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2019: day14: finish

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This commit is contained in:
Antoine Martin 2019-12-15 01:28:14 +01:00
parent 03d248cf9c
commit aaaaadd901
5 changed files with 294 additions and 0 deletions
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2
aoc2019/benches/bench.rs
View file

@ -13,6 +13,7 @@ use aoc2019::day10;
use aoc2019::day11; use aoc2019::day11;
use aoc2019::day12; use aoc2019::day12;
use aoc2019::day13; use aoc2019::day13;
use aoc2019::day14;
fn aoc2019_all(c: &mut Criterion) { fn aoc2019_all(c: &mut Criterion) {
c.bench_function("day01", |b| b.iter(|| day01::run().unwrap())); c.bench_function("day01", |b| b.iter(|| day01::run().unwrap()));
@ -28,6 +29,7 @@ fn aoc2019_all(c: &mut Criterion) {
c.bench_function("day11", |b| b.iter(|| day11::run().unwrap())); c.bench_function("day11", |b| b.iter(|| day11::run().unwrap()));
c.bench_function("day12", |b| b.iter(|| day12::run().unwrap())); c.bench_function("day12", |b| b.iter(|| day12::run().unwrap()));
c.bench_function("day13", |b| b.iter(|| day13::run().unwrap())); c.bench_function("day13", |b| b.iter(|| day13::run().unwrap()));
c.bench_function("day14", |b| b.iter(|| day14::run().unwrap()));
} }
criterion_group! { criterion_group! {

62
aoc2019/input/day14.txt Normal file
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@ -0,0 +1,62 @@
4 BFNQL => 9 LMCRF
2 XGWNS, 7 TCRNC => 5 TPZCH
4 RKHMQ, 1 QHRG, 5 JDSNJ => 4 XGWNS
6 HWTBC, 4 XGWNS => 6 CWCD
1 BKPZH, 2 FLZX => 9 HWFQG
1 GDVD, 2 HTSW => 8 CNQW
2 RMDG => 9 RKHMQ
3 RTLHZ => 3 MSKWT
1 QLNHG, 1 RJHCP => 3 GRDJ
10 DLSD, 2 SWKHJ, 15 HTSW => 1 TCRNC
4 SWKHJ, 24 ZHDSD, 2 DLSD => 3 CPGJ
1 SWKHJ => 1 THJHK
129 ORE => 8 KLSMQ
3 SLNKW, 4 RTLHZ => 4 LPVGC
1 SLNKW => 5 RLGFX
2 QHRG, 1 SGMK => 8 RJHCP
9 RGKCF, 7 QHRG => 6 ZHDSD
8 XGWNS, 1 CPGJ => 2 QLNHG
2 MQFJF, 7 TBVH, 7 FZXS => 2 WZMRW
13 ZHDSD, 11 SLNKW, 18 RJHCP => 2 CZJR
1 CNQW, 5 GRDJ, 3 GDVD => 4 FLZX
129 ORE => 4 RHSHR
2 HWTBC, 2 JDSNJ => 8 QPBHG
1 BKPZH, 8 SWKHJ => 6 WSWBV
8 RJHCP, 7 FRGJK => 1 GSDT
6 QPBHG => 4 BKPZH
17 PCRQV, 6 BFNQL, 9 GSDT, 10 MQDHX, 1 ZHDSD, 1 GRDJ, 14 BRGXB, 3 RTLHZ => 8 CFGK
8 RMDG => 6 SGMK
3 CZJR => 8 RTLHZ
3 BFRTV => 7 RGKCF
6 FRGJK, 8 CZJR, 4 GRDJ => 4 BRGXB
4 VRVGB => 7 PCRQV
4 TCRNC, 1 TBVH, 2 FZXS, 1 BQGM, 1 THJHK, 19 RLGFX => 2 CRJTJ
5 RDNJK => 6 SWKHJ
2 FLVC, 2 SLNKW, 30 HWTBC => 8 DLSD
6 TBVH, 3 ZHDSD => 5 BQGM
17 RLGFX => 4 SCZQN
8 SWKHJ => 6 FZXS
9 LZHZ => 3 QDCL
2 ZHDSD => 1 RDNJK
15 FZXS, 3 TPZCH => 6 MQFJF
12 RLGFX, 9 QPBHG, 6 HTSW => 1 BFNQL
150 ORE => 9 BFRTV
2 BFRTV, 2 KLSMQ => 2 RMDG
4 VFLNM, 30 RKHMQ, 4 CRJTJ, 24 CFGK, 21 SCZQN, 4 BMGBG, 9 HWFQG, 34 CWCD, 7 LPVGC, 10 QDCL, 2 WSWBV, 2 WTZX => 1 FUEL
6 RHSHR, 3 RGKCF, 1 QHRG => 6 JDSNJ
3 MQDHX, 2 XGWNS, 12 GRDJ => 9 LZHZ
128 ORE => 6 ZBWLC
9 JDSNJ, 7 RMDG => 8 FLVC
4 DLSD, 12 CZJR, 3 MSKWT => 4 MQDHX
2 BXNX, 4 ZBWLC => 3 QHRG
19 LMCRF, 3 JDSNJ => 2 BMGBG
1 RJHCP, 26 SGMK => 9 HTSW
2 QPBHG => 8 VFLNM
2 RGKCF => 9 SLNKW
3 LZHZ, 2 GRDJ => 2 TBVH
100 ORE => 2 BXNX
4 DLSD, 21 JDSNJ => 8 GDVD
2 QHRG => 2 HWTBC
1 LPVGC, 8 XGWNS => 8 FRGJK
9 FZXS => 7 VRVGB
7 WZMRW, 1 TBVH, 1 VFLNM, 8 CNQW, 15 LZHZ, 25 PCRQV, 2 BRGXB => 4 WTZX

