~swaits/aoc2020

d0986b6f61f3f8f07123ef594b1cb4e877afb722 — Stephen Waits 2 years ago 90a7662 
day 18 solutions

Signed-off-by: Stephen Waits <swaits@amazon.com>
patch browse .tar.gz 
6 files changed, 483 insertions(+), 11 deletions(-)

M Cargo.lock
M Cargo.toml
A data/input-18.txt
A data/output-18.txt
A src/day18.rs
M src/main.rs

M Cargo.lock => Cargo.lock +61 -3
@@ 11,16 11,17 @@ dependencies = [

[[package]]
name = "anyhow"
version = "1.0.34"
version = "1.0.36"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "bf8dcb5b4bbaa28653b647d8c77bd4ed40183b48882e130c1f1ffb73de069fd7"
checksum = "68803225a7b13e47191bab76f2687382b60d259e8cf37f6e1893658b84bb9479"

[[package]]
name = "aoc2020"
version = "0.1.0"
dependencies = [
 "anyhow",
 "lazy_static",
 "once_cell",
 "peg",
 "regex",
]



@@ 37,6 38,57 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0ee1c47aaa256ecabcaea351eae4a9b01ef39ed810004e298d2511ed284b1525"

[[package]]
name = "once_cell"
version = "1.5.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "13bd41f508810a131401606d54ac32a467c97172d74ba7662562ebba5ad07fa0"

[[package]]
name = "peg"
version = "0.6.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9f76678828272f177ac33b7e2ac2e3e73cc6c1cd1e3e387928aa69562fa51367"
dependencies = [
 "peg-macros",
 "peg-runtime",
]

[[package]]
name = "peg-macros"
version = "0.6.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "636d60acf97633e48d266d7415a9355d4389cea327a193f87df395d88cd2b14d"
dependencies = [
 "peg-runtime",
 "proc-macro2",
 "quote",
]

[[package]]
name = "peg-runtime"
version = "0.6.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9555b1514d2d99d78150d3c799d4c357a3e2c2a8062cd108e93a06d9057629c5"

[[package]]
name = "proc-macro2"
version = "1.0.24"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1e0704ee1a7e00d7bb417d0770ea303c1bccbabf0ef1667dae92b5967f5f8a71"
dependencies = [
 "unicode-xid",
]

[[package]]
name = "quote"
version = "1.0.8"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "991431c3519a3f36861882da93630ce66b52918dcf1b8e2fd66b397fc96f28df"
dependencies = [
 "proc-macro2",
]

[[package]]
name = "regex"
version = "1.4.2"
source = "registry+https://github.com/rust-lang/crates.io-index"


@@ 62,3 114,9 @@ checksum = "d40c6d1b69745a6ec6fb1ca717914848da4b44ae29d9b3080cbee91d72a69b14"
dependencies = [
 "lazy_static",
]

[[package]]
name = "unicode-xid"
version = "0.2.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"


M Cargo.toml => Cargo.toml +1 -0
@@ 9,4 9,5 @@ edition = "2018"
[dependencies]
anyhow = "1.0"
once_cell = "1.5.2"
peg = "0.6.3"
regex = "1"
\ No newline at end of file


