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-rw-r--r--2016/aoc25/Cargo.lock98
-rw-r--r--2016/aoc25/Cargo.toml7
-rw-r--r--2016/aoc25/input.txt30
-rw-r--r--2016/aoc25/src/main.rs284
4 files changed, 419 insertions, 0 deletions
diff --git a/2016/aoc25/Cargo.lock b/2016/aoc25/Cargo.lock
new file mode 100644
index 0000000..c4553c9
--- /dev/null
+++ b/2016/aoc25/Cargo.lock
@@ -0,0 +1,98 @@
+[root]
+name = "aoc25"
+version = "0.1.0"
+dependencies = [
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+]
+
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+dependencies = [
+ "memchr 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
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+ "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
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+version = "0.1.11"
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+dependencies = [
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+ "libc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "thread-id 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "winapi-build"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
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diff --git a/2016/aoc25/Cargo.toml b/2016/aoc25/Cargo.toml
new file mode 100644
index 0000000..aa84af4
--- /dev/null
+++ b/2016/aoc25/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "aoc25"
+version = "0.1.0"
+authors = ["Justin Worthe <justin.worthe@gmail.com>"]
+
+[dependencies]
+regex = "0.1" \ No newline at end of file
diff --git a/2016/aoc25/input.txt b/2016/aoc25/input.txt
new file mode 100644
index 0000000..a9734a4
--- /dev/null
+++ b/2016/aoc25/input.txt
@@ -0,0 +1,30 @@
+cpy a d
+cpy 7 c
+cpy 362 b
+inc d
+dec b
+jnz b -2
+dec c
+jnz c -5
+cpy d a
+jnz 0 0
+cpy a b
+cpy 0 a
+cpy 2 c
+jnz b 2
+jnz 1 6
+dec b
+dec c
+jnz c -4
+inc a
+jnz 1 -7
+cpy 2 b
+jnz c 2
+jnz 1 4
+dec b
+dec c
+jnz 1 -4
+jnz 0 0
+out b
+jnz a -19
+jnz 1 -21
diff --git a/2016/aoc25/src/main.rs b/2016/aoc25/src/main.rs
new file mode 100644
index 0000000..7db2ce5
--- /dev/null
+++ b/2016/aoc25/src/main.rs
@@ -0,0 +1,284 @@
+extern crate regex;
+use regex::Regex;
+
+use std::io::BufReader;
+use std::io::prelude::*;
+use std::fs::File;
+
+enum Instruction {
+ Inc(usize),
+ Dec(usize),
+
+ TglLit(i32),
+ TglReg(usize),
+
+ OutLit(i32),
+ OutReg(usize),
+
+ CpyLitReg(i32, usize),
+ CpyRegReg(usize, usize),
+ CpyLitLit(i32, i32),
+ CpyRegLit(usize, i32),
+
+ JnzLitLit(i32, i32),
+ JnzRegLit(usize, i32),
+ JnzLitReg(i32, usize),
+ JnzRegReg(usize, usize),
+
+ Noop
+}
+
+impl Instruction {
+ fn parse(line: &str) -> Instruction {
+ match Regex::new(r"inc (a|b|c|d)").unwrap().captures(line) {
+ Some(cap) => {
+ let reg = to_register_index(cap.at(1).unwrap());
+ return Instruction::Inc(reg);
+ },
+ _ => {}
+ }
+
+ match Regex::new(r"dec (a|b|c|d)").unwrap().captures(line) {
+ Some(cap) => {
+ let reg = to_register_index(cap.at(1).unwrap());
+ return Instruction::Dec(reg);
+ },
+ _ => {}
+ }
+
+
+ match Regex::new(r"tgl (a|b|c|d)").unwrap().captures(line) {
