diff options
Diffstat (limited to '2018')
| -rw-r--r-- | 2018/input/17.txt | 1361 | ||||
| -rw-r--r-- | 2018/src/day17.rs | 288 | ||||
| -rw-r--r-- | 2018/src/main.rs | 4 |
3 files changed, 1652 insertions, 1 deletions
diff --git a/2018/input/17.txt b/2018/input/17.txt new file mode 100644 index 0000000..d1a645b --- /dev/null +++ b/2018/input/17.txt @@ -0,0 +1,1361 @@ +x=533, y=1429..1441 +x=480, y=117..119 +x=421, y=1751..1772 +y=1785, x=456..458 +y=956, x=570..593 +x=507, y=473..475 +x=422, y=1342..1355 +x=515, y=529..553 +y=1056, x=529..548 +y=1168, x=519..539 +x=498, y=370..392 +x=532, y=859..879 +x=559, y=1232..1235 +y=142, x=470..478 +x=454, y=587..590 +y=170, x=563..588 +x=566, y=1663..1669 +x=423, y=1587..1612 +x=473, y=1328..1337 +x=479, y=1050..1052 +x=562, y=280..292 +y=1146, x=493..495 +y=169, x=523..546 +x=439, y=1370..1396 +x=532, y=1669..1680 +x=452, y=748..761 +x=450, y=497..509 +y=1792, x=440..464 +x=584, y=1189..1212 +y=1303, x=570..572 +y=315, x=573..589 +x=413, y=1039..1046 +x=519, y=8..22 +y=840, x=476..492 +x=564, y=1508..1523 +x=489, y=1074..1077 +y=1462, x=469..561 +x=464, y=1783..1792 +x=466, y=110..123 +x=460, y=824..828 +x=481, y=1727..1732 +x=513, y=274..301 +x=555, 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x=450..465 +x=522, y=1367..1370 +y=586, x=491..511 +x=468, y=658..671 +x=511, y=1343..1353 +x=527, y=890..901 +x=596, y=1718..1723 +x=577, y=1529..1556 +y=729, x=581..597 +x=417, y=238..242 +y=1455, x=507..526 +x=471, y=770..775 +x=450, y=951..978 +x=495, y=1146..1152 +y=1172, x=494..496 +x=553, y=676..678 +y=594, x=445..462 +y=644, x=515..533 +x=440, y=401..413 +x=477, y=1727..1732 +y=289, x=568..573 +x=453, y=1402..1408 +x=559, y=411..439 +x=569, y=803..810 +x=445, y=14..26 +x=418, y=438..451 +x=555, y=712..714 +x=503, y=573..583 +y=980, x=469..489 +x=556, y=479..490 +x=553, y=149..160 +x=480, y=907..926 +y=1377, x=496..546 +y=1011, x=523..525 +y=1098, x=455..473 +y=724, x=513..526 +x=423, y=475..483 +y=694, x=462..479 +y=1483, x=460..480 +x=415, y=316..317 +x=570, y=1298..1303 +y=1643, x=417..424 +x=538, y=859..879 +y=1443, x=434..462 +x=491, y=576..586 +x=572, y=1695..1707 +y=41, x=486..512 +x=476, y=890..901 +x=436, y=995..1010 +y=882, x=442..452 +x=522, y=1207..1215 +x=593, y=1743..1751 +x=530, y=1065..1087 +x=565, y=1117..1120 +x=565, y=369..373 +x=529, y=1028..1056 +x=498, y=810..814 +x=427, y=153..167 +y=470, x=433..451 +y=469, x=518..529 +x=512, y=1664..1666 +x=568, y=1540..1552 +x=457, y=1653..1680 +y=475, x=507..534 +x=584, y=674..700 +x=554, y=390..406 +x=576, y=1319..1332 +y=1086, x=419..428 +x=462, y=1441..1443 +x=583, y=1349..1361 +x=478, y=1264..1273 +x=502, y=1104..1114 +y=32, x=455..468 +x=531, y=1566..1590 +x=419, y=1586..1612 +x=585, y=328..332 +x=585, y=802..810 +y=1614, x=518..525 +x=449, y=275..285 +y=773, x=425..434 +x=473, y=850..853 +x=539, y=581..591 +x=502, y=1068..1081 +y=681, x=414..436 +y=1337, x=446..473 +x=562, y=1010..1020 +x=548, y=1762..1783 +y=1675, x=415..426 +y=603, x=490..493 +y=1429, x=580..583 +x=476, y=92..102 +y=1370, x=520..522 +y=991, x=576..591 +x=428, y=383..393 +y=1735, x=468..489 +x=510, y=73..85 +x=572, y=1644..1657 +x=453, y=1535..1538 +y=1205, x=533..548 +x=430, y=1751..1772 +x=444, y=231..245 +x=470, 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x=541..561 +x=413, y=1308..1311 +y=810, x=569..585 +x=457, y=304..308 +y=927, x=448..452 +x=565, y=1271..1280 +x=518, y=1388..1399 +y=1288, x=453..455 +x=566, y=929..946 +x=456, y=1046..1058 +y=942, x=544..560 +y=1519, x=458..465 +x=485, y=808..819 +y=353, x=550..559 +x=421, y=1275..1296 +x=526, y=1763..1778 +y=1417, x=580..583 +x=469, y=870..882 +x=568, y=277..289 +y=1628, x=478..494 +x=563, y=69..73 +y=1404, x=576..580 +y=175, x=502..509 +x=578, y=1507..1523 +x=414, y=680..681 +x=552, y=1480..1483 +x=504, y=1049..1060 +x=580, y=845..864 +x=445, y=1142..1166 +y=1343, x=543..545 +y=1680, x=452..457 +x=460, y=789..795 +x=438, y=1419..1437 +y=966, x=541..554 +x=562, y=447..461 +y=472, x=475..494 +x=457, y=400..410 +x=568, y=819..833 +y=401, x=533..544 +x=431, y=14..26 +x=446, y=1285..1298 +y=358, x=544..565 +y=937, x=583..586 +y=926, x=584..595 +x=488, y=1516..1518 +x=456, y=115..126 +y=1266, x=505..524 +x=442, y=558..568 +y=92, x=547..552 +x=478, y=1379..1403 +x=443, y=761..786 +x=465, y=1515..1519 +x=454, y=1765..1775 +y=204, x=488..509 +y=1399, x=513..518 +x=499, y=9..22 +y=731, x=488..490 +x=513, y=195..206 +x=479, y=1764..1775 +x=436, y=679..681 +x=439, y=1209..1234 +x=525, y=808..820 +y=1476, x=568..581 +x=494, y=1162..1172 +y=1081, x=472..480 +y=332, x=493..585 +y=1716, x=479..498 +x=456, y=849..852 +x=528, y=1302..1306 +x=535, y=1761..1783 +y=1583, x=504..520 +x=542, y=616..634 +x=526, y=1455..1459 +x=492, y=490..494 +x=486, y=273..301 +x=577, y=1724..1745 +x=499, y=1740..1755 +y=583, x=503..505 +y=1692, x=524..532 +x=475, y=384..392 +x=561, y=653..659 +x=494, y=1616..1628 +x=474, y=561..565 +x=580, y=1378..1404 +x=547, y=78..92 +x=549, y=502..527 +x=524, y=638..640 +y=1360, x=567..577 +y=242, x=417..419 +y=1355, x=422..441 +x=507, y=374..381 +x=513, y=1479..1491 +y=892, x=545..562 +x=540, y=1108..1135 +x=572, y=21..23 +x=453, y=950..962 +x=576, y=1243..1248 +x=456, y=154..166 +x=548, y=533..541 +y=1403, x=478..481 +x=489, y=800..802 +x=463, y=847..860 +y=483, x=423..425 +y=441, x=539..551 +y=44, x=425..428 +x=509, y=919..925 +y=1069, x=573..575 +y=1311, x=413..429 +x=575, y=1725..1745 +x=489, y=1723..1735 +x=556, y=1645..1657 +x=488, y=97..99 +y=245, x=444..461 +x=455, y=1288..1292 +y=1306, x=523..528 +x=445, y=910..917 +x=462, y=476..487 +x=538, y=302..314 +x=486, y=1654..1660 +x=477, y=1189..1191 +y=1751, x=589..593 +x=469, y=1670..1692 +x=541, y=908..921 +x=538, y=1480..1491 +x=558, y=81..88 +x=469, y=969..980 +y=373, x=421..441 +x=513, y=697..724 +y=1155, x=484..504 +x=538, y=617..634 +x=533, y=388..401 +x=559, y=351..353 +x=464, y=1769..1771 +x=541, y=43..58 +x=420, y=1187..1203 +x=521, y=302..314 +x=531, y=53..65 +x=506, y=34..37 +x=471, y=1050..1052 +x=490, y=1680..1693 +x=494, y=466..472 +y=861, x=510..513 +x=526, y=638..640 +x=565, y=347..358 +y=650, x=450..466 +y=592, x=548..561 +y=369, x=426..435 +x=515, y=228..235 +x=496, y=906..926 +y=1077, x=487..489 +y=678, x=553..555 +x=452, y=540..550 +y=126, x=446..456 +x=518, y=1227..1234 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y=26..32 +x=472, y=1015..1039 +y=828, x=460..463 +y=1755, x=499..508 +x=518, y=1609..1614 +x=543, y=578..580 +x=438, y=1689..1699 +y=487, x=415..433 +x=475, y=1741..1750 +y=641, x=561..567 +y=668, x=460..462 +x=543, y=1614..1640 +y=824, x=519..537 +x=513, y=850..861 +x=504, y=1688..1690 +x=499, y=246..250 +x=579, y=390..406 +x=538, y=929..946 +x=446, y=1328..1337 +x=478, y=868..878 +x=509, y=181..204 +x=559, y=1724..1742 +x=442, y=877..882 +y=1296, x=421..440 +x=443, y=1066..1079 +x=425, y=29..44 +y=268, x=586..597 +y=461, x=562..564 +x=481, y=1380..1403 +y=565, x=474..479 +x=488, y=1614..1625 +y=314, x=516..521 +x=453, y=1288..1292 +x=483, y=1513..1523 +y=189, x=433..444 +x=596, y=1350..1361 +x=550, y=1387..1389 +x=576, y=973..991 +y=285, x=449..452 +y=1041, x=484..504 +x=414, y=400..413 +x=417, y=152..167 +y=1664, x=504..512 +y=374, x=504..507 +x=484, y=357..379 +y=671, x=449..468 +y=1765, x=577..596 +x=488, y=722..731 +x=433, y=460..470 +x=593, y=934..956 +x=415, y=478..487 diff --git a/2018/src/day17.rs b/2018/src/day17.rs new file mode 100644 index 0000000..3730e60 --- /dev/null +++ b/2018/src/day17.rs @@ -0,0 +1,288 @@ +use std::io; +use std::io::BufRead; +use std::collections::{VecDeque, BinaryHeap, HashSet}; +use std::cmp; +use std::iter::{self, Iterator}; +use std::{thread, time}; + +enum Clay { + Horizontal(i32, i32, i32), // y, x1, x2 + Vertical(i32, i32, i32), // x, y1, y2 +} + +impl Clay { + fn gety<F: Fn(i32, i32) -> i32>(&self, func: &F) -> i32 { + match self { + &Clay::Horizontal(y, _, _) => y, + &Clay::Vertical(_, y1, y2) => func(y1, y2), + } + } + + fn getx<F: Fn(i32, i32) -> i32>(&self, func: &F) -> i32 { + match self { + &Clay::Horizontal(_, x1, x2) => func(x1, x2), + &Clay::Vertical(x, _, _) => x, + } + } +} + +#[derive(Copy, Clone, PartialEq, Eq)] +enum Cell { + Sand, + Clay, + Still, + Flow, + Source, +} + +impl Cell { + fn produces(&self) -> bool { + match self { + Cell::Flow => true, + Cell::Source => true, + _ => false, + } + } + + fn is_wall(&self) -> bool { + match self { + Cell::Clay => true, + Cell::Still => true, + _ => false, + } + } + + fn is_water(&self) -> bool { + match self { + Cell::Still => true, + Cell::Flow => true, + Cell::Source => true, + _ => false, + } + } + + fn print(&self) { + print!