diff options
| -rw-r--r-- | 2018/input/10.txt | 314 | ||||
| -rw-r--r-- | 2018/src/day10.rs | 73 | ||||
| -rw-r--r-- | 2018/src/main.rs | 4 |
3 files changed, 390 insertions, 1 deletions
diff --git a/2018/input/10.txt b/2018/input/10.txt new file mode 100644 index 0000000..c16ed31 --- /dev/null +++ b/2018/input/10.txt @@ -0,0 +1,314 @@ +position=<-20515, 20790> velocity=< 2, -2> +position=< 10476, 31130> velocity=<-1, -3> +position=< 51833, 41457> velocity=<-5, -4> +position=< 51808, -30871> velocity=<-5, 3> +position=< 20845, 41465> velocity=<-2, -4> +position=<-30848, -10200> velocity=< 3, 1> +position=< 31159, -20533> velocity=<-3, 2> +position=< 10497, 41464> velocity=<-1, -4> +position=<-51511, -10200> velocity=< 5, 1> +position=<-41170, -20542> velocity=< 4, 2> +position=< 10463, -41204> velocity=<-1, 4> +position=<-30867, -10203> velocity=< 3, 1> +position=<-41205, 41459> velocity=< 4, -4> +position=<-20534, 41459> velocity=< 2, -4> +position=< 20825, 31125> velocity=<-2, -3> +position=<-51527, 10466> velocity=< 5, -1> +position=< 51840, -51534> velocity=<-5, 5> +position=< 41459, 51798> velocity=<-4, -5> +position=<-41157, -51532> velocity=< 4, 5> +position=< 51789, -20535> velocity=<-5, 2> +position=< 41451, 10466> velocity=<-4, -1> +position=< 20785, -51538> velocity=<-2, 5> +position=< 20798, -10206> velocity=<-2, 1> +position=< 51816, -51538> velocity=<-5, 5> +position=<-10161, 20792> velocity=< 1, -2> +position=< 10457, 20794> velocity=<-1, -2> +position=<-30848, -30870> velocity=< 3, 3> +position=< 20825, 20791> velocity=<-2, -2> +position=< 51789, -10202> velocity=<-5, 1> +position=< 31126, -51540> velocity=<-3, 5> +position=<-51522, -51540> velocity=< 5, 5> +position=<-51506, -51534> velocity=< 5, 5> +position=< 41507, 31127> velocity=<-4, -3> +position=< 31174, -51536> velocity=<-3, 5> +position=< 51824, 10459> velocity=<-5, -1> +position=< 10457, 41460> velocity=<-1, -4> +position=< 41471, -41205> velocity=<-4, 4> +position=<-30880, -20533> velocity=< 3, 2> +position=< 41499, 41460> velocity=<-4, -4> +position=< 41464, 20795> velocity=<-4, -2> +position=<-30848, 41460> velocity=< 3, -4> +position=< 41459, -51532> velocity=<-4, 5> +position=<-20542, 41459> velocity=< 2, -4> +position=<-51498, 20794> velocity=< 5, -2> +position=< 31163, -10201> velocity=<-3, 1> +position=<-41203, 31127> velocity=< 4, -3> +position=< 10469, -20542> velocity=<-1, 2> +position=< 20821, -41199> velocity=<-2, 4> +position=< 41511, -30866> velocity=<-4, 3> +position=< 51785, -41203> velocity=<-5, 4> +position=< 10476, -30871> velocity=<-1, 3> +position=< 31175, -51532> velocity=<-3, 5> +position=<-10166, -20536> velocity=< 1, 2> +position=< 41485, 20799> velocity=<-4, -2> +position=< 10465, 51797> velocity=<-1, -5> +position=<-51541, -51539> velocity=< 5, 5> +position=< 31126, 31127> velocity=<-3, -3> +position=< 20801, 41464> velocity=<-2, -4> +position=<-30838, 10466> velocity=< 3, -1> +position=< 20835, -20537> velocity=<-2, 2> +position=<-30872, -51533> velocity=< 3, 5> +position=< 10484, -20541> velocity=<-1, 2> +position=< 31135, -51541> velocity=<-3, 5> +position=<-51546, 41465> velocity=< 5, -4> +position=<-51536, -41204> velocity=< 5, 4> +position=< 41511, 41465> velocity=<-4, -4> +position=<-30819, -51532> velocity=< 3, 5> +position=< 10476, -20541> velocity=<-1, 2> +position=<-20542, -51536> velocity=< 2, 