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day 16 solution

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Andrew Coleman 2019-01-07 14:39:03 -05:00
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commit ed5cb25a6d
6 changed files with 4684 additions and 0 deletions

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3 0 2 2
14 2 0 1
14 0 3 3
14 3 1 0
8 1 0 3
1 3 2 3
11 3 2 2
3 2 1 1
14 2 1 3
14 0 0 2
14 0 0 0
12 2 3 0
1 0 2 0
11 0 1 1
3 1 0 0
14 2 2 2
1 1 0 3
4 3 0 3
14 0 1 1
7 3 2 1
1 1 1 1
11 1 0 0
3 0 1 1
14 2 2 3
14 3 0 2
14 2 2 0
9 0 2 3
1 3 2 3
1 3 3 3
11 3 1 1
3 1 0 0
14 1 0 3
1 1 0 1
4 1 3 1
14 1 3 2
10 1 2 1
1 1 2 1
11 1 0 0
3 0 0 1
1 3 0 3
4 3 0 3
14 0 2 0
14 3 2 0
1 0 3 0
11 0 1 1
3 1 2 0
14 1 2 3
14 0 0 1
11 3 3 1
1 1 2 1
1 1 3 1
11 0 1 0
3 0 0 3
14 2 3 0
1 1 0 1
4 1 2 1
14 3 3 2
9 0 2 2
1 2 1 2
11 2 3 3
3 3 0 1
14 0 2 3
14 0 0 0
1 2 0 2
4 2 2 2
7 3 2 2
1 2 2 2
11 2 1 1
3 1 0 2
14 3 0 1
14 3 2 0
14 2 2 3
0 0 3 0
1 0 3 0
11 0 2 2
3 2 2 1
14 1 0 3
14 2 1 0
14 0 3 2
15 0 3 2
1 2 1 2
11 1 2 1
1 1 0 2
4 2 0 2
15 0 3 0
1 0 1 0
11 1 0 1
14 3 3 0
14 0 1 3
14 2 2 2
7 3 2 0
1 0 2 0
11 1 0 1
3 1 0 3
1 1 0 2
4 2 0 2
14 3 0 0
14 1 1 1
1 1 2 2
1 2 3 2
11 2 3 3
3 3 1 1
14 2 0 0
14 0 1 3
14 2 1 2
7 3 2 0
1 0 3 0
11 0 1 1
3 1 2 3
14 0 0 1
14 1 1 0
3 0 2 0
1 0 2 0
1 0 2 0
11 3 0 3
3 3 0 2
14 1 0 1
14 2 3 3
14 2 2 0
5 0 3 1
1 1 1 1
11 2 1 2
3 2 0 1
14 3 0 2
9 0 2 0
1 0 2 0
11 1 0 1
3 1 3 3
14 2 1 0
1 3 0 2
4 2 2 2
14 3 2 1
6 2 1 1
1 1 2 1
11 1 3 3
3 3 0 1
1 2 0 3
4 3 0 3
14 1 3 0
3 0 2 2
1 2 3 2
1 2 1 2
11 2 1 1
3 1 1 2
14 2 2 3
14 3 3 1
1 0 0 0
4 0 3 0
0 1 3 0
1 0 1 0
11 0 2 2
3 2 3 1
14 0 1 2
14 3 1 0
14 1 3 3
1 3 2 0
1 0 1 0
11 1 0 1
14 2 0 3
14 3 2 2
14 2 3 0
5 0 3 2
1 2 2 2
11 2 1 1
3 1 2 0
14 3 3 1
14 0 3 2
12 2 3 3
1 3 1 3
1 3 3 3
11 3 0 0
3 0 2 2
14 0 0 1
14 2 3 0
14 1 2 3
15 0 3 3
1 3 3 3
11 2 3 2
3 2 0 1
14 2 0 3
14 1 3 2
5 0 3 2
1 2 2 2
11 1 2 1
3 1 3 3
1 3 0 0
4 0 1 0
14 0 3 1
14 1 0 2
4 0 1 2
1 2 1 2
11 3 2 3
3 3 1 0
14 0 1 3
1 1 0 2
4 2 3 2
14 2 2 1
12 3 2 2
1 2 3 2
11 2 0 0
3 0 2 1
14 3 2 0
1 1 0 2
4 2 0 2
14 2 3 3
12 2 3 3
1 3 1 3
1 3 1 3
11 3 1 1
3 1 0 3
14 2 0 1
9 2 0 2
1 2 2 2
11 3 2 3
3 3 1 2
14 2 2 0
14 1 3 3
14 0 3 1
15 0 3 1
1 1 1 1
11 1 2 2
3 2 3 0
14 2 1 2
14 0 0 1
14 0 1 3
7 3 2 3
1 3 2 3
11 3 0 0
3 0 2 3
14 2 1 1
14 3 0 0
0 0 1 0
1 0 1 0
11 0 3 3
3 3 3 0
1 2 0 3
4 3 0 3
14 1 2 1
7 3 2 2
1 2 1 2
11 2 0 0
3 0 1 1
14 3 0 2
14 1 0 3
14 2 0 0
15 0 3 2
1 2 3 2
11 2 1 1
14 3 1 0
14 0 2 3
14 2 0 2
7 3 2 2
1 2 2 2
11 1 2 1
14 1 0 0
14 2 2 2
3 0 2 3
1 3 2 3
1 3 3 3
11 1 3 1
3 1 0 0
14 2 2 1
14 0 3 3
14 3 1 1
1 1 2 1
11 1 0 0
3 0 1 1
14 1 0 0
11 0 0 0
1 0 1 0
1 0 1 0
11 1 0 1
3 1 2 2
14 2 1 1
14 3 2 0
14 3 1 3
8 1 0 0
1 0 3 0
1 0 1 0
11 2 0 2
3 2 1 0
14 1 3 3
14 0 3 1
14 2 3 2
4 3 1 3
1 3 2 3
11 3 0 0
3 0 0 3
14 3 1 0
14 1 0 1
8 2 0 2
1 2 3 2
1 2 1 2
11 3 2 3
14 1 1 0
14 3 3 1
14 0 3 2
11 0 0 0
1 0 2 0
11 0 3 3
3 3 0 2
1 3 0 0
4 0 2 0
1 2 0 3
4 3 1 3
15 0 3 0
1 0 3 0
11 0 2 2
14 1 3 0
14 1 0 1
14 2 0 3
11 0 0 3
1 3 1 3
1 3 1 3
11 3 2 2
3 2 0 1
14 0 0 3
14 2 0 2
7 3 2 0
1 0 3 0
11 0 1 1
3 1 2 0
14 1 3 3
14 1 0 1
14 0 2 2
1 1 2 1
1 1 3 1
11 1 0 0
3 0 3 2
14 2 2 0
1 2 0 1
4 1 1 1
13 1 0 0
1 0 1 0
1 0 2 0
11 2 0 2
3 2 1 1
1 3 0 0
4 0 3 0
14 0 3 2
14 2 0 3
9 2 0 2
1 2 3 2
11 1 2 1
14 0 2 2
14 1 3 3
9 2 0 0
1 0 1 0
11 0 1 1
3 1 2 3
14 2 1 0