("{}", match self { + Cell::Sand => '.', + Cell::Clay => '#', + Cell::Still => '~', + Cell::Flow => '|', + Cell::Source => '+', + }); + } +} + +struct Grid { + miny: i32, minx: i32, + data: Vec<Vec<Cell>>, +} + +impl Grid { + fn new(minx: i32, maxx: i32, miny: i32, maxy: i32) -> Self { + assert!(minx <= 500 && 500 <= maxx); + assert!(miny <= 0 && 0 <= maxy); + let data = iter::repeat(vec![Cell::Sand; (maxx - minx + 1) as usize]).take((maxy - miny + 1) as usize).collect::<Vec<_>>(); + Self { miny, minx, data } + } + + fn inrange(&self, x: i32, y: i32) -> bool { + self.minx <= x && x < self.minx + self.data[0].len() as i32 + && self.miny <= y && y < self.miny + self.data.len() as i32 + } + + fn get(&self, x: i32, y: i32) -> Cell { + if self.inrange(x, y) { + self.data[(y - self.miny) as usize][(x - self.minx) as usize] + } else { + Cell::Sand + } + } + + fn set(&mut self, x: i32, y: i32, value: Cell) { + if self.inrange(x, y) { + self.data[(y - self.miny) as usize][(x - self.minx) as usize] = value; + } + } + + fn print(&self) { + for y in 0..self.data.len() { + for x in 0..self.data[0].len() { + self.data[y][x].print(); + } + println!(""); + } + } + + fn print_range(&self, y1: i32, y2: i32, hlx: i32, hly: i32) { + for y in 0..self.data.len() { + if self.miny + (y as i32) < y1 { + continue; + } + if self.miny + y as i32 >= y2 { + break; + } + for x in 0..self.data[0].len() { + if self.minx + x as i32 == hlx && self.miny + y as i32 == hly { + print!("\x1B[45m"); + } + self.data[y][x].print(); + if self.minx + x as i32 == hlx && self.miny + y as i32 == hly { + print!("\x1B[0m"); + } + } + println!(""); + } + } +} + +fn parse(line: &str) -> Clay { + let comma = line.find(',').unwrap(); + let dot = line[comma+4..].find('.').unwrap() + comma + 4; + let num1 = line[2..comma].parse().unwrap(); + let num2 = line[comma+4..dot].parse().unwrap(); + let num3 = line[dot+2..].parse().unwrap(); + if &line[..1] == "x" { + Clay::Vertical(num1, num2, num3) + } else { + Clay::Horizontal(num1, num2, num3) + } +} + +fn apply_patterns(grid: &mut Grid, (x, y): (i32, i32)) -> Vec<(i32, i32)> { + let mut res = Vec::new(); + + // P -> P + // . | + if grid.get(x, y).produces() && grid.get(x, y+1) == Cell::Sand { + grid.set(x, y+1, Cell::Flow); + res.push((x, y+1)); + } + + if grid.get(x, y).produces() && grid.get(x, y+1).is_wall() { + // P. -> P| + // W W + if grid.get(x+1, y) == Cell::Sand { + grid.set(x+1, y, Cell::Flow); + res.push((x+1, y)); + } + // .P -> |P + // W W + if grid.get(x-1, y) == Cell::Sand { + grid.set(x-1, y, Cell::Flow); + res.push((x-1, y)); + } + } + + for dx in &[-1, 1] { + // WP···PW -> W~···~W + // W···W W···W + if grid.get(x, y).produces() && grid.get(x, y+1).is_wall() && grid.get(x-dx, y).is_wall() { + let mut x2 = x + dx; + let make_still; + + loop { + if grid.get(x2, y).is_wall() { + make_still = true; + break; + } + + if !