5> +position=<-20495, -10208> velocity=< 2, 1> +position=< 10510, 51798> velocity=<-1, -5> +position=<-41194, -41204> velocity=< 4, 4> +position=<-20542, -51534> velocity=< 2, 5> +position=< 10508, -30871> velocity=<-1, 3> +position=<-20527, -20533> velocity=< 2, 2> +position=<-51544, -30875> velocity=< 5, 3> +position=< 31171, -41201> velocity=<-3, 4> +position=<-51522, 31125> velocity=< 5, -3> +position=< 20818, 51798> velocity=<-2, -5> +position=<-41189, 51795> velocity=< 4, -5> +position=< 20817, 31125> velocity=<-2, -3> +position=<-30827, -51535> velocity=< 3, 5> +position=< 10489, 41465> velocity=<-1, -4> +position=<-30867, -41203> velocity=< 3, 4> +position=<-41189, -20542> velocity=< 4, 2> +position=<-10209, 20799> velocity=< 1, -2> +position=< 41472, 20790> velocity=<-4, -2> +position=< 10470, 51794> velocity=<-1, -5> +position=< 31119, -51540> velocity=<-3, 5> +position=<-30832, 51791> velocity=< 3, -5> +position=< 51811, 41465> velocity=<-5, -4> +position=<-20523, 51792> velocity=< 2, -5> +position=< 10500, 41459> velocity=<-1, -4> +position=< 10476, -30866> velocity=<-1, 3> +position=<-20507, -51538> velocity=< 2, 5> +position=< 20790, 51791> velocity=<-2, -5> +position=< 41491, -20538> velocity=<-4, 2> +position=<-51496, 20795> velocity=< 5, -2> +position=<-41160, 10461> velocity=< 4, -1> +position=< 20806, -10209> velocity=<-2, 1> +position=< 31137, -30875> velocity=<-3, 3> +position=<-51546, -20540> velocity=< 5, 2> +position=< 10472, -30872> velocity=<-1, 3> +position=<-20522, 20799> velocity=< 2, -2> +position=< 51788, 41461> velocity=<-5, -4> +position=< 31126, -20542> velocity=<-3, 2> +position=<-30856, -10200> velocity=< 3, 1> +position=< 10510, -30866> velocity=<-1, 3> +position=<-51541, 51795> velocity=< 5, -5> +position=<-30853, -10200> velocity=< 3, 1> +position=<-10201, -30867> velocity=< 1, 3> +position=< 10508, -10200> velocity=<-1, 1> +position=<-10156, -20533> velocity=< 1, 2> +position=< 31143, 31132> velocity=<-3, -3> +position=<-41173, -51536> velocity=< 4, 5> +position=<-51490, -10206> velocity=< 5, 1> +position=<-41157, 10457> velocity=< 4, -1> +position=< 10484, -30868> velocity=<-1, 3> +position=< 41451, -20537> velocity=<-4, 2> +position=< 20838, 20792> velocity=<-2, -2> +position=< 10492, -51537> velocity=<-1, 5> +position=< 31121, -30875> velocity=<-3, 3> +position=<-30824, -30872> velocity=< 3, 3> +position=< 51837, -30868> velocity=<-5, 3> +position=<-41165, 20799> velocity=< 4, -2> +position=< 41491, 20791> velocity=<-4, -2> +position=< 51792, 51793> velocity=<-5, -5> +position=<-20531, -30875> velocity=< 2, 3> +position=<-41162, 10462> velocity=< 4, -1> +position=<-10201, 10461> velocity=< 1, -1> +position=< 10452, 20797> velocity=<-1, -2> +position=<-20539, 31129> velocity=< 2, -3> +position=<-20494, -30870> velocity=< 2, 3> +position=<-20522, 51798> velocity=< 2, -5> +position=<-10165, 10458> velocity=< 1, -1> +position=< 31160, -10209> velocity=<-3, 1> +position=< 10493, -20542> velocity=<-1, 2> +position=<-51525, 10459> velocity=< 5, -1> +position=<-20494, -41202> velocity=< 2, 4> +position=< 10508, -10207> velocity=<-1, 1> +position=< 31142, 20791> velocity=<-3, -2> +position=< 31118, -30867> velocity=<-3, 3> +position=< 31118, -51534> velocity=<-3, 5> +position=<-51490, -51540> velocity=< 5, 5> +position=< 10476, 51795> velocity=<-1, -5> +position=<-20543, 41457> velocity=< 