227
aoc2019/src/day14.rs Normal file
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@ -0,0 +1,227 @@
use std::cmp::Ordering;
use std::collections::HashMap;
use std::fmt::Write;
use aoc::err;
use aoc::Result;
const INPUT: &str = include_str!("../input/day14.txt");
pub fn run() -> Result<String> {
let mut res = String::with_capacity(128);
writeln!(res, "part 1: {}", part1(INPUT)?)?;
writeln!(res, "part 2: {}", part2(INPUT)?)?;
Ok(res)
}
fn parse_recipes(input: &str) -> Result<HashMap<String, Recipe>> {
let mut recipes = HashMap::new();
for line in input.lines() {
let arrow = line
.find(" => ")
.ok_or_else(|| err!("couldn't find arrow in line: {}", line))?;
let elems = &line[..arrow];
let elems = elems
.split(", ")
.map(|elem| {
let space = elem
.find(' ')
.ok_or_else(|| err!("couldn't find separator for elem {}", elem))?;
let amount = elem[..space].parse()?;
let name = &elem[(space + 1)..];
Ok(RecipeElem {
name: name.to_string(),
amount,
})
})
.collect::<Result<Vec<_>>>()?;
let result = &line[(arrow + 4)..].trim_end();
let space = result
.find(' ')
.ok_or_else(|| err!("couldn't find separator for result {}", result))?;
let result_amount = result[..space].parse()?;
let result_name = &result[(space + 1)..];
recipes.insert(
result_name.to_string(),
Recipe {
produced: result_amount,
elems,
},
);
}
Ok(recipes)
}
fn get_ore_cost(
material: String,
quantity: u64,
recipes: &HashMap<String, Recipe>,
inventory: &mut HashMap<String, u64>,
) -> Result<u64> {
if material == "ORE" {
return Ok(quantity);
}
let mut total = 0;
let mut in_stock = *inventory.entry(material.clone()).or_default();
if in_stock < quantity {
let recipe = recipes
.get(&material)
.ok_or_else(|| err!("couldn't find recipe for {}", material))?;
let needed = quantity - in_stock;
let num_reactions = (needed + recipe.produced - 1) / recipe.produced;
for elem in recipe.elems.iter() {
total += get_ore_cost(
elem.name.clone(),
elem.amount * num_reactions,
recipes,
inventory,
)?;
}
in_stock += num_reactions * recipe.produced;
}
inventory.insert(material.clone(), in_stock - quantity);
Ok(total)
}
fn part1(input: &str) -> Result<u64> {
let recipes = parse_recipes(input)?;
let mut inventory = HashMap::new();
get_ore_cost("FUEL".to_string(), 1, &recipes, &mut inventory)
}
fn part2(input: &str) -> Result<u64> {
let mut begin: u64 = 0;
let mut end: u64 = 1_000_000_000_000;
let recipes = parse_recipes(input)?;
while begin <= end {
let mid = begin + (end - begin) / 2;
let mut inventory = HashMap::new();
let ore_cost = get_ore_cost("FUEL".to_string(), mid, &recipes, &mut inventory)?;
match ore_cost.cmp(&1_000_000_000_000) {
Ordering::Greater => end = mid - 1,
Ordering::Less => begin = mid + 1,
Ordering::Equal => return Ok(mid),
}
}
Ok(end)
}
struct RecipeElem {
name: String,
amount: u64,
}
struct Recipe {
produced: u64,
elems: Vec<RecipeElem>,
}