A data/input-18.txt => data/input-18.txt +371 -0
@@ 0,0 1,371 @@
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2 * (9 + 9) * 6 + 3 * (9 * 9 * 7 + 2 + 6 + 4) + 3
4 * (4 * 9 + (5 * 5 + 3 + 6 * 8) * 2) + 3 * 6
6 + (8 + 3 + (2 + 4 * 8)) * 7 + 6 * 5
(2 * 4) * 3 + 2 * (9 * 7 + 5 + 2)
3 * (5 + (3 * 4) * 6 * 2 * (3 + 6) + 4)
3 * 4 + 2 * 4 * (8 * 4) * 9
((8 * 7 + 7) * 9 * 8 + 4) + 9 * 8 * 2 + 2
3 * 2 * 6 + 4 + 6 * ((5 * 9 * 4 + 6) * 3)
(9 * 9 + 8 * 5) + 7 * 3 + (8 + 2) + (6 + 5 * 6)
4 * 2 * ((5 + 6 * 3 * 9 + 8 + 6) + 6 * (6 + 5 + 5 + 7 * 4 * 6) + 2 * 9 * 3)
8 * (4 + 7 * 3) * (4 + 6 + (2 * 2) * 6) + 6
(9 * 5 * (5 + 7 + 6 + 9 * 8 * 8) + 8 + 5) + 6 * (5 + 7) + 6 + 9
4 * ((2 * 9 + 6 * 4 + 6 * 8) * 9 * 8 * 7 * (3 * 5 * 2 + 5 * 5 + 5) * 7) + 2
7 * 8 + 6 + ((3 * 2 + 9) + 5 * 6 + (8 * 3 + 6 * 6) * (3 * 9 * 6 * 9 * 3))
3 * (7 + 2) + (4 + 4 * (3 + 2 * 2) * 3) + 9
3 * (6 + 8 + 4 + 5 * 7) * 7
3 * (5 + 2 * 6 * 9 + 4) + 3 * 5 + 5
(2 * (2 * 9 * 8 * 5) * (5 * 5) + 6 * 4 + 6) * 8 * 6 * 8 + 6 * 6
(5 * (7 + 3 + 2)) * 5 * 2
7 * 6 * 8 + 9 * 6 + (7 * (2 + 8 * 8 + 8) + 5 + 2)
2 + 6 + (5 + 5 + (7 + 6) + 5 + 4) * (7 * 2 + 3 * 9 * (5 * 8 + 5)) * 8
(6 * 5 * 5 * (2 * 8 * 4 + 2 + 8 * 8)) * 2 + 5
6 * 6 * 6 * 2 * (2 * 7 + 7 + (7 + 7 + 3 * 4 * 7) * 5) * 2
8 + (9 + 9 * (4 + 2) + 3 + 8) * 9 * 4
(7 + 9) * 3 + 2 * (2 * 8 * 6 + 7 + 8)
2 * 8 * 2 * (6 * (9 * 5) * 3 + 4)
((7 * 4 * 3 + 9 + 8 * 5) * (6 * 2 + 2) * (2 + 7 + 3) + 7 + (8 * 9) * 4) * 9 + 5 * 7 * (3 * (2 * 5 + 5 * 9 + 7 + 3))
5 + (7 * 4 + (7 + 3 + 5 * 5) * 7 * 2 * 4) + 5 + 5 + 5 * 6
2 + 6 * (2 * 7 + 4 * 2 + 8) + 7 * (9 * 6 + 5 * 9 * (8 * 8 * 5 * 7 + 3 + 2)) + 2
3 + 6 + 8 + (6 * 9 * (8 * 5 * 9 * 9 + 8 + 7) * (2 + 8 * 9)) + 2
4 * 5 * 7 + 9 + 2 + (6 * 2)
8 + 5 + (2 * 8 * 7 * 2 * 9 + 5) * 6 * 4 + 5
(4 + 9 * 4 * 8 + 7 + 8) + 9 * (5 * 2 + 8) * 9 + (7 * 7 * (6 + 7 + 5))
6 + (9 + (2 * 8 + 5) + 7 * 9) * 2
4 + (9 + 9 * 5 + 6 + 6 + 8)
(9 * 7) * 5 + 3 * 4 + (4 * 7 * 6 * 6) * 2
8 * (3 * 6) * (5 * (6 * 3 + 2) + 7 + 9 * 5 * (2 * 8)) + 6 * 3 * (4 + 5)
9 + (2 + 5 * 2 + 7 + 8 * 3) + 8 + ((5 + 7 + 4 * 8) + 5) * 6
(2 + 9 * 5) * (7 + 7 + 3 + (3 + 9 * 4) + 5)
5 * 7 * ((4 * 8) + 6 + 3 * 3 * 7 * 6) * 2 + 3
6 + 8 + 8 * 2 * (5 + 5 + 3 + (2 * 2 * 8) * 6) * 9
4 * 8 * (5 + 8 + 7 + 2 * 2 * 8) * 6 + (8 + 3) * 2
(8 + 9) * (6 + 2) * 5 + (3 * 8 * 2) + (7 + (4 + 3 * 6 + 3 + 8) + 2)
2 * ((4 + 9) + 4 * (3 * 5 + 6 * 3 + 6 + 4) + 7 + 2 * 7) * 3 * 9 * (8 * 3 + 5 * 3) * 7
((2 * 5 + 5 + 3 * 9) + 9 + 4) * 7 + 8 * 2 * 3
2 + 5 * (5 + 5 * 9 + 2 * (4 + 2) * 4) + 4 + 2
4 * 8 + (9 * 4 * 5 + 7) + 8 + (8 * 3 * 6 * 7 * 6)
