From 01c6b2cb42a4144a573ec43e9e25c6718741a272 Mon Sep 17 00:00:00 2001
From: omagdy <omar.professional8777@gmail.com>
Date: Sun, 8 Dec 2024 15:28:08 +0200
Subject: Some solutions to AOC 2020

---
 2020/Rust/Cargo.lock       |   96 ++++
 2020/Rust/Cargo.toml       |   78 ++++
 2020/Rust/input/day_1.prod |  200 ++++++++
 2020/Rust/input/day_1.test |    6 +
 2020/Rust/input/day_2.prod | 1000 ++++++++++++++++++++++++++++++++++++++++
 2020/Rust/input/day_2.test |    3 +
 2020/Rust/input/day_4.prod | 1102 ++++++++++++++++++++++++++++++++++++++++++++
 2020/Rust/input/day_4.test |   13 +
 2020/Rust/src/day1.rs      |   47 ++
 2020/Rust/src/day2.rs      |   64 +++
 2020/Rust/src/day4.rs      |   94 ++++
 2020/Rust/src/day5.rs      |  174 +++++++
 12 files changed, 2877 insertions(+)
 create mode 100755 2020/Rust/Cargo.lock
 create mode 100755 2020/Rust/Cargo.toml
 create mode 100644 2020/Rust/input/day_1.prod
 create mode 100644 2020/Rust/input/day_1.test
 create mode 100644 2020/Rust/input/day_2.prod
 create mode 100644 2020/Rust/input/day_2.test
 create mode 100644 2020/Rust/input/day_4.prod
 create mode 100644 2020/Rust/input/day_4.test
 create mode 100755 2020/Rust/src/day1.rs
 create mode 100755 2020/Rust/src/day2.rs
 create mode 100755 2020/Rust/src/day4.rs
 create mode 100644 2020/Rust/src/day5.rs

(limited to '2020')

diff --git a/2020/Rust/Cargo.lock b/2020/Rust/Cargo.lock
new file mode 100755
index 0000000..e9cb66a
--- /dev/null
+++ b/2020/Rust/Cargo.lock
@@ -0,0 +1,96 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "Rust"
+version = "0.1.0"
+dependencies = [
+ "rayon",
+]
+
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "crossbeam-deque"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce6fd6f855243022dcecf8702fef0c297d4338e226845fe067f6341ad9fa0cef"
+dependencies = [
+ "cfg-if",
+ "crossbeam-epoch",
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-epoch"
+version = "0.9.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ae211234986c545741a7dc064309f67ee1e5ad243d0e48335adc0484d960bcc7"
+dependencies = [
+ "autocfg",
+ "cfg-if",
+ "crossbeam-utils",
+ "memoffset",
+ "scopeguard",
+]
+
+[[package]]
+name = "crossbeam-utils"
+version = "0.8.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a22b2d63d4d1dc0b7f1b6b2747dd0088008a9be28b6ddf0b1e7d335e3037294"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "either"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a26ae43d7bcc3b814de94796a5e736d4029efb0ee900c12e2d54c993ad1a1e07"
+
+[[package]]
+name = "memoffset"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a634b1c61a95585bd15607c6ab0c4e5b226e695ff2800ba0cdccddf208c406c"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "rayon"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c27db03db7734835b3f53954b534c91069375ce6ccaa2e065441e07d9b6cdb1"
+dependencies = [
+ "either",
+ "rayon-core",
+]
+
+[[package]]
+name = "rayon-core"
+version = "1.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5ce3fb6ad83f861aac485e76e1985cd109d9a3713802152be56c3b1f0e0658ed"
+dependencies = [
+ "crossbeam-deque",
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "scopeguard"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
diff --git a/2020/Rust/Cargo.toml b/2020/Rust/Cargo.toml
new file mode 100755
index 0000000..5595980
--- /dev/null
+++ b/2020/Rust/Cargo.toml
@@ -0,0 +1,78 @@
+[package]
+name = "Rust"
+version = "0.1.0"
+edition = "2021"
+
+
+[[bin]]
+name = "day1"
+path = "src/day1.rs"
+
+[[bin]]
+name = "day2"
+path = "src/day2.rs"
+
+[[bin]]
+name = "day3"
+path = "src/day3.rs"
+
+[[bin]]
+name = "day4"
+path = "src/day4.rs"
+
+[[bin]]
+name = "day5"
+path = "src/day5.rs"
+
+[[bin]]
+name = "day6"
+path = "src/day6.rs"
+
+[[bin]]
+name = "day7"
+path = "src/day7.rs"
+
+[[bin]]
+name = "day8"
+path = "src/day8.rs"
+
+[[bin]]
+name = "day9"
+path = "src/day9.rs"
+
+[[bin]]
+name = "day10"
+path = "src/day10.rs"
+
+[[bin]]
+name = "day11"
+path = "src/day11.rs"
+
+[[bin]]
+name = "day12"
+path = "src/day12.rs"
+
+[[bin]]
+name = "day13"
+path = "src/day13.rs"
+
+[[bin]]
+name = "day14"
+path = "src/day14.rs"
+
+[[bin]]
+name = "day15"
+path = "src/day15.rs"
+
+[[bin]]
+name = "day16"
+path = "src/day16.rs"
+
+[[bin]]
+name = "day17"
