2020: day24: part 1
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@ -22,6 +22,7 @@ use aoc2020::day19;
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use aoc2020::day21;
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use aoc2020::day22;
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use aoc2020::day23;
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use aoc2020::day24;
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fn aoc2020_all(c: &mut Criterion) {
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c.bench_function("day01", |b| b.iter(|| day01::run().unwrap()));
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@ -46,6 +47,7 @@ fn aoc2020_all(c: &mut Criterion) {
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c.bench_function("day21", |b| b.iter(|| day21::run().unwrap()));
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c.bench_function("day22", |b| b.iter(|| day22::run().unwrap()));
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c.bench_function("day23", |b| b.iter(|| day23::run().unwrap()));
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c.bench_function("day24", |b| b.iter(|| day24::run().unwrap()));
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}
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criterion_group! {
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608
aoc2020/input/day24.txt
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608
aoc2020/input/day24.txt
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@ -0,0 +1,608 @@
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|
||||
wneewnewsenwsenwnewswesenwswwnewsw
|
||||
nwsesesewwnenwnwe
|
||||
nwnenwnwnwwnewenwsenenwneesenwnwnewse
|
||||
seneseswseseseswseswsewnese
|
||||
swseswswswseeswswswswnwsesesesw
|
||||
newnwseeenwnwwswnenenwnwnenwnw
|
||||
swwwnwswswswsewwswewwswwswwwnesw
|
||||
nwnenwnwnwseseneenwnwnenenwnwnwnwsewsw
|
||||
seeseseseseseseeswnwsesesesesesesenw
|
||||
sewenewnwneneewnwnwnwnwnenenwnwnenwnw
|
||||
neneneesenenwnwwneneneneneneenenwneswnw
|
||||
wwwwswswswswewwenwnwwswwwswsew
|
||||
senwwwwwwwnwwwwwwwwwweww
|
||||
sesesesesesesesesenwsesesese
|
||||
nwwnwnwnwnwnwnwnwwnwnwwnwsenwnwnww
|
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nenwnwnwnwsenwnwnesewnenwnenenwnwnwnwnenw
|
||||
nwneneeeeeeeeeeneeeeseswee
|
||||
swseswseswswswswswswswseswnwsweswswswsw
|
||||
swswswnwswswswswswseswswswswneswswswswse
|
||||
seseewsesewwnwnesenenenenenenewnenesew
|
||||
neswseswnwseswswswesesweneswnwseswnwsew
|
||||
senesewnwswwseseseseseeeneeseeese
|
||||
nwsweenwenwnwnwwnwnwwnwnwnwnwwnwswsw
|
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seseswswswnenwseswneeswswswsweseseswnw
|
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seseswseswswseseneseewseswswseswswsewse
|
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swswswwsesewswswswswwswnwwwwneswswnesw
|
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neeneswenwweeswewwseenenw
|
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nwswnwewwnwnwnwwsenwnwnwnwwnwnwnwsenww
|
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enewenwseneneswnwnesewsewnenenwneseswne
|
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seneswswseseswswesenwsesw
|
||||
nwnwnwwwnwnwwnwnewnwsenwwnwnwnwewnw
|
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nwnwnwswswwnwsenwnenwenwnwsenwnwnenwnw
|
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nwseneswnenwwnwnenenenwnenwnenene
|
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eseeneswseenwwseeeeswsesenwswwe
|
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neseeswnenwwnewsesesewsweneseeswsese
|
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seswswwseswswswsenwseseseseseeseswseswnw
|
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swnwswwnweweewwwswwwwswesww
|
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nenwsenwenwnwnwnwnwnwnwnwwnwnwnwnwnwnw
|
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swswseswneswswswsenwseswswswnwneseewswsw
|
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neneweenenenesenenene
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swneswswswswswswswswswsw
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nenenenenenenwnenenesewnenwnwnenenesenene
|
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eneeseeeeeeeeeeseeewesee
|
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seeseeseseeneseseeeseseseswese
|
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seseswenwswnwseswswswswseseeswswseseseswse
|
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nwwnwwnwnwwnwnwnwseewnwnwnwnwnw
|
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seneswswswwswswseneswswseswswswseseswsese
|
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nenenwneneneenwnwwnenwnwseneswnenenwnw
|
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seseewsenwneeneswenwnwneswenenenese
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nwnwsenenenwnwnwnwswnwnenwnwnenenwnenwne
|
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nwnwnwwenwswnwnwnwnenwnwnwwnwwnwwwsww
