Add '2018/' from commit '4f35fa85150c24c3c606851be3a8cd5efd6f5500'

git-subtree-dir: 2018
git-subtree-mainline: 5ccd921b23
git-subtree-split: 4f35fa8515

2018/.gitignore

@@ -0,0 +1,2 @@
+*/input
+

2018/01/part1.rs

@@ -0,0 +1,30 @@
+use std::error::Error;
+use std::fs::File;
+use std::io::BufReader;
+use std::io::prelude::*;
+
+fn main() -> std::io::Result<()> {
+    let file = match File::open("input") {
+        // The `description` method of `io::Error` returns a string that describes the error
+        Err(why) => panic!("couldn't open input: {}", Error::description(&why)),
+        Ok(file) => file,
+    };
+
+    let reader = BufReader::new(file);
+    let lines = reader.lines();
+
+    let mut total: i128 = 0;
+
+    for result in lines {
+        let l = result.unwrap();
+        let offset:i128 = i128::from_str_radix(&l, 10).unwrap();
+
+        println!("{} => {}", l, offset);
+
+        total = total + offset;
+    }
+
+    println!("{}", total);
+
+    Ok(())
+}

2018/01/part2.rs

@@ -0,0 +1,45 @@
+use std::collections::HashSet;
+use std::error::Error;
+use std::fs::File;
+use std::io::BufReader;
+use std::io::SeekFrom;
+use std::io::prelude::*;
+
+fn main() -> std::io::Result<()> {
+    let mut file = match File::open("input") {
+        // The `description` method of `io::Error` returns a string that describes the error
+        Err(why) => panic!("couldn't open input: {}", Error::description(&why)),
+        Ok(file) => file,
+    };
+
+    let mut repeat = true;
+    let mut total: i128 = 0;
+    let mut seen = HashSet::<i128>::new();
+    seen.insert(0);
+
+    while repeat {
+        file.seek(SeekFrom::Start(0));
+        let reader = BufReader::new(&file);
+        let lines = reader.lines();
+
+        for result in lines {
+            let l = result.unwrap();
+            let offset:i128 = i128::from_str_radix(&l, 10).unwrap();
+
+            total = total + offset;
+            println!("{} => {}", offset, total);
+
+            if seen.contains(&total) {
+                println!("seen {} before", total);
+                repeat = false;
+                break;
+            }
+
+            seen.insert(total);
+       }
+   }
+
+    println!("{}", total);
+
+    Ok(())
+}

2018/02/part1.rs

@@ -0,0 +1,48 @@
+use std::collections::HashMap;
+use std::error::Error;
+use std::fs::File;
+use std::io::BufReader;
+use std::io::prelude::*;
+
+fn main() -> std::io::Result<()> {
+    let file = match File::open("input") {
+        Err(why) => panic!("couldn't open input: {}", Error::description(&why)),
+        Ok(file) => file,
+    };
+
+    let reader = BufReader::new(file);
+    let lines = reader.lines();
+
+    for result in lines {
+        let l = result.unwrap();
+        let mut freq = HashMap::new();
+        let mut is2 = false;
+        let mut is3 = false;
+
+        for ch in l.chars() {
+            let count = freq.entry(ch).or_insert(0);
+            *count += 1;
+        }
+
+        for (_ch, count) in freq {
+            if count == 2 {
+                is2 = true;
+            }
+            if count == 3 {
+                is3 = true;
+            }
+        }
+
+        if is2 {
+            count2+=1;
+        }
+        
+        if is3 {
+            count3+=1;
+        }
+    }
+
+    println!("2: {} 3: {} 2*3: {}", count2, count3, count2 * count3);
+
+    Ok(())
+}