2, -4> +position=<-30848, 41459> velocity=< 3, -4> +position=<-51490, -30874> velocity=< 5, 3> +position=<-51490, 31131> velocity=< 5, -3> +position=< 41483, -10200> velocity=<-4, 1> +position=< 20841, 20797> velocity=<-2, -2> +position=<-10214, 10463> velocity=< 1, -1> +position=<-20502, -10208> velocity=< 2, 1> +position=< 10495, 41465> velocity=<-1, -4> +position=<-30835, -20541> velocity=< 3, 2> +position=<-30872, 31131> velocity=< 3, -3> +position=<-51490, -30872> velocity=< 5, 3> +position=<-41196, -51532> velocity=< 4, 5> +position=< 20785, 10459> velocity=<-2, -1> +position=< 31162, -51541> velocity=<-3, 5> +position=<-41181, -10204> velocity=< 4, 1> +position=< 31119, 10458> velocity=<-3, -1> +position=< 51828, 51789> velocity=<-5, -5> +position=< 41502, 20790> velocity=<-4, -2> +position=<-51504, 31123> velocity=< 5, -3> +position=<-20542, 31126> velocity=< 2, -3> +position=< 31174, 41462> velocity=<-3, -4> +position=< 20836, -51541> velocity=<-2, 5> +position=< 51789, 20793> velocity=<-5, -2> +position=<-10198, -41208> velocity=< 1, 4> +position=<-41196, 41462> velocity=< 4, -4> +position=< 31121, 31123> velocity=<-3, -3> +position=< 41469, -10200> velocity=<-4, 1> +position=< 41459, 31125> velocity=<-4, -3> +position=< 10508, 41461> velocity=<-1, -4> +position=<-51522, 51798> velocity=< 5, -5> +position=<-51506, 51794> velocity=< 5, -5> +position=< 41504, 10461> velocity=<-4, -1> +position=<-51541, 20798> velocity=< 5, -2> +position=<-41180, 10466> velocity=< 4, -1> +position=< 20788, 31128> velocity=<-2, -3> +position=< 41499, 51796> velocity=<-4, -5> +position=< 31179, -20533> velocity=<-3, 2> +position=< 51813, 20799> velocity=<-5, -2> +position=<-41210, 10457> velocity=< 4, -1> +position=< 41456, 20798> velocity=<-4, -2> +position=< 31120, 10462> velocity=<-3, -1> +position=<-10196, 51798> velocity=< 1, -5> +position=< 51784, -51534> velocity=<-5, 5> +position=< 10476, 51794> velocity=<-1, -5> +position=< 20793, 31126> velocity=<-2, -3> +position=< 10505, -51535> velocity=<-1, 5> +position=< 20817, -30875> velocity=<-2, 3> +position=< 41491, 51797> velocity=<-4, -5> +position=<-10174, -41201> velocity=< 1, 4> +position=<-41157, 51790> velocity=< 4, -5> +position=< 41491, 51793> velocity=<-4, -5> +position=<-10209, 10459> velocity=< 1, -1> +position=<-30880, -51535> velocity=< 3, 5> +position=<-10162, 10462> velocity=< 1, -1> +position=<-10210, -10204> velocity=< 1, 1> +position=< 31166, 10462> velocity=<-3, -1> +position=< 51801, 41462> velocity=<-5, -4> +position=<-30856, 51797> velocity=< 3, -5> +position=< 10473, 20799> velocity=<-1, -2> +position=< 10471, -20542> velocity=<-1, 2> +position=<-51542, 51790> velocity=< 5, -5> +position=<-30872, 41461> velocity=< 3, -4> +position=< 31137, 31127> velocity=<-3, -3> +position=< 41483, -10200> velocity=<-4, 1> +position=<-41197, -41199> velocity=< 4, 4> +position=< 51793, 20794> velocity=<-5, -2> +position=< 31131, 41465> velocity=<-3, -4> +position=<-20515, 20798> velocity=< 2, -2> +position=<-30860, -41208> velocity=< 3, 4> +position=<-20543, -30874> velocity=< 2, 3> +position=<-41181, -41201> velocity=< 4, 4> +position=<-51497, -30870> velocity=< 5, 3> +position=< 51828, 41465> velocity=<-5, -4> +position=< 31119, 10462> velocity=<-3, -1> +position=<-51506, 51795> velocity=< 5, -5> +position=< 41475, 51792> velocity=<-4, -5> +position=<-10166, -10204> velocity=< 