 1 green; 1 blue, 2 red, 14 green; 4 blue, 14 green
+Game 98: 13 green, 1 red, 5 blue; 2 red, 5 green, 7 blue; 19 green, 5 blue; 4 blue, 13 green; 5 green, 8 blue
+Game 99: 11 red, 8 green; 16 red, 10 green; 9 red, 6 green; 3 blue, 2 red, 4 green
+Game 100: 4 red, 2 blue, 4 green; 2 green, 1 red, 1 blue; 3 green, 4 blue, 5 red; 18 red, 2 blue; 9 red, 5 green, 4 blue
diff --git a/2/src/main.rs b/2/src/main.rs
new file mode 100644
index 0000000..60b241e
--- /dev/null
+++ b/2/src/main.rs
@@ -0,0 +1,170 @@
+use std::fs::File;
+use std::io::{BufRead, BufReader, Lines};
+
+use lazy_regex::{lazy_regex, Lazy};
+use regex::Regex;
+
+// --- Day 2: Cube Conundrum ---
+
+// You're launched high into the atmosphere! The apex of your trajectory just barely
+// reaches the surface of a large island floating in the sky. You gently land in a
+// fluffy pile of leaves. It's quite cold, but you don't see much snow. An Elf runs over
+// to greet you.
+
+// The Elf explains that you've arrived at Snow Island and apologizes for the lack of
+// snow. He'll be happy to explain the situation, but it's a bit of a walk, so you have
+// some time. They don't get many visitors up here; would you like to play a game in the
+// meantime?
+
+// As you walk, the Elf shows you a small bag and some cubes which are either red,
+// green, or blue. Each time you play this game, he will hide a secret number of cubes
+// of each color in the bag, and your goal is to figure out information about the number
+// of cubes.
+
+// To get information, once a bag has been loaded with cubes, the Elf will reach into
+// the bag, grab a handful of random cubes, show them to you, and then put them back in
+// the bag. He'll do this a few times per game.
+
+// You play several games and record the information from each game (your puzzle input).
+// Each game is listed with its ID number (like the 11 in Game 11: ...) followed by a
+// semicolon-separated list of subsets of cubes that were revealed from the bag (like 3
+// red, 5 green, 4 blue).
+
+// For example, the record of a few games might look like this:
+
+// 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
+
+// In game 1, three sets of cubes are revealed from the bag (and then put back again).
+// The first set is 3 blue cubes and 4 red cubes; the second set is 1 red cube, 2 green
+// cubes, and 6 blue cubes; the third set is only 2 green cubes.
+
+// BOILERPLATE
+type InputIter = Lines<BufReader<File>>;
+
+fn get_input() -> InputIter {
+    let f = File::open("input").unwrap();
+    let br = BufReader::new(f);
+    br.lines()
+}
+
+fn main() {
+    println!("Problem 1 solution: {}", problem1(get_input()));
+    println!("Problem 2 solution: {}", problem2(get_input()));
+}
+
+// PARSING
+
+struct CubeCount {
+    blue: u64,
+    red: u64,
+    green: u64,
+}
+
+impl Default for CubeCount {
+    fn default() -> Self {
+        Self {
+            blue: 0,
+            red: 0,
+            green: 0,
+        }
+    }
+}
+
+impl From<&str> for CubeCount {
+    fn from(s: &str) -> Self {
+        let mut result = Self::default();
+        let counts = s.split(", ");
+        for count in counts {
+            let (n, color) = count.split_once(' ').unwrap();
+            match color {
+                "blue" => result.blue = n.parse().unwrap(),
+                "red" => result.red = n.parse().unwrap(),
+                "green" => result.green = n.parse().unwrap(),
+                _ => panic!("bad colour {}", color),
+            }
+        }
+
+        result
+    }
+}
+
+pub static GAME_ID_REGEX: Lazy<Regex> = lazy_regex!(r"^Game ([0-9]+)");
+
+struct GameResult {
+    id: u64,
+    results: Vec<CubeCount>,
+}
+
+impl From<&str> for GameResult {
+    fn from(s: &str) -> Self {
+        let mut results = Vec::new();
+        let (s_id, rest) = s.split_once(": ").unwrap();
+        let id: u64 = GAME_ID_REGEX
+            .captures(s_id)
+            .unwrap()
+            .get(1)
+            .unwrap()
+            .as_str()
+            .parse()
+            .unwrap();
+
+        let s_results = rest.split("; ");
+
+        for s_result in s_results {
+            results.push(CubeCount::from(s_result));
+        }
+
+        GameResult { id, results }
+    }
+}
+
+// PROBLEM 1 solution
+
+// The Elf would first like to know which games would have been possible if the bag
+// contained only 12 red cubes, 13 green cubes, and 14 blue cubes?
+
+// In the example above, games 1, 2, and 5 would have been possible if the bag had been
+// loaded with that configuration. However, game 3 would have been impossible because at
+// one point the Elf showed you 20 red cubes at once; similarly, game 4 would also have
+// been impossible because the Elf showed you 15 blue cubes at once. If you add up the
+// IDs of the games that would have been possible, you get 8.
+
+// Determine which games would have been possible if the bag had been loaded with only
+// 12 red cubes, 13 green cubes, and 14 blue cubes. What is the sum of the IDs of those
+// games?
+
+// possible criteria: 12 red cubes, 13 green cubes, and 14 blue cubes
+
+const PROBLEM1_MINIMUM: CubeCount = CubeCount {
+    red: 12,
+    green: 13,
+    blue: 14,
+};
+
+fn problem1_result_possible(game: &GameResult) -> bool {
+    !game.results.iter().any(|result| {
+        result.red > PROBLEM1_MINIMUM.red
+            || result.green > PROBLEM1_MINIMUM.green
+            || result.blue > PROBLEM1_MINIMUM.blue
+    })
+}
+
+fn problem1(input: InputIter) -> u64 {
+    let mut n = 0u64;
+    for line in input {
+        let game_result = GameResult::from(line.unwrap().as_str());
+        if problem1_result_possible(&game_result) {
+            n += game_result.id;
+        }
+    }
+
+    n
+}
+
+// PROBLEM 2 solution
+fn problem2(input: InputIter) -> u64 {
+    0
+}