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Completed day 8

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This commit is contained in:
Tyler Hallada 2020-12-08 00:48:46 -05:00
parent 88ae26c6cc
commit af802bb140
5 changed files with 822 additions and 0 deletions
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14
day08/Cargo.lock generated Normal file
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# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
[[package]]
name = "anyhow"
version = "1.0.35"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2c0df63cb2955042487fad3aefd2c6e3ae7389ac5dc1beb28921de0b69f779d4"
[[package]]
name = "day08"
version = "0.1.0"
dependencies = [
"anyhow",
]

10
day08/Cargo.toml Normal file
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[package]
name = "day08"
version = "0.1.0"
authors = ["Tyler Hallada <tyler@hallada.net>"]
edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
anyhow = "1.0"

633
day08/input/input.txt Executable file
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acc +33
acc -7
acc +39
jmp +214
jmp +250
jmp +51
acc +29
acc +6
acc +20
jmp +489
nop +181
acc +4
jmp +187
nop +454
acc -10
acc +44
jmp +343
acc +14
acc +24
acc +37
acc -12
jmp +596
acc +21
acc +39
jmp +601
acc -15
jmp +304
acc -7
jmp +302
acc +38
jmp +148
acc -6
jmp +235
acc +6
nop +429
acc +49
acc +3
jmp +255
acc +2
jmp +10
acc +27
acc +0
acc -3
acc +28
jmp +565
acc -16
acc +39
acc -5
jmp +513
acc +43
acc +24
jmp +26
nop +19
nop +71
nop +182
jmp +477
acc +42
jmp +535
acc +38
acc +29
acc +1
jmp +1
jmp +72
acc +25
acc +43
acc +6
jmp +1
jmp +111
acc +43
acc +13
jmp +30
acc +4
acc +24
acc +20
acc -14
jmp +161
jmp +73
nop +108
jmp +547
nop +273
acc -8
nop +358
nop +284
jmp +526
acc +50
jmp +274
jmp +486
nop +167
acc -13
jmp +11
acc +10
jmp +508
acc -11
acc +46
acc +44
jmp +335
jmp +1
acc -16
acc +30
jmp +289
acc +15
nop +265
jmp +1
nop +68
jmp +107
acc -15
jmp -101
acc +28
acc -13
jmp +17
acc +21
acc +46
acc +19
acc -8
jmp +274
nop +237
jmp -111
nop +419
acc +28
acc +26
jmp +275
acc -4
jmp +483
jmp +1
jmp +201
jmp +234
acc +26
acc +21
acc +18
jmp +149
acc +0
acc +29
acc +11
jmp -41
nop +111
nop +212
jmp +172
acc +31
acc +17
acc +6
jmp -40
acc +7
acc +44
acc +41
acc +4
jmp -74
acc -16
acc +37
jmp +119
acc -13
acc +44
acc +21
acc +38
jmp +92
acc +30
jmp +444
jmp +35
acc +3
acc +11
acc +31
jmp -104
acc -10
acc +5
acc +8
acc +31
jmp +127
nop +168
acc +16
acc +6
acc +0
jmp +455
acc +15
acc +0
acc +22
acc -1
jmp +191
acc +16
jmp +56
acc -12
acc +40
nop -140
acc +44
jmp +138
acc +44
jmp +237
acc +15
acc +40
jmp +360
acc +14
acc +14
jmp +185
nop +211
acc +27
acc -8
acc +17
jmp +247
acc +50
acc -2
jmp -49
acc +37
jmp +330
acc +14
acc +44
acc +15
nop -43
jmp +382
jmp -45
acc +46
acc -11
acc +47
jmp +61
nop +252
acc +44
acc -13
jmp +292
acc -6
jmp +199
acc +44
acc +28
acc +17
acc +31
jmp -158
acc -8
jmp +338
acc +0
acc -2
nop +306
jmp -78
acc +11
acc +33
acc +40
acc +33
jmp -169
jmp +273
acc +8
jmp -135
acc +20
acc -14
acc -15
nop +370
jmp +20
nop +51
acc -4
acc -10
jmp -215
acc +22
acc +22
jmp +209
acc +40
acc -18
jmp -158