8 + (8 * 2 + 3 + 5) + 3 * 4 + 8
8 + (2 + 9 + 9 * 9 + 3 + (8 + 6 + 4 + 6 + 9 * 9)) * 9 * 5 * (6 + 5 * 7 * (2 * 9) * (4 * 3 + 5)) + (7 * 2)
(3 * 7 + 5 * (9 + 6 + 5) * 5) + 7 + 8
9 + 7 + (7 * (9 + 7 + 8 * 5 + 9 * 6) + 9) + (3 + 9 + (9 + 6 + 9 + 7 * 7 * 6)) * 7 + (4 * 5 * (5 + 9 + 2))
7 + 9 + (7 * (7 + 8 + 7 + 8 * 4 * 8) + 7 + 3 + 5 * 8) * (5 + 6) + (6 * 6) * 7
2 * 8 + (9 + (2 + 6 + 7 * 7)) * 3 + 7 + (4 * 4)
(7 + 2 + 5 * (8 + 6 + 9 * 2 * 6)) * 9 * 3
6 * 9 + 4 + ((5 + 8 + 4 + 8 * 5 * 7) * 2) * 2
9 + 5 * 3 + 2 * 7 * 5
8 * 4 * ((8 * 8 + 7 + 9 + 3 + 6) + 3 + 6 + (2 + 8 * 9 + 6)) + 9 * 5 * 7
6 + 8 * 3 + (6 * 4 * (8 * 3 + 8) + 3 * 7 * (9 * 6 * 7 * 8)) + 2 * 9
6 * 3 * 5 * 3 * 5 + 6
5 + (6 * 9 * 9 * 3 + 5 * 6) + 6 * 3
((6 * 5 + 7) + 4 + 9 + (6 + 9 * 6 * 5 * 7 * 5) * 6) + ((8 * 5 * 3) + 5 * 9 + (7 * 5 + 5 * 6)) * (9 * 7 * 8) * 4
8 * ((7 + 5 + 5 * 8) * (2 * 6))
((9 + 4 + 6 + 7 * 4 + 3) * 2 * (6 * 8) + 8) + 5
3 + 2 + 8 * ((3 + 9 + 7) + 9 * 9 * (3 * 2 * 7 + 9))
8 + (5 + 2 + 3 + 4) * 4 + (8 + 6 + 9 * 4)
6 * 9 * ((3 + 7 + 8 + 7 + 6 + 9) + 3 * 5)
7 + 4 * 8 * (5 * 8 + 7) * 8 + 5
3 + 7 * 6 * 7 + (4 + 3 * 3 + 6 + 6 + 9) + 4
4 * 4 + (8 * 7 + (8 + 5 * 8 + 4) + 8 * 4 * (3 * 7 * 3))
(5 * 9 + 3 + 2) + 4 + 7
(3 * 2 + 2) + (8 * 2 * 4 + 8)
(7 * 3 * (5 + 9) * 8) * ((8 * 3 * 3 + 6 + 4) * (7 * 8 * 7 + 9 * 5)) * (7 * (6 * 8 * 5 * 5 + 6 + 5))
(6 + 5 + 8 + 8 + 2) * 7
6 * 6 + (7 * 5 * 7 * 2 + 7 + (6 + 7 * 7 + 5 + 5)) + 6 * 2 * 9
(4 + 5 * 9 + 2 * 8) * (7 * 9) * ((5 + 7 + 6 * 6 * 8 + 3) * (2 + 2 + 8) * 9) * 4 + 8 + 8
(3 * 6 + 4 * (6 + 2 * 9 + 6 * 2 + 8) + (3 * 7 + 8 * 4 + 2)) + 9 + 7 * (5 + 4) + 2 * ((6 + 4 + 8 * 5 * 6 + 2) * 2 + 9 + (3 * 7) + 9)
6 + 7 + 2 * 7 + (6 + 4 * 5) * 5
4 * (9 * 6 + 2)
5 * 3 + (8 * (4 + 5 + 5 * 9) + 2)
3 * 3 + ((4 * 5 * 4) * 9 + 2 * (8 + 7 * 6 * 5 * 8)) + 3 + 5
3 + ((2 * 5 + 8) + (2 * 6 * 5 + 9 + 7 + 8) + 7 * (9 * 9 * 4) * 8 + 6)
(7 + 4 + (9 + 5 + 7 + 6 * 9) + 4 * (6 * 7 * 7) + 2) * 3 + 3 * 6
(4 + 2 + 3 * (2 * 6 * 6 * 9)) * ((7 + 6 * 8) + 6 * 2 + (9 + 2) * (2 + 3))
2 * (6 * (7 + 5 * 8 * 4) * (9 * 8 + 8) * (9 + 6) + 9 + 2)
9 * (8 + (5 + 2)) * 7
8 + (4 * 4 + 9 * 8 + (6 + 7 * 5 + 5) + 2) * 6
(9 * (6 * 2 * 8 * 9) * 4 * 7 + 2 * 9) + 2 * 3
2 * 5 * 4 + 4 + 6 + 6
7 + 8
((5 + 4 * 2 + 7) * 2 * (2 + 4)) * (3 * 8 * 3 * 3 + 6 + 6) + 6 + 3 * 7
4 * (3 + (4 * 6 + 9 * 3) + 7 * 9 + (9 * 4 * 4))
(7 + 4 + 4 * 4) * 8 * (9 + 5) + (4 * 5 * 8) * 7
(3 + 2 * (4 + 7 + 8 * 2 + 5)) * 7 + 6 * 7 + 8
9 * 8 * (8 * 8) + 9 + 6
4 + 5 + 9 + (3 + 9 * 9 + 5 * 8 + 4)
3 + 6 + 5 + 2 * 4 * (6 * 2 + (2 + 4 + 3 + 5 + 2) + 7)