1, 1> +position=< 51843, 10466> velocity=<-5, -1> +position=<-41181, -10204> velocity=< 4, 1> +position=<-51514, 41460> velocity=< 5, -4> +position=<-41165, -10201> velocity=< 4, 1> +position=< 20828, 20790> velocity=<-2, -2> +position=<-10181, -41199> velocity=< 1, 4> +position=<-41205, -41201> velocity=< 4, 4> +position=<-30840, -41202> velocity=< 3, 4> +position=<-41205, 10463> velocity=< 4, -1> +position=< 51816, 41462> velocity=<-5, -4> +position=< 20793, -10209> velocity=<-2, 1> +position=<-10201, 10458> velocity=< 1, -1> +position=<-30821, 31132> velocity=< 3, -3> +position=< 41492, -20542> velocity=<-4, 2> +position=< 10453, 51794> velocity=<-1, -5> +position=<-51536, 10461> velocity=< 5, -1> +position=<-30880, -20537> velocity=< 3, 2> +position=< 41459, 20794> velocity=<-4, -2> +position=< 41502, 51789> velocity=<-4, -5> +position=< 20841, -51532> velocity=<-2, 5> +position=<-20515, 51792> velocity=< 2, -5> +position=< 10470, 41456> velocity=<-1, -4> +position=<-20507, 10465> velocity=< 2, -1> +position=< 51816, 10459> velocity=<-5, -1> +position=<-41185, -51532> velocity=< 4, 5> +position=<-51541, 41462> velocity=< 5, -4> +position=< 31137, -30871> velocity=<-3, 3> +position=<-30819, -41199> velocity=< 3, 4> +position=<-30877, 41461> velocity=< 3, -4> +position=<-30840, 41458> velocity=< 3, -4> +position=<-10170, 31132> velocity=< 1, -3> +position=<-30848, 51789> velocity=< 3, -5> +position=<-20534, 10457> velocity=< 2, -1> +position=< 31134, -20535> velocity=<-3, 2> +position=<-20507, 20796> velocity=< 2, -2> +position=<-30848, -41201> velocity=< 3, 4> +position=< 31126, -20540> velocity=<-3, 2> +position=< 31168, -20537> velocity=<-3, 2> +position=< 20789, -10204> velocity=<-2, 1> +position=< 20793, 20790> velocity=<-2, -2> +position=< 51792, -51538> velocity=<-5, 5> +position=<-41208, -30870> velocity=< 4, 3> +position=< 20788, -10204> velocity=<-2, 1> +position=<-41173, 51792> velocity=< 4, -5> +position=<-51514, -20534> velocity=< 5, 2> +position=<-20499, -30871> velocity=< 2, 3> +position=< 31139, -20542> velocity=<-3, 2> +position=< 10464, 41460> velocity=<-1, -4> +position=< 10511, -51532> velocity=<-1, 5> +position=< 10497, -30867> velocity=<-1, 3> +position=< 20833, 10459> velocity=<-2, -1> +position=< 31131, -30875> velocity=<-3, 3> +position=<-20534, 10465> velocity=< 2, -1> +position=<-51546, -10205> velocity=< 5, 1> +position=<-10161, -41200> velocity=< 1, 4> +position=<-30864, 41464> velocity=< 3, -4> +position=<-41165, 51797> velocity=< 4, -5> +position=<-30840, 41463> velocity=< 3, -4> +position=<-30827, -30868> velocity=< 3, 3> +position=< 20841, -20536> velocity=<-2, 2> +position=< 10479, 41465> velocity=<-1, -4> +position=<-41169, 41456> velocity=< 4, -4> +position=< 20826, 51789> velocity=<-2, -5> +position=<-30867, 51789> velocity=< 3, -5> +position=< 31167, -20541> velocity=<-3, 2> +position=< 10473, -30866> velocity=<-1, 3> +position=< 10505, 51792> velocity=<-1, -5> +position=<-51525, 31124> velocity=< 5, -3> +position=<-10182, -10207> velocity=< 1, 1> +position=<-41189, 20793> velocity=< 4, -2> +position=<-10198, 10465> velocity=< 1, -1> +position=<-20528, -51541> velocity=< 2, 5> +position=<-30860, -41208> velocity=< 3, 4> +position=< 51840, 41462> velocity=<-5, -4> +position=<-10158, -41200> velocity=< 1, 4> +position=<-30867, 20797> velocity=< 3, -2> +position=<-10162, 