2023 day5: add data

2023/data/day5.expected

@@ -0,0 +1,2 @@
+214922730
+148041808

2023/data/day5.input

@@ -0,0 +1,250 @@
+seeds: 3640772818 104094365 1236480411 161072229 376099792 370219099 1590268366 273715765 3224333694 68979978 2070154278 189826014 3855332650 230434913 3033760782 82305885 837883389 177854788 2442602612 571881366
+
+seed-to-soil map:
+496269031 1203272644 52136246
+548405277 496269031 457095898
+1005501175 953364929 249907715
+
+soil-to-fertilizer map:
+217408321 2086205436 25053699
+2604208456 1670861921 31003781
+1631572552 0 258383552
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+0 3286160975 113381312
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+3533868176 258383552 79140402
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+1383034740 337523954 248537812
+2825901284 2659570395 55274212
+599866905 1819919838 266285598
+
+fertilizer-to-water map:
+3950520280 1751042330 139651634
+936578795 3912173308 42397072
+3553681000 1722281506 28760824
+697953317 651809140 90189394
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+2088806649 3661533238 57518373
+1744844373 2995639597 47992319
+2032719854 1694355556 27925950
+595020242 528938542 53580044
+
+water-to-light map:
+556810106 840812947 14926117
+2598413684 2184905392 114045192
+2130064037 1600958027 248227533
+1271028210 1253957270 39538107
+3521286912 4262821917 32145379
+1930562940 1944404618 64932992
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+1109026743 279496091 162001467
+725777554 2565853410 3969864
+2712458876 1330352326 185715465
+4039742261 3173278185 129442206
+0 2064417497 120487895
+299311037 855739064 257499069
+729747418 1849185560 95219058
+1373001379 767226476 66231296
+571736223 688212171 79014305
+1878676528 2890412515 51886412
+2898174341 682278717 5933454
+1781236499 441497558 97440029
+3090089298 3673052565 50139248
+1365646204 833457772 7355175
+1738475707 2412172480 42760792
+1995495932 2569823274 134568105
+3193548680 3476912261 196140304
+824966476 538937587 143341130
+3553432291 3723191813 486309970
+3140228546 4209501783 53320134
+968307606 1113238133 140719137
+4169184467 3090089298 83188887
+650750528 204469065 75027026
+1439232675 2704391379 186021136
+2511835025 1516067791 84890236
+1625253811 2298950584 113221896
+3389688984 3345314333 131597928
+2378291570 0 22623317
+2596725261 2942298927 1688423
+1310566317 2009337610 55079887
+2940964744 201446459 3022606
+120487895 22623317 178823142
+2904107795 1293495377 36856949
+2400914887 2454933272 110920138
+
+light-to-temperature map:
+1244459013 624435822 80444775
+2608592263 3309263777 172991510
+3165402867 2278806547 335097905
+292819381 1643978777 105413752
+704475267 462426854 15399493
+3696584161 2678497330 345840247
+2891254573 3613542439 34162874
+1894523870 281665589 180761265
+1706897891 1456352798 187625979
+398233133 1877125477 198159658
+4176101046 3482255287 104541624
+2278806547 3662029939 329785716
+3500500772 4098883907 196083389
+4280642670 3647705313 14324626
+4149492660 3024337577 11203522
+85784517 0 207034864
+2925417447 3231118601 78145176
+0 1749392529 85784517
+4160696182 3215713737 15404864
+4042424408 3991815655 107068252