#[cfg(test)]
mod tests {
use super::*;
const PROVIDED1: &str = "10 ORE => 10 A
1 ORE => 1 B
7 A, 1 B => 1 C
7 A, 1 C => 1 D
7 A, 1 D => 1 E
7 A, 1 E => 1 FUEL
";
const PROVIDED2: &str = "9 ORE => 2 A
8 ORE => 3 B
7 ORE => 5 C
3 A, 4 B => 1 AB
5 B, 7 C => 1 BC
4 C, 1 A => 1 CA
2 AB, 3 BC, 4 CA => 1 FUEL
";
const PROVIDED3: &str = "157 ORE => 5 NZVS
165 ORE => 6 DCFZ
44 XJWVT, 5 KHKGT, 1 QDVJ, 29 NZVS, 9 GPVTF, 48 HKGWZ => 1 FUEL
12 HKGWZ, 1 GPVTF, 8 PSHF => 9 QDVJ
179 ORE => 7 PSHF
177 ORE => 5 HKGWZ
7 DCFZ, 7 PSHF => 2 XJWVT
165 ORE => 2 GPVTF
3 DCFZ, 7 NZVS, 5 HKGWZ, 10 PSHF => 8 KHKGT
";
const PROVIDED4: &str = "2 VPVL, 7 FWMGM, 2 CXFTF, 11 MNCFX => 1 STKFG
17 NVRVD, 3 JNWZP => 8 VPVL
53 STKFG, 6 MNCFX, 46 VJHF, 81 HVMC, 68 CXFTF, 25 GNMV => 1 FUEL
22 VJHF, 37 MNCFX => 5 FWMGM
139 ORE => 4 NVRVD
144 ORE => 7 JNWZP
5 MNCFX, 7 RFSQX, 2 FWMGM, 2 VPVL, 19 CXFTF => 3 HVMC
5 VJHF, 7 MNCFX, 9 VPVL, 37 CXFTF => 6 GNMV
145 ORE => 6 MNCFX
1 NVRVD => 8 CXFTF
1 VJHF, 6 MNCFX => 4 RFSQX
176 ORE => 6 VJHF
";
const PROVIDED5: &str = "171 ORE => 8 CNZTR
7 ZLQW, 3 BMBT, 9 XCVML, 26 XMNCP, 1 WPTQ, 2 MZWV, 1 RJRHP => 4 PLWSL
114 ORE => 4 BHXH
14 VRPVC => 6 BMBT
6 BHXH, 18 KTJDG, 12 WPTQ, 7 PLWSL, 31 FHTLT, 37 ZDVW => 1 FUEL
6 WPTQ, 2 BMBT, 8 ZLQW, 18 KTJDG, 1 XMNCP, 6 MZWV, 1 RJRHP => 6 FHTLT
15 XDBXC, 2 LTCX, 1 VRPVC => 6 ZLQW
13 WPTQ, 10 LTCX, 3 RJRHP, 14 XMNCP, 2 MZWV, 1 ZLQW => 1 ZDVW
5 BMBT => 4 WPTQ
189 ORE => 9 KTJDG
1 MZWV, 17 XDBXC, 3 XCVML => 2 XMNCP
12 VRPVC, 27 CNZTR => 2 XDBXC
15 KTJDG, 12 BHXH => 5 XCVML
3 BHXH, 2 VRPVC => 7 MZWV
121 ORE => 7 VRPVC
7 XCVML => 6 RJRHP
5 BHXH, 4 VRPVC => 5 LTCX
";
#[test]
fn part1_provided() {
assert_eq!(part1(PROVIDED1).unwrap(), 31);
assert_eq!(part1(PROVIDED2).unwrap(), 165);
assert_eq!(part1(PROVIDED3).unwrap(), 13312);
assert_eq!(part1(PROVIDED4).unwrap(), 180697);
assert_eq!(part1(PROVIDED5).unwrap(), 2210736);
}
#[test]
fn part1_real() {
assert_eq!(part1(INPUT).unwrap(), 532506);
}
#[test]
fn part2_provided() {
assert_eq!(part2(PROVIDED3).unwrap(), 82892753);
assert_eq!(part2(PROVIDED4).unwrap(), 5586022);
assert_eq!(part2(PROVIDED5).unwrap(), 460664);
}
#[test]
fn part2_real() {
assert_eq!(part2(INPUT).unwrap(), 2595245);
}
}

1
aoc2019/src/lib.rs
View file

@ -13,3 +13,4 @@ pub mod day10;
pub mod day11; pub mod day11;
pub mod day12; pub mod day12;
pub mod day13; pub mod day13;
pub mod day14;

2
aoc2019/src/main.rs
View file

@ -14,6 +14,7 @@ use aoc2019::day10;
use aoc2019::day11; use aoc2019::day11;
use aoc2019::day12; use aoc2019::day12;
use aoc2019::day13; use aoc2019::day13;
use aoc2019::day14;
fn main() -> Result<()> { fn main() -> Result<()> {
let days: &[DayFunc] = &[ let days: &[DayFunc] = &[
@ -30,6 +31,7 @@ fn main() -> Result<()> {
day11::run, day11::run,
day12::run, day12::run,
day13::run, day13::run,
day14::run,
]; ];
aoc::run(days) aoc::run(days)