day5

day5/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "day5"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+util = { path = "../util" }

day5/data.txt

@@ -0,0 +1,219 @@
+seeds: 4106085912 135215567 529248892 159537194 1281459911 114322341 1857095529 814584370 2999858074 50388481 3362084117 37744902 3471634344 240133599 3737494864 346615684 1585884643 142273098 917169654 286257440
+
+seed-to-soil map:
+1640984363 3136305987 77225710
+3469528922 1857474741 56096642
+278465165 2901870617 105516220
+1442950910 1913571383 198033453
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+455579734 1471949813 7505801
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+2650178765 568406716 612755541
+200414015 1380201825 78051150
+2435680215 3007386837 57320801
+
+soil-to-fertilizer map:
+513693437 1166448955 406316429
+3977989337 1831898517 148449061
+2857616419 1749713256 55966993
+2245899978 767737007 398711948
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+2939801680 514501093 195967757
+4126438398 2731269124 168528898
+
+fertilizer-to-water map:
+1274667249 2789153677 35498097
+1119124697 1423189114 4201717
+1775973674 127038866 409949870
+2636872711 677641697 238584014
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+0 1427390831 607340695
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+4027094661 4141394378 153572918
+3860903206 3975202923 18402681
+1215713640 2557275684 58953609
+
+water-to-light map:
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+3890528820 1799438963 144160054
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+627354019 0 173339870
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+4046689141 2034661517 75225540
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+0 1314860140 120308793
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+2294392242 2393005045 27867003
+2361938780 2573711418 682920197
+4121914681 1989810153 44851364
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+1880529250 3489375823 172491853
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+120308793 520516204 268995757
+1590489748 3405212140 84163683
+
+light-to-temperature map:
+1711282888 1572780528 87721767
+154126417 0 43277112
+950353983 1343526858 179094373
+2607445049 2714989532 110883165
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+0 246011985 154126417
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+3556348748 1763788249 124909978
+4280381423 768227102 14585873
+528288490 1522621231 27448685
+3960151417 3116645895 320230006
+
+temperature-to-humidity map:
+2401309547 2063893326 5931150
+4081820678 1536756293 195703517
+3389837279 4114880485 97950323
+67647704 537880870 95615044
+3487787602 2069824476 16209316
+212366581 0 210367924
+0 470233166 67647704
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+1753523088 1732459810 63479835
+4277524195 3781022869 17443101
+926010074 3798465970 316414515
+511905822 210367924 31838014
+3565158997 3485152853 269845070
+3878742909 776643827 42485481
+3352296690 1795939645 37540589
+2877358153 2512426556 474938537
+1419995251 1068661114 304321846
+1348461498 705110074 71533753
+1724317097 1372982960 29205991
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+2407240697 3015035397 470117456
+1242424589 880291387 106036909
+642854491 1833480234 230413092
+3503996918 819129308 61162079
+543743836 242205938 89752078
+873267583 1015918623 52742491
+1817002923 2987365093 27670304
+1912661200 642854491 62255583
+3947253336 1402188951 134567342
+
+humidity-to-location map:
+2955816171 2260659770 927037009
+1906648752 2188942242 71717528
+848878920 35928575 8026852
+4100692468 1994667414 194274828
+2066384942 3405536067 889431229
+559945395 1052613350 288933525
+3882853180 3187696779 217839288
+856905772 1341546875 164300625
+0 528596530 524016820
+1978366280 1723924810 88018662
+1044385850 67134880 400987760
+524016820 0 35928575
+1021206397 43955427 23179453
+1445373610 468122640 60473890
+1723924810 1811943472 182723942

day5/src/main.rs

@@ -0,0 +1,7 @@
+mod part1;
+mod part2;
+
+fn main() {
+    println!("## Part 1: {} ##", part1::get_lowest_location_number());
+    println!("## Part 2: {} ##", part2::get_lowest_location_number());
+}

day5/src/part1.rs

@@ -0,0 +1,64 @@
+struct Almanac {
+    og_seeds: Vec<usize>,
+    maps: Vec<Vec<Vec<usize>>>,
+}
+
+pub fn get_lowest_location_number() -> usize {
+    let data = util::get_data("data.txt");
+
+    let almanac = format_data(data);
+
+    let mut locations = Vec::new();
+
+    for i in 0..almanac.og_seeds.len() {
+        locations.push(get_seed_location_number(
+            almanac.og_seeds[i],
+            &almanac.maps,
+            0,
+        ));
+    }
+
+    return *locations.iter().min().unwrap();
+}
+
+fn get_seed_location_number(seed: usize, maps: &Vec<Vec<Vec<usize>>>, idx: usize) -> usize {
+    let v = get_group_value(seed, &maps[idx]);
+
+    if idx < maps.len() - 1 {
+        return get_seed_location_number(v, maps, idx + 1);
+    }
+
+    return v;
+}
+
+fn get_group_value(seed: usize, group: &Vec<Vec<usize>>) -> usize {
+    // just in case stuff override other in the data
+    for i in (0..group.len()).rev() {
+        let g = &group[i];
+        if seed >= g[1] && seed <= (g[1] + g[2]) {
+            return g[0] + seed - g[1];
+        }
+    }
+
+    return seed;
+}
+
+fn format_data(data: Vec<String>) -> Almanac {
+    let mut og_seeds = Vec::new();
+    let mut maps = Vec::new();
+
+    for i in 0..data.len() {
+        if i == 0 {
+            og_seeds =
+                util::get_numbers_from_str(data[i].split(":").collect::<Vec<&str>>()[1], " ");
+        } else if data[i].contains("map:") {
+            maps.push(Vec::new());
+        } else if !data[i].contains("map:") {
+            let row = util::get_numbers_from_str(data[i].as_str(), " ");
+            let len = if maps.len() > 0 { maps.len() - 1 } else { 0 };
+            maps[len].push(row);
+        }
+    }
+
+    return Almanac { og_seeds, maps };
+}