14 3 0 2
14 1 1 1
14 2 1 0
1 0 1 0
11 0 3 3
14 3 2 0
14 0 1 2
14 2 3 1
10 0 2 0
1 0 2 0
11 3 0 3
3 3 3 2
14 3 1 0
1 0 0 3
4 3 2 3
14 1 1 1
13 1 3 1
1 1 1 1
11 1 2 2
14 1 1 1
14 1 3 3
14 2 3 0
15 0 3 3
1 3 2 3
11 2 3 2
3 2 1 1
14 1 2 0
14 0 3 3
14 2 1 2
7 3 2 2
1 2 2 2
11 2 1 1
14 1 0 2
14 1 3 3
14 2 1 0
15 0 3 3
1 3 2 3
11 1 3 1
14 1 2 3
1 2 0 0
4 0 1 0
14 2 0 2
3 0 2 3
1 3 3 3
11 3 1 1
14 2 3 3
14 2 3 0
5 0 3 3
1 3 1 3
1 3 2 3
11 1 3 1
3 1 3 3
14 1 2 0
1 3 0 1
4 1 1 1
14 3 1 2
1 0 2 0
1 0 2 0
11 0 3 3
14 2 0 2
1 1 0 0
4 0 1 0
14 3 0 1
4 0 1 1
1 1 1 1
1 1 2 1
11 1 3 3
3 3 3 0
14 0 3 3
14 3 0 1
7 3 2 1
1 1 2 1
1 1 2 1
11 0 1 0
3 0 2 1
14 1 3 2
14 2 1 0
14 1 1 3
13 3 0 2
1 2 3 2
11 2 1 1
3 1 1 3
14 2 2 2
14 2 2 1
14 1 3 0
3 0 2 1
1 1 2 1
11 3 1 3
3 3 2 0

371
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#[macro_use]
extern crate log;
extern crate pretty_env_logger;
use std::collections::{HashMap, HashSet};
use std::fs::File;
use std::io::{BufRead, BufReader};
type Registers = [u64; 4];
type Instruction = [u64; 4];
type DecodeTable = HashMap<u64, String>;
struct OpSample {
before: Registers,
instruction: Instruction,
after: Registers,
}
fn extract_values_from_line(line: String) -> Registers {
let reg_chars = line.as_str();
let (_, second) = reg_chars.split_at(9);
let third = second.replace(",", "").replace("]", "");
iter_to_registers(third.split_whitespace())
}
fn iter_to_registers(iter: std::str::SplitWhitespace) -> Registers {
let mut results: Registers = [0u64; 4];
for (index, r) in iter.enumerate() {
results[index] = r.parse::<u64>().unwrap();
}
results
}
fn read_samples_from_file(filename: &str) -> Vec<OpSample> {
let mut lines: Vec<String> = BufReader::new(File::open(filename).unwrap())
.lines()
.map(|line| line.unwrap())
.collect();
let mut samples: Vec<OpSample> = vec![];
while !lines.is_empty() {
let before = extract_values_from_line(lines.remove(0));
let instruction = iter_to_registers(lines.remove(0).split_whitespace());
let after = extract_values_from_line(lines.remove(0));
lines.remove(0);
samples.push(OpSample {
before,
instruction,
after
});
}
samples
}
fn read_instructions_from_file(filename: &str) -> Vec<Instruction> {
let lines: Vec<Instruction> = BufReader::new(File::open(filename).unwrap())
.lines()
.map(|line| iter_to_registers(line.unwrap().split_whitespace()))
.collect();
lines
}
fn addr(input_registers: Registers, instruction: Instruction) -> Registers {
let mut output_registers = input_registers.clone();
output_registers[instruction[3] as usize] = input_registers[instruction[1] as usize] + input_registers[instruction[2] as usize];
debug!("addr: input {:?} output {:?}", input_registers, output_registers);
output_registers
}
fn addi(input_registers: Registers, instruction: Instruction) -> Registers {
let mut output_registers = input_registers.clone();
output_registers[instruction[3] as usize] = input_registers[instruction[1] as usize] + instruction[2];
debug!("addi: input {:?} output {:?}", input_registers, output_registers);
output_registers
}
fn mulr(input_registers: Registers, instruction: Instruction) -> Registers {
let mut output_registers = input_registers.clone();
output_registers[instruction[3] as usize] = input_registers[instruction[1] as usize] * input_registers[instruction[2] as usize];