+1129076520 207034864 74630725
+596392791 1348270322 108082476
+3100809989 2613904452 64592878
+1326100451 1114082357 234187965
+2864509045 3586796911 26745528
+2781583773 3132788465 82925272
+1560288416 477826347 146609475
+3003562623 3035541099 97247366
+719874760 704880597 409201760
+1324903788 1875928814 1196663
+1203707245 1835177046 40751768
+
+temperature-to-humidity map:
+2622049454 736812858 79169969
+3979548277 2854489162 116161222
+0 2175018874 84480806
+567798788 2400631546 48501534
+3627076350 2837901836 16587326
+1459224370 1289368272 21397154
+3018037189 3252694507 93925363
+4095709499 4063232797 21404553
+1675574530 2560175285 695067
+650203851 328659590 327259736
+3143763337 3475937023 49576
+1591893253 2091337597 83681277
+3655324442 3516768137 39649206
+1125784995 2259499680 94582805
+1082589333 280432563 43195662
+1676269597 1011614859 3965286
+3955996260 4039680780 23552017
+2701219423 684725863 52086995
+977463587 2387091631 13539915
+3643663676 3346619870 11660766
+3143812913 3556417343 483263437
+2907111949 3358280636 110925240
+2293944099 2615629615 132579811
+991003502 920029028 91585831
+1513630670 1015580145 78262583
+196718861 1310765426 316320664
+1680234883 1638774240 331394507
+2011629390 815982827 1882146
+2874635247 4084637350 32476702
+3701704795 2998403042 254291465
+2426523910 1093842728 195525544
+2837901836 3475986599 8980753
+3694973648 3469205876 6731147
+3111962552 3484967352 31800785
+616300322 662956301 21769562
+1220367800 1627086090 10492300
+1480621524 2354082485 33009146
+2846882589 2970650384 27752658
+1352028950 323628225 5031365
+2753306418 655919326 7036975
+513039525 2560870352 54759263
+84480806 1637578390 1195850
+2013511536 0 280432563
+85676656 2449133080 111042205
+1357060315 817864973 102164055
+638069884 2748209426 12133967
+1230860100 1970168747 121168850
+
+humidity-to-location map:
+3071447765 3790677895 35519893
+501148922 1470714761 60946444
+949413779 3960084356 1114317
+2276139972 547813284 42132370
+261623667 0 220957931
+0 220957931 207965683
+2629055810 2988733812 367963097
+936813255 2507216386 12600524
+3106967658 2402339659 33240399
+909841910 3356696909 11084951
+1030029700 920191219 341387512
+2503236334 3572469232 125819476
+1371417212 1666455982 273052538
+2997018907 3367781860 25674024
+3311094548 2519816910 468916902
+2021404744 1531661205 83389724
+3140208057 1939508520 59879232
+259387264 428923614 2236403
+950528096 1334878052 79501604
+2446901229 1414379656 56335105
+1644469750 3393455884 140294896
+3022692931 3698288708 48754834
+4042169428 1999387752 252797868
+1805974329 3981490698 215430415
+1784764646 501148922 21209683
+889549885 3961198673 20292025
+3780011450 522358605 10399946
+2104794468 1261578731 73299321
+3790411396 3842084182 118000174
+2318272342 2252185620 113574154
+4003450976 3533750780 38718452
+2178093789 4196921113 98046183
+3908411570 3747043542 43634353
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+2431846496 532758551 15054733
+920926861 3826197788 15886394
+3952045923 1615050929 51405053
+207965683 431160017 51421581
+633731694 2365759774 36579885
+670311579 700952913 219238306
+3200087289 589945654 111007259