|
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swswnwseseseneswneneesewseenwnwsesew
|
||||
neneenwnewneswnenwnenenenwne
|
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wswswneseseswseswsesewswswseseseseseese
|
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nwnwnwnenwnwnwwnwsewswnww
|
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wwewnwwwnwwwwnwwwnwnwnwwwsw
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swsesewsewnenesenesesesesesenweswsese
|
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newnenwswnwneneweswsenenwenenwnenwese
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swswswswswwswwswswswsewswswnwswswswwe
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wswseneswnwneswnwnenenenwwsenwnenwnese
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nwnwswneswnwnenwwnenwnwenwnwnwnwwnwese
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neenenenenewneneneneneenene
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sesesesesesweseseeeseesewseewwenw
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nwnwnwnwnenwnwnwwwnwsenwnwwnweswnwnw
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nwnwnenwwwsenwnwnwnwnwnwnenwnenwnwnwnesene
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swseseseseswseseseseseswsesenwnwsesesesese
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wwwnwwnwnwnwewwnwwwewswnwww
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seswseenwseseeeweee
|
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swswswnenwseswnwseeseswneseseseneesesww
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neeneenwswesweneneswswneeneeswene
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neeeeeewseseseeeseseee
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newenwsewseweseseseseseswseseenesesee
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seseeseewenwwseeseseseewneesesewse
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wswwneswswnewswswsesesesesesenweswsw
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neseseswseseneswwswsesewseseseseswswsese
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swewswneeeseseseeeeeweeenenwe
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seenesweswsesweeeenewneneenewesw
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seeseeweseseseseseseseseseseseewsese
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swswswneseneswswswwweswseswseswswswsw
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sweeeeeeeeeneeneneeswene
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sesesesweseeseneeseseseseseseseseswene
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seewnewenwneseeeweeesweeeseene
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seneseneneneenenewneenenenenewnenene
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wnweseswswnwnweswnwenwswseeswswswswnw
|
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nwneneneeneneswneneneneneneneneneneswnenene
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nwnwnenwnwnwsenwnwswnenwnwnwnwenwnwnese
|
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nenenwneneneneneeneeneeneneneeneswne
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nenwneeseenenewsesweneenenenwneeene
|
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neneneeneeseewneeneewwe
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nwnwwnenwnwnwsenwsenwenenwnenwnwnwnwnwnw
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swesesewseswswseswswswseneneseseswnwsesw
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nwnenwnwnwnwswnwnwnwsenwnenwnwswnwwnwne
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eswwswseswsewenwnewwnewseswneswwnwsw
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swseswsesesenwseseseseswsese
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esweswnwewsenwsewse
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wsesewwwwwewnenewnwwswwwneww
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swseseswwswswseseswswneseswswsesewswneswsw
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swswswswseswseswswswswnwnwswswswseswnesw
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neseeenwnweswenwsewseseneswwswnwsww
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senwnenenweneneeneswneeneneeseeswnew
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nenwnwnenwnwnenwswsenwnenenenenwnwwnwe
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nwwnwnwwnwnwwnwnwnwnwnwnwenwwnwnw
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swswswseswswswswswnwwseswenwswseswsweswe
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wnwwwenwsewswwwwswnewwwnwwww
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nwwwnwnewsewwwwnwnwwwnwnw
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nwswweswewswswnesw
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sewsweseswswswswnwsweswswswswswswswse
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seswswswwseswswseswswswswswneswsese