debug!("mulr: input {:?} output {:?}", input_registers, output_registers);
output_registers
}
fn muli(input_registers: Registers, instruction: Instruction) -> Registers {
let mut output_registers = input_registers.clone();
output_registers[instruction[3] as usize] = input_registers[instruction[1] as usize] * instruction[2];
debug!("muli: input {:?} output {:?}", input_registers, output_registers);
output_registers
}
fn banr(input_registers: Registers, instruction: Instruction) -> Registers {
let mut output_registers = input_registers.clone();
output_registers[instruction[3] as usize] = input_registers[instruction[1] as usize] & input_registers[instruction[2] as usize];
debug!("banr: input {:?} output {:?}", input_registers, output_registers);
output_registers
}
fn bani(input_registers: Registers, instruction: Instruction) -> Registers {
let mut output_registers = input_registers.clone();
output_registers[instruction[3] as usize] = input_registers[instruction[1] as usize] & instruction[2];
debug!("bani: input {:?} output {:?}", input_registers, output_registers);
output_registers
}
fn borr(input_registers: Registers, instruction: Instruction) -> Registers {
let mut output_registers = input_registers.clone();
output_registers[instruction[3] as usize] = input_registers[instruction[1] as usize] | input_registers[instruction[2] as usize];
debug!("borr: input {:?} output {:?}", input_registers, output_registers);
output_registers
}
fn bori(input_registers: Registers, instruction: Instruction) -> Registers {
let mut output_registers = input_registers.clone();
output_registers[instruction[3] as usize] = input_registers[instruction[1] as usize] | instruction[2];
debug!("bori: input {:?} output {:?}", input_registers, output_registers);
output_registers
}
fn setr(input_registers: Registers, instruction: Instruction) -> Registers {
let mut output_registers = input_registers.clone();
output_registers[instruction[3] as usize] = input_registers[instruction[1] as usize];
debug!("setr: input {:?} output {:?}", input_registers, output_registers);
output_registers
}
fn seti(input_registers: Registers, instruction: Instruction) -> Registers {
let mut output_registers = input_registers.clone();
output_registers[instruction[3] as usize] = instruction[1];
debug!("seti: input {:?} output {:?}", input_registers, output_registers);
output_registers
}
fn gtir(input_registers: Registers, instruction: Instruction) -> Registers {
let mut output_registers = input_registers.clone();
if instruction[1] > input_registers[instruction[2] as usize] {
output_registers[instruction[3] as usize] = 1;
} else {
output_registers[instruction[3] as usize] = 0;
}
debug!("gtir: input {:?} output {:?}", input_registers, output_registers);
output_registers
}
fn gtri(input_registers: Registers, instruction: Instruction) -> Registers {
let mut output_registers = input_registers.clone();
if input_registers[instruction[1] as usize] > instruction[2] {
output_registers[instruction[3] as usize] = 1;
} else {
output_registers[instruction[3] as usize] = 0;
}
debug!("gtri: input {:?} output {:?}", input_registers, output_registers);
output_registers
}
fn gtrr(input_registers: Registers, instruction: Instruction) -> Registers {
let mut output_registers = input_registers.clone();
if input_registers[instruction[1] as usize] > input_registers[instruction[2] as usize] {