+path = "src/day17.rs"
+
+[dependencies]
+rayon = "1.8.0"
+
+
diff --git a/2020/Rust/input/day_1.prod b/2020/Rust/input/day_1.prod
new file mode 100644
index 0000000..4b0b53c
--- /dev/null
+++ b/2020/Rust/input/day_1.prod
@@ -0,0 +1,200 @@
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diff --git a/2020/Rust/input/day_1.test b/2020/Rust/input/day_1.test
new file mode 100644
index 0000000..e3fb011
--- /dev/null
+++ b/2020/Rust/input/day_1.test
@@ -0,0 +1,6 @@
+1721
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diff --git a/2020/Rust/input/day_2.prod b/2020/Rust/input/day_2.prod
new file mode 100644
index 0000000..8903fa4
--- /dev/null
+++ b/2020/Rust/input/day_2.prod
@@ -0,0 +1,1000 @@
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diff --git a/2020/Rust/input/day_2.test b/2020/Rust/input/day_2.test
new file mode 100644
index 0000000..fe19c03
--- /dev/null
+++ b/2020/Rust/input/day_2.test
@@ -0,0 +1,3 @@
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diff --git a/2020/Rust/input/day_4.prod b/2020/Rust/input/day_4.prod
new file mode 100644
index 0000000..3609690
--- /dev/null
+++ b/2020/Rust/input/day_4.prod
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diff --git a/2020/Rust/input/day_4.test b/2020/Rust/input/day_4.test
new file mode 100644
index 0000000..0ff208e
--- /dev/null
+++ b/2020/Rust/input/day_4.test
@@ -0,0 +1,13 @@
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+ecl:brn pid:760753108 byr:1931
+hgt:179cm
+
+hcl:#cfa07d eyr:2025 pid:166559648
+iyr:2011 ecl:brn hgt:59in
diff --git a/2020/Rust/src/day1.rs b/2020/Rust/src/day1.rs
new file mode 100755
index 0000000..9a84dd4
--- /dev/null
+++ b/2020/Rust/src/day1.rs
@@ -0,0 +1,47 @@
+use std::collections::HashSet;
+
+fn solve_part_one(input: &str) -> i32 {
+    let mut seen = HashSet::new();
+    let numbers: Vec<i32> = input
+        .lines()
+        .map(|line| line.trim().parse().unwrap())
+        .collect();
+
+    for &number in &numbers {
+        let complement = 2020 - number;
+        if seen.contains(&complement) {
+            return number * complement;
+        }
+        seen.insert(number);
+    }
+    panic!("No two numbers sum to 2020!");
+}
+
+fn solve_part_two(input: &str) -> i32 {
+    let numbers: Vec<i32> = input
+        .lines()
+        .map(|line| line.trim().parse().unwrap())
+        .collect();
+
+    for (i, &first) in numbers.iter().enumerate() {
+        let mut seen = HashSet::new();
+        let target_sum = 2020 - first;
+        for &second in &numbers[i + 1..] {
+            let complement = target_sum - second;
+            if seen.contains(&complement) {
+                return first * second * complement;
+            }
+            seen.insert(second);
+        }
+    }
+    panic!("No three numbers sum to 2020!");
+}
+
+fn main() {
+    let test = include_str!("../input/day_1.test");
+    let prod = include_str!("../input/day_1.prod");
+    println!("Test_1: {}", solve_part_one(test));
+    println!("Prod_1: {}", solve_part_one(prod));
+    println!("Test_2: {}", solve_part_two(test));
+    println!("Prod_2: {}", solve_part_two(prod));
+}
diff --git a/2020/Rust/src/day2.rs b/2020/Rust/src/day2.rs
new file mode 100755
index 0000000..4785b3f
--- /dev/null
+++ b/2020/Rust/src/day2.rs
@@ -0,0 +1,64 @@
+struct Policy {
+    min: u32,
+    max: u32,
+    letter: char,
+    password: String,
+}
+
+impl From<&str> for Policy {
+    fn from(value: &str) -> Self {
+        let (left, right) = value.split_once(':').unwrap();
+        let (range, letter) = left.split_once(' ').unwrap();
+        let (min, max) = range.split_once("-").unwrap();
+        let password = right.trim_start().to_string();
+
+        Policy {
+            min: min.parse::<u32>().unwrap(),
+            max: max.parse::<u32>().unwrap(),
+            letter: letter.chars().next().unwrap(),
+            password,
+        }
+    }
+}
+
+fn check_policy(policy: &Policy) -> bool {
+    let count = policy.password.matches(policy.letter).count() as u32;
+    count >= policy.min && count <= policy.max
+}
+
+fn check_policy_part_two(policy: &Policy) -> bool {
+    let mut count = 0;
+    let policy_password = policy.password.as_bytes();