+ Some(cap) => {
+ let reg = to_register_index(cap.at(1).unwrap());
+ return Instruction::TglReg(reg);
+ },
+ _ => {}
+ }
+
+ match Regex::new(r"tgl ([-\d]+)").unwrap().captures(line) {
+ Some(cap) => {
+ let lit = cap.at(1).unwrap().parse().unwrap();
+ return Instruction::TglLit(lit);
+ },
+ _ => {}
+ }
+
+
+ match Regex::new(r"out (a|b|c|d)").unwrap().captures(line) {
+ Some(cap) => {
+ let reg = to_register_index(cap.at(1).unwrap());
+ return Instruction::OutReg(reg);
+ },
+ _ => {}
+ }
+
+ match Regex::new(r"out ([-\d]+)").unwrap().captures(line) {
+ Some(cap) => {
+ let lit = cap.at(1).unwrap().parse().unwrap();
+ return Instruction::OutLit(lit);
+ },
+ _ => {}
+ }
+
+
+ match Regex::new(r"cpy ([-\d]+) (a|b|c|d)").unwrap().captures(line) {
+ Some(cap) => {
+ let src = cap.at(1).unwrap().parse().unwrap();
+ let dest = to_register_index(cap.at(2).unwrap());
+ return Instruction::CpyLitReg(src, dest);
+ },
+ _ => {}
+ }
+
+ match Regex::new(r"cpy (a|b|c|d) (a|b|c|d)").unwrap().captures(line) {
+ Some(cap) => {
+ let src = to_register_index(cap.at(1).unwrap());
+ let dest = to_register_index(cap.at(2).unwrap());
+ return Instruction::CpyRegReg(src, dest);
+ },
+ _ => {}
+ }
+
+ match Regex::new(r"cpy ([-\d]+) ([-\d]+)").unwrap().captures(line) {
+ Some(cap) => {
+ let src = cap.at(1).unwrap().parse().unwrap();
+ let dest = cap.at(2).unwrap().parse().unwrap();
+ return Instruction::CpyLitLit(src, dest);
+ },
+ _ => {}
+ }
+
+ match Regex::new(r"cpy (a|b|c|d) ([-\d]+)").unwrap().captures(line) {
+ Some(cap) => {
+ let src = to_register_index(cap.at(1).unwrap());
+ let dest = cap.at(2).unwrap().parse().unwrap();
+ return Instruction::CpyRegReg(src, dest);
+ },
+ _ => {}
+ }
+
+
+ match Regex::new(r"jnz ([-\d]+) (a|b|c|d)").unwrap().captures(line) {
+ Some(cap) => {
+ let src = cap.at(1).unwrap().parse().unwrap();
+ let dest = to_register_index(cap.at(2).unwrap());
+ return Instruction::JnzLitReg(src, dest);
+ },
+ _ => {}
+ }
+
+ match Regex::new(r"jnz (a|b|c|d) (a|b|c|d)").unwrap().captures(line) {
+ Some(cap) => {
+ let src = to_register_index(cap.at(1).unwrap());
+ let dest = to_register_index(cap.at(2).unwrap());
+ return Instruction::JnzRegReg(src, dest);
+ },
+ _ => {}
+ }
+
+ match Regex::new(r"jnz ([-\d]+) ([-\d]+)").unwrap().captures(line) {
+ Some(cap) => {
+ let src = cap.at(1).unwrap().parse().unwrap();
+ let dest = cap.at(2).unwrap().parse().unwrap();
+ return Instruction::JnzLitLit(src, dest);
+ },
+ _ => {}
+ }
+
+ match Regex::new(r"jnz (a|b|c|d) ([-\d]+)").unwrap().captures(line) {
+ Some(cap) => {
+ let src = to_register_index(cap.at(1).unwrap());
+ let dest = cap.at(2).unwrap().parse().unwrap();
+ return Instruction::JnzRegLit(src, dest);
+ },
+ _ => {}
+ }
+
+ panic!("Invalid instruction line");
+ }
+
+ fn toggle(&self) -> Self {
+ match *self {
+ Instruction::Inc(a) => Instruction::Dec(a),
+ Instruction::Dec(a) => Instruction::Inc(a),
+
+ Instruction::TglLit(_) => Instruction::Noop,
+ Instruction::TglReg(a) => Instruction::Inc(a),
+
+ Instruction::OutLit(_) => Instruction::Noop,