day5/src/part2.rs

@@ -0,0 +1,146 @@
+// TODO: I believe there is a way to reduce the amount of seed values to test
+// and therefore be fast, but couldn't figure it out
+
+struct Almanac {
+    seeds: Vec<usize>,
+    seeds_ranges: Vec<[usize; 2]>,
+    maps: Vec<Vec<Vec<usize>>>,
+}
+
+impl Almanac {
+    fn seed_belongs(&self, seed: usize) -> bool {
+        for i in 0..self.seeds_ranges.len() {
+            let range = self.seeds_ranges[i];
+
+            if seed >= range[0] && seed <= range[1] {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}
+
+pub fn get_lowest_location_number() -> usize {
+    let data = util::get_data("data.txt");
+
+    let almanac = format_data(data);
+
+    let mut loc = 1000000;
+    let mut loc_found_seed = false;
+
+    while !loc_found_seed {
+        let seed = find_seed_from_loc(loc, &almanac.maps, almanac.maps.len() - 1);
+
+        if almanac.seed_belongs(seed) {
+            loc_found_seed = true;
+        } else {
+            loc += 1;
+        }
+    }
+
+    return loc;
+}
+
+fn find_seed_from_loc(value: usize, maps: &Vec<Vec<Vec<usize>>>, idx: usize) -> usize {
+    let v = get_group_seed_from_value(value, &maps[idx]);
+
+    if idx > 0 {
+        return find_seed_from_loc(v, maps, idx - 1);
+    }
+
+    return v;
+}
+
+fn get_group_seed_from_value(value: usize, group: &Vec<Vec<usize>>) -> usize {
+    for i in (0..group.len()).rev() {
+        let g = &group[i];
+
+        if value >= g[0] && value <= g[0] + g[2] - 1 {
+            return g[1] + value - g[0];
+        }
+    }
+
+    return value;
+}
+
+fn format_data(data: Vec<String>) -> Almanac {
+    let mut seeds_ranges = Vec::new();
+    let mut maps = Vec::new();
+
+    for i in 0..data.len() {
+        if i == 0 {
+            seeds_ranges = get_seeds_ranges(&data[i]);
+        } else if data[i].contains("map:") {
+            maps.push(Vec::new());
+        } else {
+            let row = util::get_numbers_from_str(data[i].as_str(), " ");
+            let len = if maps.len() > 0 { maps.len() - 1 } else { 0 };
+            maps[len].push(row);
+        }
+    }
+
+    let seeds = get_seeds_to_check(&seeds_ranges, &maps[0]);
+
+    return Almanac {
+        seeds,
+        seeds_ranges,
+        maps,
+    };
+}
+
+fn get_seeds_to_check(ranges: &Vec<[usize; 2]>, group: &Vec<Vec<usize>>) -> Vec<usize> {
+    let mut seeds = Vec::new();
+
+    for i in 0..group.len() {
+        let g = &group[i];
+        let soil_low = g[0];
+        let soil_up = g[0] + g[2] - 1;
+
+        for j in 0..ranges.len() {
+            let r = ranges[j];
+            let seed_low = r[0];
+            let seed_up = r[1];
+
+            if seed_low < soil_low && seed_up > soil_up {
+                seeds.push(seed_low);
+                seeds.push(soil_low);
+                seeds.push(soil_up + 1);
+            } else if seed_up < soil_low || seed_low > soil_up {
+                seeds.push(seed_low);
+            } else if seed_low < soil_low && seed_up > soil_low && seed_up < soil_up {
+                seeds.push(seed_low);
+                seeds.push(soil_low);
+            } else if seed_low < soil_up && seed_up > soil_up {
+                seeds.push(seed_low);
+                seeds.push(soil_up + 1);
+            } else if seed_low > soil_low && seed_up < soil_up {
+                seeds.push(seed_low);
+            }
+        }
+    }
+
+    seeds.sort();
+    seeds.dedup();
+
+    println!("seeds: {:?}", seeds);
+    return seeds;
+}
+
+fn get_seeds_ranges(s: &String) -> Vec<[usize; 2]> {
+    let ranges = util::get_numbers_from_str(s.split(":").collect::<Vec<&str>>()[1], " ");
+
+    let mut numbers = Vec::new();
+
+    let mut i = 0;
+
+    while i < ranges.len() - 1 {
+        let start = ranges[i];
+        let end = ranges[i] + ranges[i + 1] - 1;
+        numbers.push([start, end]);
+
+        i += 2;
+    }
+
+    return numbers;
+}