+    if policy_password[(policy.min - 1) as usize] == policy.letter as u8 {
+        count += 1;
+    }
+    if policy_password[(policy.max - 1) as usize] == policy.letter as u8 {
+        count += 1;
+    }
+    count == 1
+}
+
+fn solve_part_one(input: &str) -> usize {
+    input
+        .lines()
+        .map(|line| Policy::from(line))
+        .filter(|policy| check_policy(policy))
+        .count()
+}
+
+fn solve_part_two(input: &str) -> usize {
+    input
+        .lines()
+        .map(|line| Policy::from(line))
+        .filter(|policy| check_policy_part_two(policy))
+        .count()
+}
+
+fn main() {
+    let test = include_str!("../input/day_2.test");
+    let prod = include_str!("../input/day_2.prod");
+    println!("Test_1: {}", solve_part_one(test));
+    println!("Prod_1: {}", solve_part_one(prod));
+    println!("Test_2: {}", solve_part_two(test));
+    println!("Prod_2: {}", solve_part_two(prod));
+}
diff --git a/2020/Rust/src/day4.rs b/2020/Rust/src/day4.rs
new file mode 100755
index 0000000..113e838
--- /dev/null
+++ b/2020/Rust/src/day4.rs
@@ -0,0 +1,94 @@
+#[derive(Debug)]
+struct Passport {
+    byr: Option<usize>,
+    iyr: Option<usize>,
+    eyr: Option<usize>,
+    hgt: Option<usize>,
+    hcl: Option<String>,
+    ecl: Option<String>,
+    pid: Option<String>,
+    cid: Option<usize>,
+}
+
+impl Passport {
+    fn new() -> Self {
+        Self {
+            byr: None,
+            iyr: None,
+            eyr: None,
+            hgt: None,
+            hcl: None,
+            ecl: None,
+            pid: None,
+            cid: None,
+        }
+    }
+}
+
+impl From<&str> for Passport {
+    fn from(value: &str) -> Self {
+        let mut passport = Passport::new();
+        let v = value.replace("\n", " ");
+        let v: Vec<&str> = v.split(" ").collect();
+        for ele in v {
+            if ele.is_empty() {
+                continue;
+            }
+            let (key, value) = ele.split_once(':').unwrap();
+            match key {
+                "byr" => passport.byr = Some(value.parse::<usize>().unwrap()),
+                "iyr" => passport.iyr = Some(value.parse::<usize>().unwrap()),
+                "eyr" => passport.eyr = Some(value.parse::<usize>().unwrap()),
+                "hgt" => {
+                    passport.hgt = Some(
+                        value
+                            .trim_end_matches(|c| c == 'c' || c == 'm' || c == 'i' || c == 'n')
+                            .parse::<usize>()
+                            .unwrap(),
+                    )
+                }
+                "hcl" => passport.hcl = Some(value.to_string()),
+                "ecl" => passport.ecl = Some(value.to_string()),
+                "pid" => passport.pid = Some(value.to_string()),
+                "cid" => passport.cid = Some(value.parse::<usize>().unwrap()),
+                _ => unreachable!(),
+            }
+        }
+        passport
+    }
+}
+
+fn solve_part_one(input: &str) -> usize {
+    let mut cnt: usize = 0;
+    let passports: Vec<Passport> = input
+        .split("\n\n")
+        .map(|pass| Passport::from(pass))
+        .collect();
+    for passport in passports {
+        if passport.byr == None
+            || passport.iyr == None
+            || passport.eyr == None
+            || passport.hgt == None
+            || passport.hcl == None
+            || passport.ecl == None
+            || passport.pid == None
+        {
+            continue;
+        }
+        cnt += 1;
+    }
+    cnt
+}
+
+fn solve_part_two(input: &str) -> usize {
+    todo!()
+}
+
+fn main() {
+    let test = include_str!("../input/day_4.test");
+    let prod = include_str!("../input/day_4.prod");
+    println!("Test_1: {}", solve_part_one(test));
+    println!("Prod_1: {}", solve_part_one(prod));
+    // println!("Test_2: {}", solve_part_two(test));
+    // println!("Prod_2: {}", solve_part_two(prod));
+}
diff --git a/2020/Rust/src/day5.rs b/2020/Rust/src/day5.rs
new file mode 100644
index 0000000..ad48295
--- /dev/null
+++ b/2020/Rust/src/day5.rs
@@ -0,0 +1,174 @@
+use std::{
+    fs::{self, File},
+    io::{self, BufRead, BufReader, Write},
+    sync::{Arc, Mutex},
+    thread,
+};
+
+#[derive(Debug, Clone)]
+enum TaskStatus {
+    Pending,