+ Instruction::OutReg(a) => Instruction::Inc(a),
+
+ Instruction::CpyLitReg(a, b) => Instruction::JnzLitReg(a, b),
+ Instruction::CpyRegReg(a, b) => Instruction::JnzRegReg(a, b),
+ Instruction::CpyLitLit(a, b) => Instruction::JnzLitLit(a, b),
+ Instruction::CpyRegLit(a, b) => Instruction::JnzRegLit(a, b),
+
+ Instruction::JnzLitLit(a, b) => Instruction::CpyLitLit(a, b),
+ Instruction::JnzRegLit(a, b) => Instruction::CpyRegLit(a, b),
+ Instruction::JnzLitReg(a, b) => Instruction::CpyLitReg(a, b),
+ Instruction::JnzRegReg(a, b) => Instruction::CpyRegReg(a, b),
+ Instruction::Noop => Instruction::Noop
+ }
+ }
+}
+
+fn main() {
+ let expected_output = vec!(0, 1, 0, 1, 0, 1, 0, 1, 0, 1);
+ let min_input = (0..).find(|&i| run_program(i) == expected_output).unwrap();
+ println!("{}", min_input);
+}
+
+
+fn run_program(input: i32) -> Vec<i32> {
+ let mut transmission = Vec::new();
+ let mut program = read_file();
+
+ let mut registers: [i32; 4] = [input, 0, 0, 0];
+ let mut pc: usize = 0;
+
+ while pc < program.len() && transmission.len() < 10 {
+ let mut pc_next: usize = pc+1;
+
+ match program[pc] {
+ Instruction::Inc(dest) => {
+ registers[dest] += 1;
+ },
+ Instruction::Dec(dest) => {
+ registers[dest] -= 1;
+ },
+
+ Instruction::TglReg(offset) => {
+ let line_to_toggle = (pc as i32 + registers[offset]) as usize;
+ if line_to_toggle > 0 && line_to_toggle < program.len() {
+ program[line_to_toggle] = program[line_to_toggle].toggle();
+ }
+ },
+ Instruction::TglLit(offset) => {
+ let line_to_toggle = (pc as i32 + offset) as usize;
+ if line_to_toggle > 0 && line_to_toggle < program.len() {
+ program[line_to_toggle] = program[line_to_toggle].toggle();
+ }
+ },
+
+ Instruction::OutReg(output) => {
+ transmission.push(registers[output]);
+ },
+ Instruction::OutLit(output) => {
+ transmission.push(output);
+ },
+
+ Instruction::CpyLitReg(src, dest) => {
+ registers[dest] = src;
+ },
+ Instruction::CpyRegReg(src, dest) => {
+ registers[dest] = registers[src];
+ },
+ Instruction::CpyLitLit(_, _) | Instruction::CpyRegLit(_, _) => {},
+
+ Instruction::JnzRegLit(condition, offset) => {
+ if registers[condition] != 0 {
+ pc_next = (pc as i32 + offset) as usize;
+ }
+ },
+ Instruction::JnzLitLit(condition, offset) => {
+ if condition != 0 {
+ pc_next = (pc as i32 + offset) as usize;
+ }
+ },
+ Instruction::JnzRegReg(condition, offset) => {
+ if registers[condition] != 0 {
+ pc_next = (pc as i32 + registers[offset]) as usize;
+ }
+ },
+ Instruction::JnzLitReg(condition, offset) => {
+ if condition != 0 {
+ pc_next = (pc as i32 + registers[offset]) as usize;
+ }
+ },
+ Instruction::Noop => {}
+ }
+
+ pc = pc_next;
+ }
+
+ transmission
+}
+
+fn to_register_index(name: &str) -> usize {
+ match name {
+ "a" => 0,
+ "b" => 1,
+ "c" => 2,
+ "d" => 3,
+ _ => panic!("Invalid register provided")
+ }
+}
+
+fn read_file() -> Vec<Instruction> {
+ let file = BufReader::new(File::open("input.txt").unwrap());
+ file.lines()
+ .map(|line| line.unwrap())
+ .filter(|line| line.len() > 0)
+ .map(|line| Instruction::parse(line.trim()))
+ .collect()
+}