jmp -130
acc +13
jmp -169
nop +225
acc +7
jmp -23
acc +21
acc +0
jmp +273
jmp +293
acc +39
jmp -71
acc +20
jmp +49
acc +6
jmp -60
acc +35
jmp +84
acc +14
jmp +266
acc +47
jmp -247
acc -3
acc +47
acc +23
acc +30
jmp +105
acc +18
jmp +109
jmp -188
nop -70
acc -2
acc +0
jmp +195
acc +15
jmp +246
acc +49
acc +28
jmp -18
nop +120
jmp +91
acc -15
acc +15
acc +30
jmp +39
acc +46
nop +250
acc +49
jmp -250
acc -10
acc +0
acc +39
jmp -254
nop +55
acc -4
acc -3
jmp +88
jmp +35
acc +47
nop -154
acc -16
jmp +271
nop +253
jmp -199
acc +5
acc +35
jmp +1
acc +49
jmp +234
acc +27
acc +33
acc -3
jmp -138
jmp -107
acc -11
acc +47
acc +14
jmp -288
jmp -205
acc +0
jmp +191
acc -15
jmp -116
acc +35
nop +121
acc +2
acc -14
jmp +223
acc +33
acc -10
acc +24
jmp +73
acc +39
jmp +255
acc +19
jmp -16
nop +1
jmp -177
nop +107
nop -194
jmp +260
acc -16
acc -12
jmp -148
acc +11
acc +18
acc +33
jmp +84
acc +27
acc -13
acc +36
acc +26
jmp +100
nop -110
jmp -98
acc -2
acc +29
acc +25
acc -8
jmp +128
acc +16
acc +1
acc +7
jmp -290
acc +18
nop -235
acc +0
jmp -127
acc -18
acc +38
jmp -297
acc +19
acc -8
acc +20
acc +3
jmp -230
jmp -67
jmp +124
acc -15
acc +26
acc -19
jmp +120
jmp +173
jmp -338
acc -15
jmp -309
acc +19
acc +26
acc +18
acc +8
jmp -6
acc -7
acc +10
jmp -375
acc +5
acc -16
acc +18
acc +46
jmp -309
acc +48
acc +40
nop -227
jmp -380
jmp -290
acc +46
acc +5
jmp -154
acc -9
acc +15
jmp -187
acc -10
acc +0
acc +28
acc +30
jmp -284
acc +43
acc +25
acc +14
jmp -205
acc -13
acc +1
nop -340
jmp -326
jmp +1
acc +9
acc +17
acc +1
jmp -346
jmp -158
acc +23
jmp -26
nop -257
jmp +140
acc +11
acc +10
acc +29
acc +48
jmp +177
acc +28
acc -12
acc -19
acc +37
jmp +79
acc -14
jmp -184
nop +153
jmp -170
acc -17
acc +10
acc -6
nop -174
jmp -391
jmp +148
acc +50
acc -8
jmp -426
jmp +1
acc +16
jmp +20
jmp +1
jmp -217
nop +84
jmp +71
acc +16
acc -7
acc +23
acc +24
jmp -329
acc +9
acc -7
acc -4
nop +117
jmp -16
acc +30
nop -222
acc +32
acc +9
jmp -175
acc +18
acc +15
acc +41
jmp -192
acc -3
acc +8
acc -13
acc +24
jmp -210
acc +17
acc -7
acc -19
jmp +76
acc +26
acc +2
acc +4
jmp +27
jmp -104
acc +38
acc +46
nop -67
nop +37
jmp -186
jmp +5
acc +37
acc +8
acc +30
jmp -409
acc +44
acc +4
jmp +109
nop -8
jmp -395
acc +20
acc +12
acc +16
acc +9
jmp -87
nop -406
acc -8
jmp -209
jmp -137
jmp -179
acc +44
jmp -399
nop -141
jmp +18
jmp +1
nop +55
jmp +39
acc +20
acc +40
acc +44
acc +45
jmp +74
acc -16
jmp -170
jmp -48
jmp -537
acc -9
acc +6
nop -101
acc +2
jmp -418
jmp -81
jmp +1
jmp -338
nop +43
acc +20
jmp -109
acc -1
jmp -343
acc +29
acc +11
nop -439
jmp -310
jmp -374
acc +33
nop +25
acc -16
nop -333
jmp -14
jmp -5
jmp -162
nop -432
acc +16
acc +17
jmp -87
acc -16
nop -265
acc +20
jmp -356
acc +0
jmp +5
acc +39
acc -15
jmp -325
jmp -39
nop -376
nop -116
acc +38
jmp -175
jmp -450
jmp +1
acc +19
jmp -58
nop -39
acc +40
acc +42
jmp -232
acc -14
jmp -17
acc +4
acc -9
acc +45
jmp -229
jmp -18
acc +13
acc +17
jmp -591
jmp -604
jmp -356
acc +1
acc +18
nop -52
acc +39
jmp -361
jmp -303
acc +8
nop -477
acc +3
acc -8
jmp -404
acc +24
acc +5
jmp -88
acc +27
jmp -54
jmp -18
acc +31
acc +40
acc +18
acc -16
jmp +1