8 * 8 * 5 * ((6 * 7) + 2 * 7 + 2 + 2 + 7) * 6
2 * 8 + (7 * 4 + (5 * 7 + 6 * 2 * 4) * 8) * 7 + 3 * 7
(3 * 6 + (4 + 7)) + 8
5 * 4 * (5 * 6 * (6 + 8 + 6 + 7 * 8 + 3) * 3 + 8 * 3) + (2 * (2 + 4 + 2 * 3 + 9 * 5) + 3 * (5 + 6 * 2 * 2 + 3) + 6) * (2 * 2) + 6
5 * (7 * 5 * 2 + 7 + (8 * 3 * 6 * 8 * 8 * 2) + 2) + 4 + 6
7 + 5 * 6 + (4 * 5)
(8 * 4) * ((3 + 2 * 3 + 9 + 6 + 4) + (9 * 4) + 6 + 4) * 9
6 * 5 * (2 + (6 * 7) * 8 + 7) + (2 * (4 * 5 * 5 * 6 + 5) * 2 * 3 + (9 * 2 + 3) + 6) * 6 * 5
(8 * (2 + 9) * 6 + 6 * 8 + 4) + 2 * 2 + 2
9 + (5 * 5 * (7 + 2 * 2 + 3 * 7) + 3 + 9) + 5 + 9 * 2
(7 + 2 + 5 * 5 + 5 * (7 * 9)) * 7 + 6 * 7 + (6 + 5 * (5 * 7) * 5 * (4 + 7 + 8 * 7) + 8) + 5
(8 + 2) + 2 * 6 * 7 + ((7 + 6 * 8 * 8 + 2) * 8)
(9 + 5) + 7 * 6 * 5 + 6
(5 + 2) + (4 + 8 + 8 * 5) * (6 * 2 * 3 * 4 * (7 + 3 + 7 * 3 + 5) + 7) * 2
4 * 5 * 6 + 8 * (9 * 3)
3 + (2 + 2 * 7 * 7) * 2 * 4 + (4 * 9 + 3 * (6 + 6)) + 3
(2 + 2 + 4 + (2 * 3 + 6 + 9 * 3 + 4) * 4 * 7) + 5
5 * (2 + 2 * 5 * 2 * 7) * ((8 + 5 * 4 + 2 + 7 * 4) + 2 * 7 * 9 * 9) + (8 + 2) * (7 + 7 * 9)
4 * 3 * 7 * (7 + 2 * 3 * 3 + 9)
9 * 5 * 7 + (3 * (5 + 2 + 3) * (9 + 2 * 5 + 9 * 4 + 2) * (9 * 4 + 8))
(8 + (9 * 6 + 3 * 3) + 7 + (9 + 4 * 6 * 8) * 7 + (8 * 9 * 9 * 8)) * 9 * 2 + 2 + (5 * 5) * 4
9 + 3 + 9 + 9
(5 * 5 * 3) + 3 + (7 + 3 + 9 + 8 + 9) * 8 + 4
4 * 7 * 2
6 * 5 + 2 + (8 * (8 * 7 * 7 * 4 + 7)) * 9 * 2
((2 * 6 * 8) + (2 * 5) + 2 * (3 + 6 * 6)) * 6
9 + 7 * ((2 + 6 * 3 + 4 * 3 + 2) * (8 * 5 + 5) * 7 * 7 * 9) + 2 * 7 * 2
7 * ((3 + 2 + 2 * 2) * (3 * 6 + 4) + 9 * 4 * 7) * 2
6 * 6 + 8 + (4 * 3 * 3 + 3)
(9 * 6 + 8 + 7 + 5 + 3) * 2
6 + 6 * (3 * (8 + 8 + 2 + 9)) + (2 + (2 * 4 + 8 * 9 * 7 + 4) * (8 + 4 + 5))
9 + 2 * (9 + 5)
6 + (6 + (2 + 6 * 7) * 9 + 4)
9 * ((2 * 9 * 2 + 2) + 9 * 7)
9 * 3 * (8 + 4) * 8 * 8 + (3 + (6 + 2 * 9 * 4 * 6) * 7)
3 + 7 + 5 + 7 * (9 + 3 * (8 * 9 + 6 + 7 + 9 * 8) * 9)
5 * 6 * (4 * 5 * 4 + 6) + 6 + 6 + 2
8 * 2 + (6 + 9 * 3 + 9) + 7 + 9
3 + 2 + (2 + 9) + 7
(6 + 3 * 3 * 8 * 5) + (5 * (7 * 7 + 8) + 8 + 6 + (4 + 3 + 5 * 5) * 8) + 5 + (6 * 4) * 8 * 2
5 + 5 * 6 + 7 * (5 * (4 + 9 * 4 + 7 + 2 * 8) * 2 * 8 * 7) + 3
(7 + (9 + 5 + 9 * 4 * 5 * 6) + 8) * 3 * ((7 * 8 + 8) * 5 + 8 * (2 * 6 + 9) * 5 + 7) * 4
((5 + 6 + 5 + 3 + 6) * 6) + (8 * (8 * 2 + 3 + 9 + 3) * 7 * 7 * 2) * 7 * 3
4 * (9 + 8 * 8 + 6 + 3) + 8 + ((7 * 3 + 2 * 2 + 7) + 2 * 2) * 4
(7 + 7 * 5 + 5 + 4) + 8 + 6 * (6 * (9 + 8 + 8) + 8) + 4 + 2
(6 + 9 * 3 * (9 * 8 + 3) * (9 * 9 * 2)) * 8
4 + ((4 + 3 + 4 * 9 + 8) * 5 * 4 * 5 + 7 * 2) + (3 + 3 + (6 * 4) * 5 * 4 + 4) * 4 * ((6 * 6) + 5 + 4)