10462> velocity=< 1, -1> +position=<-30827, -10205> velocity=< 3, 1> +position=<-30844, 20799> velocity=< 3, -2> +position=<-51527, 51798> velocity=< 5, -5> +position=< 41501, -41208> velocity=<-4, 4> +position=< 10505, -10200> velocity=<-1, 1> +position=< 10452, -20536> velocity=<-1, 2> +position=< 31146, -51532> velocity=<-3, 5> +position=<-30867, -41206> velocity=< 3, 4> +position=< 51824, -41207> velocity=<-5, 4> +position=< 10460, -51536> velocity=<-1, 5> +position=< 31170, -51536> velocity=<-3, 5> +position=<-20521, -41199> velocity=< 2, 4> +position=< 10457, -10204> velocity=<-1, 1> +position=<-41165, -10203> velocity=< 4, 1> diff --git a/2018/src/day10.rs b/2018/src/day10.rs new file mode 100644 index 0000000..28da8de --- /dev/null +++ b/2018/src/day10.rs @@ -0,0 +1,73 @@ +use std::io; +use std::io::BufRead; +use std::collections::HashSet; + +fn parse_pt(l: &str) -> ((i32, i32), (i32, i32)) { + let i1 = l.find('<').unwrap(); + let i2 = l[i1..].find(',').unwrap() + i1; + let i3 = l[i2..].find('>').unwrap() + i2; + let i4 = l[i3..].find('<').unwrap() + i3; + let i5 = l[i4..].find(',').unwrap() + i4; + let i6 = l[i5..].find('>').unwrap() + i5; + + let s1 = &l[i1+1..i2]; + let s2 = &l[i2+1..i3]; + let s3 = &l[i4+1..i5]; + let s4 = &l[i5+1..i6]; + + ((s1.trim().parse().unwrap(), s2.trim().parse().unwrap()), + (s3.trim().parse().unwrap(), s4.trim().parse().unwrap())) +} + +pub fn main<T: BufRead>(reader: T) -> io::Result<(String, String)> { + let dots: Vec<((i32, i32), (i32, i32))> = + reader.lines().map(|l| l.unwrap()) + .map(|l| parse_pt(&l)) + .collect(); + + let mut pts: Vec<_> = dots.iter().map(|&(xy, _)| xy).collect(); + let vels: Vec<_> = dots.iter().map(|&(_, v)| v).collect(); + + let mut maxscore = -1; + let mut maxat = (-1, vec![], HashSet::new()); + for iter in 0..20000 { + let mut has_dot: HashSet<(i32, i32)> = HashSet::new(); + let mut score = 0; + for &xy in &pts { + if has_dot.contains(&xy) { score += 1; } + has_dot.insert(xy); + } + + if score > maxscore { + maxscore = score; + maxat = (iter, pts.clone(), has_dot.clone()); + if maxscore > dots.len() as i32 / 2 { + break; + } + } + + for i in 0..dots.len() { + pts[i].0 += vels[i].0; + pts[i].1 += vels[i].1; + } + } + + let mut part1 = String::new(); + + let part2 = maxat.0.to_string(); + let pts = maxat.1; + let has_dot = maxat.2; + let minx = pts.iter().map(|&(x, _)| x).min().unwrap(); + let miny = pts.iter().map(|&(_, y)| y).min().unwrap(); + let maxx = pts.iter().map(|&(x, _)| x).max().unwrap(); + let maxy = pts.iter().map(|&(_, y)| y).max().unwrap(); + for y in miny..maxy+1 { + if y != miny { part1 += "\n"; } + for x in minx..maxx + 1 { + if has_dot.contains(&(x, y)) { part1 += "#"; } + else { part1 += "."; } + } + } + + Ok((part1, part2)) +} diff --git a/2018/src/main.rs b/2018/src/main.rs index 70e7a79..3e9756b 100644 --- a/2018/src/main.rs +++ b/2018/src/main.rs @@ -14,8 +14,9 @@ mod day6; mod day7; mod day8; mod day9; +mod day10; -static NUM_DAYS: i32 = 9; +static NUM_DAYS: i32 = 10; fn day_switch<T: BufRead>(day: i32, reader: T) -> io::Result<(String, String)> { match day { @@ -28,6 +29,7 @@ fn day_switch<T: BufRead>(day: i32, reader: T) -> io::Result<(String, String)> { 7 => day7::main(reader), 8 => day8::main(reader), 9 => day9::main(reader), + 10 => day10::main(reader), _ => Err(Error::new(ErrorKind::Other, "Invalid day")) } } |