+    Completed,
+}
+
+#[derive(Debug, Clone)]
+struct Task {
+    id: usize,
+    description: String,
+    status: TaskStatus,
+}
+
+impl Task {
+    fn new(id: usize, description: String) -> Self {
+        Self {
+            id,
+            description,
+            status: TaskStatus::Pending,
+        }
+    }
+
+    fn mark_done(&mut self) {
+        self.status = TaskStatus::Completed;
+    }
+
+    fn to_string(&self) -> String {
+        format!(
+            "{}|{}|{}",
+            self.id,
+            self.description,
+            match self.status {
+                TaskStatus::Pending => "Pending",
+                TaskStatus::Completed => "Completed",
+            }
+        )
+    }
+
+    fn from_string(data: &str) -> Option<Self> {
+        let parts: Vec<&str> = data.split('|').collect();
+        if parts.len() != 3 {
+            return None;
+        }
+        let id = parts[0].parse().ok()?;
+        let description = parts[1].to_string();
+        let status = match parts[2] {
+            "Pending" => TaskStatus::Pending,
+            "Completed" => TaskStatus::Completed,
+            _ => return None,
+        };
+
+        Some(Self {
+            id,
+            description,
+            status,
+        })
+    }
+}
+
+#[derive(Debug)]
+struct TaskManager {
+    tasks: Vec<Task>,
+}
+
+impl TaskManager {
+    fn new() -> Self {
+        Self { tasks: vec![] }
+    }
+
+    fn add_task(&mut self, description: String) {
+        let id = self.tasks.len() + 1;
+        let task = Task::new(id, description);
+        self.tasks.push(task);
+    }
+
+    fn mark_task_done(&mut self, id: usize) -> Result<(), String> {
+        match self.tasks.iter_mut().find(|t| t.id == id) {
+            Some(task) => {
+                task.mark_done();
+                Ok(())
+            }
+            None => Err(format!("Task with ID {} not found.", id)),
+        }
+    }
+
+    fn list_tasks(&self) {
+        for task in &self.tasks {
+            println!(
+                "ID: {}, Description: {}, Status: {:?}",
+                task.id, task.description, task.status
+            );
+        }
+    }
+
+    fn save_to_file(&self, filename: &str) -> io::Result<()> {
+        let mut file = File::create(filename)?;
+        for task in &self.tasks {
+            writeln!(file, "{}", task.to_string())?;
+        }
+        Ok(())
+    }
+
+    fn load_from_file(&mut self, filename: &str) -> io::Result<()> {
+        self.tasks.clear();
+        let file = File::open(filename)?;
+        let reader = BufReader::new(file);
+        for line in reader.lines() {
+            if let Ok(line) = line {
+                if let Some(task) = Task::from_string(&line) {
+                    self.tasks.push(task);
+                }
+            }
+        }
+        Ok(())
+    }
+}
+
+fn add(x: i32, y: i32, z: i32) -> i32 {
+    x + y + z
+}
+
+fn main() {
+    let task_manager = Arc::new(Mutex::new(TaskManager::new()));
+
+    let xay = 5;
+    let yay = 6;
+    let x = xay + yay + add(xay, yay, 3);
+    let y = 2;
+
+    // let z = add(x, y);
+
+    let tm_clone = Arc::clone(&task_manager);
+    println!(
+        "tm_clone: {:?}, Arc::clone(&task_manager): {:?}",
+        tm_clone,
+        Arc::clone(&task_manager)
+    );
+    thread::spawn(move || {
+        let mut tm = tm_clone.lock().unwrap();
+        tm.add_task("Learn Rust".to_string());
+        tm.add_task("Build a project".to_string());
+        tm.list_tasks();
+    })
+    .join()
+    .unwrap();
+
+    let tm_clone = Arc::clone(&task_manager);
+    thread::spawn(move || {
+        let mut tm = tm_clone.lock().unwrap();
+        tm.mark_task_done(1)
+            .unwrap_or_else(|err| println!("{}", err));
+        tm.list_tasks();
+    })
+    .join()
+    .unwrap();
+
+    let tm_clone = Arc::clone(&task_manager);
+    thread::spawn(move || {
+        let mut tm = tm_clone.lock().unwrap();
+        let filename = "tasks.txt";
+        tm.save_to_file(filename).expect("Failed to save tasks");
+        tm.load_from_file(filename).expect("Failed to load tasks");
+        tm.list_tasks();
+    })
+    .join()
+    .unwrap();
+}
-- 
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