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neswsenwwenwnwsenwswnenenenenw
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swweneswnwwnwwneswseswswesewwswse
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neneesenewnewneneenenewnenenenenene
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nwnwswneswseswnweee
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weswswwwewsweswswwswwwwswww
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seneeeseenwsesenwswsweesenwseeeewe
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swnwenenenenenenwsenenwnwnenesenenenwnwne
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nwnwnweswenwnwnwnwnwnwwnwswwne
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swswwswswswseswswswswsweswnwswswswesw
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nwnenwnwnwnwneswnwnenenenenenewsenenwnenw
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swnwsenwswneneneenweswseweneneneee
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sesesweswseseseswseswnwseswseseseswsese
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nwenenweneneswsesweeneneewneeene
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swswwswswnwswswswswwswseswswswnewswewsw
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sesenweseeseeeneneeseweswsesesesw
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nwsenwseeswswsewwsenenwwnwenenwswwene
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swswnwwseeneswwnwnew
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swswswseswseswswnwseswswswseeenwswswsese
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swnwneswnwwsweswseswwwnwswwswswewse
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nwnwnwnenwewnwnwnwnwnwneneswnwnwnw
|
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seseseswsesesweswseswswseneswwseswswsese
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swwweswwneswswwswwwseesenwnewse
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seswesenwnwnwneswswnewwnenwneseneenew
|
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swneneneenewneneneenwwsewneeeneswne
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nwneswnenwwswnenwsenwnwnwneenwseenenenwsw
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seseswseswseseseneswswsweswswswsewsesw
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nwewwenwswnenwseswwnwwwnewnwnwswe
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seswseswsesesweswseswsesenwsesesesesese
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swswswwwswwswewswswnewwewswwwsw
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swnesesenwewwseseeswnewnenwwenese
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swnwwseswenwsenwneseseseseseseenwsesw
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|
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seneswwwnwenwseswnwwwwwswswwene
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wneseseesenwnwseneneneswswwwwnwswenese
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nesenwnwwnesenesenenwneswnwneswnwnwnenene
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senesesesewseseseseseseseseseseesesese
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neweeeeneenenwswenesweeeswneee
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swneneenenenewnenenenwwnenwsweenenene
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nwwenwwwseswswwneswwsenewenwnwnw
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nenenwsenwnwnenwnwnenenenwnenenenwneswnw
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swnwswswsenwseneswseeseswswneseseswswnwse
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swswwseseswswneswseswswneswseseneswswsw
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weesweneseweeenesewesweneesee
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seswswswseseseseseseseneseswsesenwesese
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swwnenwswwnwnwnwnwswwswenweenwnww
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|
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sesesewneswnwnenewneseeneswnwnenweew
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eswswswsenwnwnwnewswnenwseswnenwnenee
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nwnenenenenenwnenenenenwneswsenwse
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weseseseeseseseseseseseeeenesewse
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neeneeeweeesweeswenweeswnwenw
|
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nwwwneswswwswswewewwseswswswww
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nenewnenenwnwnwnwnwnenwnwnenenesenwnwnw
|
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wneseewnwnwenwnesenwwseseswwnewnwe
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senwwsweeesenwse
|
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|
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nwnwwnwnenwnwnwnenwnwwnwsenenwsenwsenw
|
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enwwwwnwwnwnwwwnww
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wwnwnwswewneenw