(grid.get(x2, y).produces() && grid.get(x2, y+1).is_wall()) { + make_still = false; + break; + } + + x2 += dx; + } + + if make_still { + x2 = x; + while !grid.get(x2, y).is_wall() { + grid.set(x2, y, Cell::Still); + res.push((x2, y-1)); + x2 += dx; + } + } + } + } + + res +} + +pub fn main<T: BufRead>(reader: T) -> io::Result<(String, String)> { + let input = reader.lines().map(|l| parse(&l.unwrap())).collect::<Vec<_>>(); + + let miny = input.iter().map(|c| c.gety(&cmp::min)).min().unwrap(); + let maxy = input.iter().map(|c| c.gety(&cmp::max)).max().unwrap(); + let minx = input.iter().map(|c| c.getx(&cmp::min)).min().unwrap(); + let maxx = input.iter().map(|c| c.getx(&cmp::max)).max().unwrap(); + + let mut grid = Grid::new(minx - 1, maxx + 1, cmp::min(miny, 0), maxy); + + grid.set(500, 0, Cell::Source); + + for clay in input { + match clay { + Clay::Horizontal(y, x1, x2) => { + for x in x1..x2+1 { + grid.set(x, y, Cell::Clay); + } + } + Clay::Vertical(x, y1, y2) => { + for y in y1..y2+1 { + grid.set(x, y, Cell::Clay); + } + } + } + } + + let mut queue = BinaryHeap::new(); + queue.push((0, 500)); + // let mut queue = VecDeque::new(); + // queue.push_back((500, 0)); + + let mut inqueue = HashSet::new(); + inqueue.insert((500, 0)); + + // grid.print(); + + while queue.len() > 0 { + let (my, x) = queue.pop().unwrap(); + inqueue.remove(&(my, x)); + let pos = (x, -my); + // let (x, y) = queue.pop_back().unwrap(); + // inqueue.remove(&(x, y)); + // let pos = (x, y); + + for &(x, y) in apply_patterns(&mut grid, pos).iter().filter(|&&(x, y)| grid.inrange(x, y)) { + let p = (-y, x); + // let p = (x, y); + if !inqueue.contains(&p) { + queue.push(p); + // queue.push_back(p); + inqueue.insert(p); + } + } + + // println!("\x1B[H\x1B[2J"); + // grid.print_range(pos.1 - 10, pos.1 + 10, pos.0, pos.1); + // thread::sleep(time::Duration::from_millis(50)); + // let mut line = String::new(); + // io::stdin().read_line(&mut line)?; + } + + let part1 = + (miny..maxy+1).map(|y| + (minx-1..maxx+2).map(|x| + grid.get(x, y).is_water() as i32 + ).sum::<i32>() + ).sum::<i32>(); + + let part2 = + (miny..maxy+1).map(|y| + (minx-1..maxx+2).map(|x| + (grid.get(x, y) == Cell::Still) as i32 + ).sum::<i32>() + ).sum::<i32>(); + + Ok((part1.to_string(), part2.to_string())) +} diff --git a/2018/src/main.rs b/2018/src/main.rs index 4bc8d50..21a77df 100644 --- a/2018/src/main.rs +++ b/2018/src/main.rs @@ -21,8 +21,9 @@ mod day13; mod day14; mod day15; mod day16; +mod day17; -static NUM_DAYS: i32 = 16; +static NUM_DAYS: i32 = 17; fn day_switch<T: BufRead>(day: i32, reader: T) -> io::Result<(String, String)> { match day { @@ -42,6 +43,7 @@ fn day_switch<T: BufRead>(day: i32, reader: T) -> io::Result<(String, String)> { 14 => day14::main(reader), 15 => day15::main(reader), 16 => day16::main(reader), + 17 => day17::main(reader), _ => Err(Error::new(ErrorKind::Other, "Invalid day")) } } |