2018/02/part2.rs

@@ -0,0 +1,33 @@
+use std::collections::HashMap;
+use std::error::Error;
+use std::fs::File;
+use std::io::BufReader;
+use std::io::prelude::*;
+
+fn main() -> std::io::Result<()> {
+    let mut f = File::open("input")?;
+    let mut data = String::new();
+
+    f.read_to_string(&mut data)?;
+
+    for lineA in data.lines() {
+        for lineB in data.lines() {
+            let mut a = lineA.chars();
+            let mut b = lineB.chars();
+            let mut diffCount = 0;
+            let mut pairs = a.zip(b);
+
+            for (aChar, bChar) in pairs {
+                if aChar != bChar {
+                    diffCount += 1;
+                }
+            }
+
+            if diffCount == 1 {
+                println!("lineA: {} lineB: {}", lineA, lineB);
+            }
+        }
+    }
+
+    Ok(())
+}

2018/03/part1/Cargo.lock

@@ -0,0 +1,104 @@
+[[package]]
+name = "aho-corasick"
+version = "0.6.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "memchr 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "cfg-if"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "lazy_static"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "libc"
+version = "0.2.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "memchr"
+version = "2.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
+ "version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "part1"
+version = "0.1.0"
+dependencies = [
+ "scan_fmt 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "regex"
+version = "0.2.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "aho-corasick 0.6.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "utf8-ranges 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.5.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "ucd-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "scan_fmt"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "regex 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "thread_local"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "ucd-util"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "utf8-ranges"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "version_check"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[metadata]
+"checksum aho-corasick 0.6.9 (registry+https://github.com/rust-lang/crates.io-index)" = "1e9a933f4e58658d7b12defcf96dc5c720f20832deebe3e0a19efd3b6aaeeb9e"
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2018/03/part1/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "part1"
+version = "0.1.0"
+authors = ["Nick Thomas <me@ur.gs>"]
+edition = "2018"
+
+[dependencies]
+scan_fmt = "0.1.3"

2018/03/part1/src/main.rs

@@ -0,0 +1,98 @@
+#[macro_use] extern crate scan_fmt;
+
+use std::fs::File;
+use std::io::BufReader;
+use std::io::prelude::*;
+
+#[derive(Hash, Eq, PartialEq, Debug)]
+struct Point {
+    x: usize,
+    y: usize,
+}
+
+#[derive(Hash, Eq, PartialEq, Debug)]
+struct Rect {
+    a: Point,
+    b: Point,
+}
+
+#[derive(Hash, Eq, PartialEq, Debug)]
+struct Claim {
+    id: u32,
+    area: Rect,
+}
+
+impl Claim {
+    fn new(from: &str) -> Claim {
+        let (id,x,y,w,h) = scan_fmt!(
+            from,
+            "#{} @ {},{}: {}x{}",
+            u32, usize, usize, usize, usize
+        );
+
+        return Claim{
+            id: id.unwrap(),
+            area: Rect {
+                a: Point {x: x.unwrap(), y: y.unwrap()},
+                b: Point {x: x.unwrap()+w.unwrap(), y: y.unwrap()+h.unwrap()},
+            },
+        }
+    }
+}
+
+fn main() -> std::io::Result<()> {
+    let f = File::open("../input")?;
+    let reader = BufReader::new(f);
+
+    let mut claims: Vec<Claim> = Vec::new();
+    let mut max_x = 0;
+    let mut max_y = 0;
+
+    for line in reader.lines() {
+        let claim = Claim::new(&line.unwrap());
+
+        if claim.area.b.x > max_x {
+            max_x = claim.area.b.x;
+        }
+
+        if claim.area.b.y > max_y {
+            max_y = claim.area.b.y;
+        }
+
+        claims.push(claim);
+    }
+
+    println!("{} {}", max_x, max_y);
+
+    let mut field: Vec<Vec<usize>> = Vec::new();
+    for i in 0..max_y {
+        let mut x_row: Vec<usize> = Vec::new();
+
+        for _ in 0..max_x {
+            x_row.push(0);
+        }
+
+        field.push(x_row);
+    }
+
+    for claim in claims {
+        for x in claim.area.a.x..claim.area.b.x {
+            for y in claim.area.a.y..claim.area.b.y {
+                field[y as usize][x as usize] += 1;
+            }
+        }
+    }
+
+    let mut count = 0;
+    for y in field {
+        for val in y {
+            if val > 1 {
+                count += 1;
+            }
+        }
+    }
+
+    println!("{}", count);
+
+    Ok(())
+}