2023/day5/rust/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "rust_2023_05"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+aoc = { path = "../../../common/rust" }

2023/day5/rust/src/main.rs

@@ -0,0 +1,163 @@
+#![warn(clippy::pedantic)]
+
+use std::{io::stdin, ops::ControlFlow};
+
+use aoc::{SectionRange, UpToTwo};
+
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]
+struct MapRange {
+    source: SectionRange<usize>,
+    dest_start: usize,
+}
+
+impl MapRange {
+    /// Returns overlapping (mapped) and non-overlapping (unmapped) ranges
+    pub fn map(
+        &self,
+        source_range: SectionRange<usize>,
+    ) -> (Option<SectionRange<usize>>, UpToTwo<SectionRange<usize>>) {
+        if let Some(overlap) = self.source & source_range {
+            let non_overlapping = source_range - overlap;
+            let overlap_offset = overlap
+                .offset_by_neg(*self.source.start())
+                .offset_by(self.dest_start);
+
+            (Some(overlap_offset), non_overlapping)
+        } else {
+            (None, UpToTwo::One(source_range))
+        }
+    }
+
+    pub fn parse(s: &str) -> Self {
+        let &[dest_start, source_start, len] = s
+            .split(' ')
+            .map(|n| n.parse().unwrap())
+            .collect::<Vec<_>>()
+            .as_slice()
+        else {
+            panic!("Invalid input: {s}");
+        };
+
+        Self {
+            source: SectionRange::try_new(source_start, source_start + len - 1).unwrap(),
+            dest_start,
+        }
+    }
+}
+
+struct IdMapping {
+    ranges: Vec<MapRange>,
+}
+
+impl IdMapping {
+    pub fn new(ranges: Vec<MapRange>) -> Self {
+        for window in ranges.windows(2) {
+            let [first, second] = window else { panic!() };
+            assert!(
+                (first.source & second.source).is_none(),
+                "source ranges overlap"
+            );
+        }
+        Self { ranges }
+    }
+
+    pub fn map(&self, source_range: SectionRange<usize>) -> Vec<SectionRange<usize>> {
+        let result = self.ranges.iter().try_fold(
+            (vec![], vec![source_range]),
+            |(mut mapped, unmapped), range| {
+                if unmapped.is_empty() {
+                    return ControlFlow::Break(mapped);
+                }
+
+                let mut remaining_unmapped = Vec::new();
+                for non_mapped in unmapped {
+                    let (overlapping, non_overlapping) = range.map(non_mapped);
+                    mapped.extend(overlapping);
+                    remaining_unmapped.extend(non_overlapping);
+                }
+                ControlFlow::Continue((mapped, remaining_unmapped))
+            },
+        );
+        match result {
+            ControlFlow::Continue((mut mapped, unmapped)) => {
+                // unmapped ranges stay as-is
+                mapped.extend(unmapped);
+                mapped
+            }
+            ControlFlow::Break(mapped) => mapped,
+        }
+    }
+}
+
+fn map_ranges_once(
+    ranges: &[SectionRange<usize>],
+    mapping: &IdMapping,
+) -> Vec<SectionRange<usize>> {
+    ranges
+        .iter()
+        .flat_map(|&range| mapping.map(range))
+        .collect()
+}
+
+fn map_ranges_completely(
+    init_ranges: Vec<SectionRange<usize>>,
+    mappings: &[IdMapping],
+) -> Vec<SectionRange<usize>> {
+    mappings
+        .iter()
+        .fold(init_ranges, |ranges, map| map_ranges_once(&ranges, map))
+}
+
+fn minimum_result(init_ranges: Vec<SectionRange<usize>>, mappings: &[IdMapping]) -> usize {
+    *map_ranges_completely(init_ranges, mappings)
+        .iter()
+        .min()
+        .unwrap()
+        .start()
+}
+
+fn main() {
+    let mut lines = stdin().lines().map(Result::unwrap);
+
+    let seeds: Vec<usize> = lines
+        .next()
+        .unwrap()
+        .split(' ')
+        .skip(1)
+        .map(|n| n.parse().unwrap())
+        .collect();
+
+    let mut maps = Vec::new();
+    while let Some(line) = lines.next() {
+        if line.is_empty() {
+            lines.next();
+            continue;
+        }
+
+        let ranges = lines
+            .by_ref()
+            .take_while(|l| !l.is_empty())
+            .map(|l| MapRange::parse(&l))
+            .collect();
+        maps.push(IdMapping::new(ranges));
+    }
+
+    let single_seeds: Vec<_> = seeds
+        .iter()
+        .map(|&seed| SectionRange::try_new(seed, seed).unwrap())
+        .collect();
+
+    println!("{}", minimum_result(single_seeds, &maps));
+
+    let seed_ranges: Vec<_> = seeds
+        .chunks(2)
+        .map(|pair| {
+            let &[start, len] = pair else {
+                panic!("Not a pair: {pair:?}");
+            };
+            SectionRange::try_new(start, start + len - 1).unwrap()
+        })
+        .collect();
+
+    println!("{}", minimum_result(seed_ranges, &maps));
+}