output_registers[instruction[3] as usize] = 1;
} else {
output_registers[instruction[3] as usize] = 0;
}
debug!("gtrr: input {:?} output {:?}", input_registers, output_registers);
output_registers
}
fn eqir(input_registers: Registers, instruction: Instruction) -> Registers {
let mut output_registers = input_registers.clone();
if instruction[1] == input_registers[instruction[2] as usize] {
output_registers[instruction[3] as usize] = 1;
} else {
output_registers[instruction[3] as usize] = 0;
}
debug!("eqir: input {:?} output {:?}", input_registers, output_registers);
output_registers
}
fn eqri(input_registers: Registers, instruction: Instruction) -> Registers {
let mut output_registers = input_registers.clone();
if input_registers[instruction[1] as usize] == instruction[2] {
output_registers[instruction[3] as usize] = 1;
} else {
output_registers[instruction[3] as usize] = 0;
}
debug!("eqri: input {:?} output {:?}", input_registers, output_registers);
output_registers
}
fn eqrr(input_registers: Registers, instruction: Instruction) -> Registers {
let mut output_registers = input_registers.clone();
if input_registers[instruction[1] as usize] == input_registers[instruction[2] as usize] {
output_registers[instruction[3] as usize] = 1;
} else {
output_registers[instruction[3] as usize] = 0;
}
debug!("eqrr: input {:?} output {:?}", input_registers, output_registers);
output_registers
}
fn matching_opcodes(i: &OpSample) -> Vec<&str> {
let mut m: Vec<&str> = Vec::with_capacity(16);
if addr(i.before, i.instruction) == i.after {
debug!("{:?} matches addr", i.instruction);
m.push("addr");
}
if addi(i.before, i.instruction) == i.after {
debug!("{:?} matches addi", i.instruction);
m.push("addi");
}
if mulr(i.before, i.instruction) == i.after {
debug!("{:?} matches mulr", i.instruction);
m.push("mulr");
}
if muli(i.before, i.instruction) == i.after {
debug!("{:?} matches muli", i.instruction);
m.push("muli");
}
if banr(i.before, i.instruction) == i.after {
debug!("{:?} matches banr", i.instruction);
m.push("banr");
}
if bani(i.before, i.instruction) == i.after {
debug!("{:?} matches bani", i.instruction);
m.push("bani");
}
if borr(i.before, i.instruction) == i.after {
debug!("{:?} matches borr", i.instruction);
m.push("borr");
}
if bori(i.before, i.instruction) == i.after {
debug!("{:?} matches bori", i.instruction);
m.push("bori");
}
if setr(i.before, i.instruction) == i.after {
debug!("{:?} matches setr", i.instruction);
m.push("setr");
}
if seti(i.before, i.instruction) == i.after {
debug!("{:?} matches seti", i.instruction);
m.push("seti");
}
if gtir(i.before, i.instruction) == i.after {
debug!("{:?} matches gtir", i.instruction);
m.push("gtir");
}
if gtri(i.before, i.instruction) == i.after {
debug!("{:?} matches gtri", i.instruction);
m.push("gtri");
}
if gtrr(i.before, i.instruction) == i.after {
debug!("{:?} matches gtrr", i.instruction);
m.push("gtrr");
}
if eqir(i.before, i.instruction) == i.after {
debug!("{:?} matches eqir", i.instruction);
m.push("eqir");
}
if eqri(i.before, i.instruction) == i.after {
debug!("{:?} matches eqri", i.instruction);
m.push("eqri");
}
if eqrr(i.before, i.instruction) == i.after {
debug!("{:?} matches eqrr", i.instruction);
m.push("eqrr");
}
m
}
fn reduce_decode_map(map: &mut HashMap<u64, HashSet<&str>>) -> DecodeTable {