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day08/input/test.txt Normal file
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nop +0
acc +1
jmp +4
acc +3
jmp -3
acc -99
acc +1
jmp -4
acc +6

156
day08/src/main.rs Normal file
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use anyhow::{anyhow, Context, Error, Result};
use std::collections::HashSet;
use std::fs::File;
use std::io::prelude::*;
use std::io::BufReader;
use std::str::FromStr;
const INPUT: &str = "input/input.txt";
#[derive(Debug, PartialEq)]
enum Operation {
Nop(i32),
Acc(i32),
Jmp(i32),
}
impl FromStr for Operation {
type Err = Error;
fn from_str(s: &str) -> Result<Self> {
let mut instruction = s.split(" ");
let op = instruction.next().context("Failed to parse operation")?;
let offset: i32 = instruction
.next()
.context("Failed to parse operation offset")?
.parse()?;
match op {
"nop" => Ok(Operation::Nop(offset)),
"acc" => Ok(Operation::Acc(offset)),
"jmp" => Ok(Operation::Jmp(offset)),
_ => Err(anyhow!("Unrecognized operation: {}", op)),
}
}
}
fn find_infinite_loop(program: &Vec<Operation>) -> i32 {
let mut accumulator: i32 = 0;
let mut pointer: i32 = 0;
let mut visited = HashSet::new();
while !visited.contains(&pointer) {
visited.insert(pointer);
match program[pointer as usize] {
Operation::Nop(_) => pointer += 1,
Operation::Acc(offset) => {
accumulator += offset;
pointer += 1;
}
Operation::Jmp(offset) => pointer += offset,
}
}
accumulator
}
fn find_terminated_value(program: &Vec<Operation>, flip_pointer: i32) -> Option<i32> {
let mut accumulator: i32 = 0;
let mut pointer: i32 = 0;
let mut visited = HashSet::new();
while !visited.contains(&pointer) {
if pointer == program.len() as i32 {
return Some(accumulator);
} else if pointer >= program.len() as i32 || pointer < 0 {
return None;
}
visited.insert(pointer);
match program[pointer as usize] {
Operation::Nop(offset) if flip_pointer == pointer => pointer += offset,
Operation::Nop(_) => pointer += 1,
Operation::Acc(offset) => {
accumulator += offset;
pointer += 1;
}
Operation::Jmp(_) if flip_pointer == pointer => pointer += 1,
Operation::Jmp(offset) => pointer += offset,
}
}
None
}
fn solve_part1(input_path: &str) -> Result<i32> {
let file = File::open(input_path)?;
let reader = BufReader::new(file);
let program: Vec<Operation> = reader
.lines()
.map(|line| Operation::from_str(&line.unwrap()).unwrap())
.collect();
Ok(find_infinite_loop(&program))
}
fn solve_part2(input_path: &str) -> Result<i32> {
let file = File::open(input_path)?;
let reader = BufReader::new(file);
let program: Vec<Operation> = reader
.lines()
.map(|line| Operation::from_str(&line.unwrap()).unwrap())
.collect();
let mut flip_pointer: i32 = 0;
while flip_pointer < program.len() as i32 {
if let Some(result) = find_terminated_value(&program, flip_pointer) {
return Ok(result);
} else {
flip_pointer += 1;
}
}
Err(anyhow!("No fix found"))
}
fn main() {
println!("Part 1: {}", solve_part1(INPUT).unwrap());
println!("Part 2: {}", solve_part2(INPUT).unwrap());
}
#[cfg(test)]
mod tests {
use super::*;
const TEST_INPUT: &str = "input/test.txt";
#[test]
fn parses_input() {
let file = File::open(TEST_INPUT).unwrap();
let reader = BufReader::new(file);
let instructions: Vec<Operation> = reader
.lines()
.map(|line| Operation::from_str(&line.unwrap()).unwrap())
.collect();
assert_eq!(
instructions,
vec![
Operation::Nop(0),
Operation::Acc(1),
Operation::Jmp(4),
Operation::Acc(3),
Operation::Jmp(-3),
Operation::Acc(-99),
Operation::Acc(1),
Operation::Jmp(-4),
Operation::Acc(6),
]
);
}
#[test]
fn solves_part1() {
assert_eq!(solve_part1(TEST_INPUT).unwrap(), 5);
}
#[test]
fn solves_part2() {
assert_eq!(solve_part2(TEST_INPUT).unwrap(), 8);
}
}