Cargo.lock

@@ -663,6 +663,13 @@ dependencies = [
  "enum-map",
 ]
 
+[[package]]
+name = "rust_2023_05"
+version = "0.1.0"
+dependencies = [
+ "aoc",
+]
+
 [[package]]
 name = "rustversion"
 version = "1.0.11"

Cargo.toml

@@ -29,4 +29,5 @@ members = [
 	"2022/day18/rust",
 	"2023/day1/rust",
 	"2023/day2/rust",
+	"2023/day5/rust",
 ]

common/rust/src/grid.rs

@@ -18,21 +18,19 @@ impl<T> Grid<T> {
     /// # Errors
     ///
     /// Returns an error if the given data does not match up with the dimensions.
-    #[must_use]
     pub fn from_rows(rows: Vec<Vec<T>>) -> Result<Self, Error> {
-        rows.iter().map(Vec::len).try_reduce(|l1, l2| {
-            if l2 != l1 {
-                Err(Error::BadWidth {
-                    expected: l1,
-                    got: l2,
+        let row_len = rows.get(0).map_or(0, Vec::len);
+        if let Some(err) = rows.iter().map(Vec::len).find_map(|l| {
+            (l != row_len).then_some(Error::BadWidth {
+                expected: row_len,
+                got: l,
             })
-            } else {
-                Ok(l2)
+        }) {
+            return Err(err);
         }
-        })?;
 
         Ok(Self {
-            width: rows.get(0).map_or(0, |r| r.len()),
+            width: rows.get(0).map_or(0, std::vec::Vec::len),
             height: rows.len(),
             rows,
         })
@@ -50,6 +48,7 @@ impl<T> Grid<T> {
         self.rows.iter_mut().map(|row| row.iter_mut())
     }
 
+    /*
     pub fn cols_mut(&mut self) -> impl Iterator<Item = impl Iterator<Item = &mut T>> {
         (0..self.width).map(move |i| {
             self.rows.iter_mut().map(move |r| {
@@ -59,4 +58,5 @@ impl<T> Grid<T> {
             })
         })
     }
+    */
 }

common/rust/src/section_range.rs

@@ -81,6 +81,40 @@ impl<T: Ord + Copy> SectionRange<T> {
         };
         intersection == *other
     }
+
+    /// Returns the start of the range.
+    #[must_use]
+    pub fn start(&self) -> &T {
+        &self.start
+    }
+
+    /// Returns the end of the range.
+    #[must_use]
+    pub fn end(&self) -> &T {
+        &self.end
+    }
+}
+
+impl<T: Add<Output = T> + Clone> SectionRange<T> {
+    /// Offsets both the start and end of the range by the given offset.
+    #[must_use]
+    pub fn offset_by(self, offset: T) -> SectionRange<T> {
+        Self {
+            start: self.start + offset.clone(),
+            end: self.end + offset,
+        }
+    }
+}
+
+impl<T: Sub<Output = T> + Clone> SectionRange<T> {
+    /// Offsets both the start and end of the range by the given offset in the negative direction.
+    #[must_use]
+    pub fn offset_by_neg(self, offset: T) -> SectionRange<T> {
+        Self {
+            start: self.start - offset.clone(),
+            end: self.end - offset,
+        }
+    }
 }
 
 impl<T: Ord + Copy + Sub<Output = L>, L: TryInto<usize>> SectionRange<T> {