|
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wnewewswwwwnwswwswswseswswwnesw
|
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wneenweweneeweseeeeseeeseee
|
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nenenenwnwnwnwnwnwswnwnewnwnenwnwnwenwne
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nwswswsenwseswnesewnwswswswswseswneswsw
|
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seeweeeeeseseseseeneseseseseswse
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sesewneseswneseeseswseesewwswsesesw
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nweneswsesenewweseswwneseneeseswswe
|
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senwseseswsesesesenwesenwsesesewesesesw
|
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eneneneeenwnwnwnwseseweneswse
|
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neswneswnenenewswnesenwnenenenenwnwnesw
|
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neswswseswswseswswseweswswseswswswswsesww
|
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neeeeeweneesw
|
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swswswswneswswswswsewswswswnwseswneswswsw
|
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wnwesweneneseseneweeesewswwwnwe
|
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wnwewwwnwnwwnwwenwsewswnwswww
|
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neeswnenwnenwsenwnenewweswsenenwnwswnw
|
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nwswnwnwwnwnwnenwnwenw
|
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swneswswswswwswswswswswswswwswswsw
|
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swnwwnenwneswneenenenenenenwseeeesesw
|
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wnwnwnwnwnwnwnwnenwnwnwnwnwswwswnwnenwnw
|
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seswswnenwseswnwsesweseseseseswseneesww
|
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seewnwnwswneweswwwenewwewsenwse
|
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swswseswswswswnwswweswseswseneseswswsw
|
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neneneeeneeseeswsweeeewneeeenw
|
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swseswseswswswneneseswneswnwne
|
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neeeneeneneneneneswnwenene
|
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swsewewnwnwnenewnewnwwseewseesese
|
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nwnwnwewnenwenwewnwnwnwnwnwswnwnwnwnw
|
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|
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sesesewswsweseseswseswswseseswswneenwnw
|
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nenenenenenenwneneneseswneneneswne
|
||||
20
aoc2020/input/day24_provided.txt
Normal file
20
aoc2020/input/day24_provided.txt
Normal file
|
|
@ -0,0 +1,20 @@
|
|||
sesenwnenenewseeswwswswwnenewsewsw
|
||||
neeenesenwnwwswnenewnwwsewnenwseswesw
|
||||
seswneswswsenwwnwse
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|
||||
swweswneswnenwsewnwneneseenw
|
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|
||||
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|
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|
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wsweesenenewnwwnwsenewsenwwsesesenwne
|
||||
neeswseenwwswnwswswnw
|
||||
nenwswwsewswnenenewsenwsenwnesesenew
|
||||
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|
||||
sweneswneswneneenwnewenewwneswswnese
|
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swwesenesewenwneswnwwneseswwne
|
||||
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|
||||
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|
||||
nenewswnwewswnenesenwnesewesw
|
||||
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|
||||
neswnwewnwnwseenwseesewsenwsweewe
|
||||
wseweeenwnesenwwwswnew
|
||||
144
aoc2020/src/day24.rs
Normal file
144
aoc2020/src/day24.rs
Normal file
|
|
@ -0,0 +1,144 @@
|
|||
use std::collections::HashSet;
|
||||
use std::fmt::Write;
|
||||
|
||||
use anyhow::{bail, Context, Result};
|
||||
|
||||
const INPUT: &str = include_str!("../input/day24.txt");
|
||||
|
||||
pub fn run() -> Result<String> {
|
||||
let mut res = String::with_capacity(128);
|
||||
|
||||
writeln!(res, "part 1: {}", part1(INPUT)?)?;
|
||||
|
||||
Ok(res)
|
||||
}
|
||||
|
||||
fn part1(input: &str) -> Result<usize> {
|
||||
let mut black_tiles = HashSet::new();
|
||||
|
||||
for line in input.lines() {
|
||||
let mut line = line;
|
||||
let mut tile_pos = HexCoordinates::default();
|
||||
|
||||
// compute tile coordinates by going through the whole line
|
||||
while !line.is_empty() {
|
||||
match line.chars().next().unwrap() {
|
||||
'e' => {
|
||||
tile_pos = tile_pos.east();
|
||||
line = &line[1..];
|
||||
}
|
||||
'w' => {
|
||||
tile_pos = tile_pos.west();
|
||||
line = &line[1..];
|
||||
}
|
||||
'n' => {
|
||||
match line
|
||||
.chars()
|
||||
.nth(1)
|
||||
.context("invalid input, missing char after `n`")?