2018/03/part2/Cargo.lock

@@ -0,0 +1,104 @@
+[[package]]
+name = "aho-corasick"
+version = "0.6.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "memchr 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "cfg-if"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "lazy_static"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "libc"
+version = "0.2.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "memchr"
+version = "2.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
+ "version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "part2"
+version = "0.1.0"
+dependencies = [
+ "scan_fmt 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "regex"
+version = "0.2.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "aho-corasick 0.6.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "utf8-ranges 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.5.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "ucd-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "scan_fmt"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "regex 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "thread_local"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "ucd-util"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "utf8-ranges"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "version_check"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[metadata]
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2018/03/part2/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "part2"
+version = "0.1.0"
+authors = ["Nick Thomas <me@ur.gs>"]
+edition = "2018"
+
+[dependencies]
+scan_fmt = "0.1.3"

2018/03/part2/src/main.rs

@@ -0,0 +1,104 @@
+#[macro_use] extern crate scan_fmt;
+
+use std::collections::HashSet;
+use std::fs::File;
+use std::io::BufReader;
+use std::io::prelude::*;
+
+#[derive(Hash, Eq, PartialEq, Debug)]
+struct Point {
+    x: usize,
+    y: usize,
+}
+
+#[derive(Hash, Eq, PartialEq, Debug)]
+struct Rect {
+    a: Point,
+    b: Point,
+}
+
+#[derive(Hash, Eq, PartialEq, Debug)]
+struct Claim {
+    id: u32,
+    area: Rect,
+}
+
+impl Claim {
+    fn new(from: &str) -> Claim {
+        let (id,x,y,w,h) = scan_fmt!(
+            from,
+            "#{} @ {},{}: {}x{}",
+            u32, usize, usize, usize, usize
+        );
+
+        return Claim{
+            id: id.unwrap(),
+            area: Rect {
+                a: Point {x: x.unwrap(), y: y.unwrap()},
+                b: Point {x: x.unwrap()+w.unwrap(), y: y.unwrap()+h.unwrap()},
+            },
+        }
+    }
+}
+
+fn main() -> std::io::Result<()> {
+    let f = File::open("../input")?;
+    let reader = BufReader::new(f);
+
+    let mut claims: Vec<Claim> = Vec::new();
+    let mut max_x = 0;
+    let mut max_y = 0;
+
+    for line in reader.lines() {
+        let claim = Claim::new(&line.unwrap());
+
+        if claim.area.b.x > max_x {
+            max_x = claim.area.b.x;
+        }
+
+        if claim.area.b.y > max_y {
+            max_y = claim.area.b.y;
+        }
+
+        claims.push(claim);
+    }
+
+    let mut field: Vec<Vec<Vec<u32>>> = Vec::new();
+    for _ in 0..max_y {
+        let mut x_row: Vec<Vec<u32>> = Vec::new();
+
+        for _ in 0..max_x {
+            x_row.push(Vec::new());
+        }
+
+        field.push(x_row);
+    }
+
+    for claim in &claims {
+        for x in claim.area.a.x..claim.area.b.x {
+            for y in claim.area.a.y..claim.area.b.y {
+                field[y][x].push(claim.id);
+            }
+        }
+    }
+
+    let mut bad = HashSet::new();
+
+    for y in field {
+        for x in y {
+            if x.len() > 1 {
+                for id in x {
+                    bad.insert(id);
+                }
+            }
+        }
+    }
+
+    for claim in &claims {
+        if !bad.contains(&claim.id) {
+            println!("{} is good", claim.id)
+        }
+    }
+
+    Ok(())
+}