feat: Day 2 done

Day2/P1/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "P1"
+version = "0.1.0"

Day2/P1/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "P1"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

Day2/P1/example

@@ -0,0 +1 @@
+11-22,95-115,998-1012,1188511880-1188511890,222220-222224,1698522-1698528,446443-446449,38593856-38593862,565653-565659,824824821-824824827,2121212118-2121212124

Day2/P1/src/main.rs

@@ -0,0 +1,31 @@
+use std::fs;
+
+fn main() {
+    println!("Day 2P1");
+    let contents = fs::read_to_string("test").expect("input not found");
+    let mut bad_count = 0;
+    for range in contents.split(",") {
+        let mut parts = range.split("-");
+
+        let first_id = parts.next().unwrap();
+        let last_id = parts.next().unwrap().trim();
+
+        bad_count += check_range(first_id, last_id);
+    }
+    print!("Total {bad_count}");
+}
+
+fn check_range(first: &str, last: &str) -> u64 {
+    let first_int: u64 = first.parse().unwrap();
+    let last_int: u64 = last.parse().unwrap();
+    let mut count = 0;
+    for n in first_int..=last_int {
+        let input = n.to_string();
+        let parts = input.split_at(input.len() / 2);
+        if parts.0 == parts.1 {
+            println!("{input} is invalid");
+            count += n;
+        }
+    }
+    count
+}

Day2/P1/test

@@ -0,0 +1 @@
+7777742220-7777814718,3201990-3447830,49-86,653243-683065,91-129,24-41,1-15,2678-4638,1407-2511,221-504,867867-942148,1167452509-1167622686,9957459726-9957683116,379068-535983,757-1242,955118-1088945,297342-362801,548256-566461,4926-10075,736811-799457,1093342-1130060,620410-651225,65610339-65732429,992946118-993033511,5848473-5907215,17190619-17315301,203488-286290,15631-36109,5858509282-5858695889,87824047-87984031,1313113913-1313147594,795745221-795825571,46303-100636,4743038-4844422

Day2/P2_Regex/Cargo.lock

@@ -0,0 +1,81 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "P1"
+version = "0.1.0"
+dependencies = [
+ "fancy-regex",
+ "regex",
+]
+
+[[package]]
+name = "aho-corasick"
+version = "1.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ddd31a130427c27518df266943a5308ed92d4b226cc639f5a8f1002816174301"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "bit-set"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "08807e080ed7f9d5433fa9b275196cfc35414f66a0c79d864dc51a0d825231a3"
+dependencies = [
+ "bit-vec",
+]
+
+[[package]]
+name = "bit-vec"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e764a1d40d510daf35e07be9eb06e75770908c27d411ee6c92109c9840eaaf7"
+
+[[package]]
+name = "fancy-regex"
+version = "0.16.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "998b056554fbe42e03ae0e152895cd1a7e1002aec800fdc6635d20270260c46f"
+dependencies = [
+ "bit-set",
+ "regex-automata",
+ "regex-syntax",
+]
+
+[[package]]
+name = "memchr"
+version = "2.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f52b00d39961fc5b2736ea853c9cc86238e165017a493d1d5c8eac6bdc4cc273"
+
+[[package]]
+name = "regex"
+version = "1.12.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "843bc0191f75f3e22651ae5f1e72939ab2f72a4bc30fa80a066bd66edefc24d4"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-automata",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-automata"
+version = "0.4.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5276caf25ac86c8d810222b3dbb938e512c55c6831a10f3e6ed1c93b84041f1c"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.8.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a2d987857b319362043e95f5353c0535c1f58eec5336fdfcf626430af7def58"

Day2/P2_Regex/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "P2_Regex"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+fancy-regex = "0.16.2"
+regex = "1.12.2"

Day2/P2_Regex/example

@@ -0,0 +1 @@
+11-22,95-115,998-1012,1188511880-1188511890,222220-222224,1698522-1698528,446443-446449,38593856-38593862,565653-565659,824824821-824824827,2121212118-2121212124

Day2/P2_Regex/src/main.rs

@@ -0,0 +1,34 @@
+use std::{fs, sync::LazyLock};
+
+use fancy_regex::Regex;
+
+static PATTERN: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"^(\d+)\1+$").unwrap());
+
+fn main() {
+    println!("Day 2P2");
+    let contents = fs::read_to_string("test").expect("input not found");
+    let mut bad_count = 0;
+    for range in contents.split(",") {
+        let mut parts = range.split("-");
+
+        let first_id = parts.next().unwrap();
+        let last_id = parts.next().unwrap().trim();
+
+        bad_count += check_range(first_id, last_id);
+    }
+    print!("Total {bad_count}");
+}
+
+fn check_range(first: &str, last: &str) -> u64 {
+    let first_int: u64 = first.parse().unwrap();
+    let last_int: u64 = last.parse().unwrap();
+    let mut count = 0;
+    for n in first_int..=last_int {
+        let input = n.to_string();
+        let res = PATTERN.is_match(&input).unwrap();
+        if res {
+            count += n;
+        }
+    }
+    count
+}

Day2/P2_Regex/test

@@ -0,0 +1 @@
+7777742220-7777814718,3201990-3447830,49-86,653243-683065,91-129,24-41,1-15,2678-4638,1407-2511,221-504,867867-942148,1167452509-1167622686,9957459726-9957683116,379068-535983,757-1242,955118-1088945,297342-362801,548256-566461,4926-10075,736811-799457,1093342-1130060,620410-651225,65610339-65732429,992946118-993033511,5848473-5907215,17190619-17315301,203488-286290,15631-36109,5858509282-5858695889,87824047-87984031,1313113913-1313147594,795745221-795825571,46303-100636,4743038-4844422