|
||||
{
|
||||
'e' => tile_pos = tile_pos.north_east(),
|
||||
'w' => tile_pos = tile_pos.north_west(),
|
||||
other => bail!("unexpected character in input: `{}`", other),
|
||||
}
|
||||
|
||||
line = &line[2..];
|
||||
}
|
||||
's' => {
|
||||
match line
|
||||
.chars()
|
||||
.nth(1)
|
||||
.context("invalid input, missing char after `s`")?
|
||||
{
|
||||
'e' => tile_pos = tile_pos.south_east(),
|
||||
'w' => tile_pos = tile_pos.south_west(),
|
||||
other => bail!("unexpected character in input: `{}`", other),
|
||||
}
|
||||
|
||||
line = &line[2..];
|
||||
}
|
||||
other => bail!("unexpected character in input: `{}`", other),
|
||||
}
|
||||
}
|
||||
|
||||
if black_tiles.contains(&tile_pos) {
|
||||
black_tiles.remove(&tile_pos);
|
||||
} else {
|
||||
black_tiles.insert(tile_pos);
|
||||
}
|
||||
}
|
||||
|
||||
Ok(black_tiles.len())
|
||||
}
|
||||
|
||||
/// Hexagonal tile coordinate representation
|
||||
///
|
||||
/// These use the axial coordinates described here:
|
||||
///
|
||||
/// https://www.redblobgames.com/grids/hexagons/#coordinates-axial
|
||||
#[derive(Debug, Clone, Copy, Hash, PartialEq, Eq)]
|
||||
struct HexCoordinates {
|
||||
q: i64,
|
||||
r: i64,
|
||||
}
|
||||
|
||||
impl HexCoordinates {
|
||||
fn east(self) -> Self {
|
||||
Self {
|
||||
q: self.q + 1,
|
||||
r: self.r,
|
||||
}
|
||||
}
|
||||
|
||||
fn west(self) -> Self {
|
||||
Self {
|
||||
q: self.q - 1,
|
||||
r: self.r,
|
||||
}
|
||||
}
|
||||
|
||||
fn north_west(self) -> Self {
|
||||
Self {
|
||||
q: self.q,
|
||||
r: self.r - 1,
|
||||
}
|
||||
}
|
||||
|
||||
fn south_east(self) -> Self {
|
||||
Self {
|
||||
q: self.q,
|
||||
r: self.r + 1,
|
||||
}
|
||||
}
|
||||
|
||||
fn north_east(self) -> Self {
|
||||
self.north_west().east()
|
||||
}
|
||||
|
||||
fn south_west(self) -> Self {
|
||||
self.south_east().west()
|
||||
}
|
||||
}
|
||||
|
||||
impl Default for HexCoordinates {
|
||||
fn default() -> Self {
|
||||
Self { q: 0, r: 0 }
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
const PROVIDED: &str = include_str!("../input/day24_provided.txt");
|
||||
|
||||
#[test]
|
||||
fn part1_provided() {
|
||||
assert_eq!(part1(PROVIDED).unwrap(), 10);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn part1_real() {
|
||||
assert_eq!(part1(INPUT).unwrap(), 528);
|
||||
}
|
||||
}
|
||||
|
|
@ -22,3 +22,4 @@ pub mod day19;
|
|||
pub mod day21;
|
||||
pub mod day22;
|
||||
pub mod day23;
|
||||
pub mod day24;
|
||||
|
|
|
|||
|
|
@ -24,6 +24,7 @@ use aoc2020::day19;
|
|||
use aoc2020::day21;
|
||||
use aoc2020::day22;
|
||||
use aoc2020::day23;
|
||||
use aoc2020::day24;
|
||||
|
||||
fn main() -> Result<()> {
|
||||
let days: &[DayFunc] = &[
|
||||
|
|
@ -49,6 +50,7 @@ fn main() -> Result<()> {
|
|||
day21::run,
|
||||
day22::run,
|
||||
day23::run,
|
||||
day24::run,
|
||||
];
|
||||
|
||||
aoc::run(days)
|
||||
|
|
|
|||
Loading…
Reference in a new issue