let mut results: DecodeTable = HashMap::new();
let mut removed_one = true;
while !map.is_empty() && removed_one {
removed_one = false;
let mut this_pass_found_opcodes: HashSet<u64> = HashSet::new();
let mut this_pass_found_instr: HashSet<&str> = HashSet::new();
for (confirmed_op, confirmed_instructions) in map.iter() {
if confirmed_instructions.len() > 1 {
continue;
}
removed_one = true;
let confirmed_instruction = confirmed_instructions.iter().nth(0).unwrap();
results.entry(*confirmed_op).or_insert(confirmed_instruction.to_string());
this_pass_found_opcodes.insert(*confirmed_op);
this_pass_found_instr.insert(*confirmed_instruction);
}
for op in this_pass_found_opcodes.iter() {
map.retain(|k,_| k != op);
}
for instr in this_pass_found_instr.iter() {
for (_k,v) in map.iter_mut() {
v.retain(|i| i != instr);
}
}
}
results
}
fn opcodes_part_one(samples: &Vec<OpSample>) -> (u16, DecodeTable) {
let mut i: u16 = 0;
let mut decode_map: HashMap<u64, HashSet<&str>> = HashMap::new();
for sample in samples.iter() {
let matched_ops = matching_opcodes(&sample);
if matched_ops.len() >= 3 {
i += 1;
}
debug!("{:?} matches {} opcodes", sample.instruction, matched_ops.len());
let instruction = sample.instruction[0];
for op in matched_ops.iter() {
decode_map.entry(instruction).and_modify(|m| {
m.insert(op);
}).or_insert(HashSet::<&str>::new());
}
}
let final_decode_map = reduce_decode_map(&mut decode_map);
for (op, instr) in final_decode_map.iter() {
debug!("final decode of {} into {}", op, instr);
}
(i, final_decode_map)
}
fn execute_program(decode_table: &DecodeTable, instructions: &Vec<Instruction>) -> Registers {
let mut registers: Registers = [0u64; 4];
for instruction in instructions.iter() {
debug!("{:?}", instruction);
registers = match decode_table.get(&instruction[0]) {
Some(x) => {
match x.as_str() {
"addr" => addr(registers, *instruction),
"addi" => addi(registers, *instruction),
"mulr" => mulr(registers, *instruction),
"muli" => muli(registers, *instruction),
"banr" => banr(registers, *instruction),
"bani" => bani(registers, *instruction),
"borr" => borr(registers, *instruction),
"bori" => bori(registers, *instruction),
"setr" => setr(registers, *instruction),
"seti" => seti(registers, *instruction),
"gtir" => gtir(registers, *instruction),
"gtri" => gtri(registers, *instruction),
"gtrr" => gtrr(registers, *instruction),
"eqir" => eqir(registers, *instruction),
"eqri" => eqri(registers, *instruction),
"eqrr" => eqrr(registers, *instruction),
_ => panic!("No decoded instruction available for {}", x),
}
},
None => panic!("Unmapped instruction!"),
}
}
registers
}
fn main() {
pretty_env_logger::init();
let samples = read_samples_from_file("input-part-1");
debug!("samples len is {}", samples.len());
let (part1, decode_table) = opcodes_part_one(&samples);
println!("samples matching 3 or more opcodes: {}", part1);
let program = read_instructions_from_file("input-part-2");
let registers: Registers = execute_program(&decode_table, &program);
println!("final registers: {:?}", registers);
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_sample_one() {
let samples = read_samples_from_file("test-input");
assert_eq!(matching_opcodes(&samples[0]), 3);
}
}

4
2018/day16/test-input Normal file
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Before: [3, 2, 1, 1]
9 2 1 2
After: [3, 2, 2, 1]