A data/output-18.txt => data/output-18.txt +2 -0
@@ 0,0 1,2 @@
31142189909908
323912478287549


A src/day18.rs => src/day18.rs +47 -0
@@ 0,0 1,47 @@
// ==== day 18

use crate::utils;
use anyhow::{anyhow, Result};

peg::parser! {
    grammar arithmetic_parser() for str {
        rule ws() = quiet!{[' ' | '\n' | '\t']+}

        rule number() -> i64
            = n:$(['0'..='9']+) { n.parse().unwrap() }

        pub rule arith_equal_precedence() -> i64 = precedence!{
            x:(@) "+" y:@ { x + y }
            x:(@) "*" y:@ { x * y }
            --
            ws()* n:number() ws()* { n }
            ws()* "(" ws()* e:arith_equal_precedence() ws()* ")" ws()* { e }
        }

        pub rule arith_addition_precedence() -> i64 = precedence!{
            x:(@) "*" y:@ { x * y }
            --
            x:(@) "+" y:@ { x + y }
            --
            ws()* n:number() ws()* { n }
            ws()* "(" ws()* e:arith_addition_precedence() ws()* ")" ws()* { e }
        }
    }
}

// main
pub fn run() -> Result<(i64, i64)> {
    let data = utils::read_file("data/input-18.txt")?;
    let answers = utils::read_i64s("data/output-18.txt")?;

    let p1 = data.lines().fold(0, |sum, line| {
        sum + arithmetic_parser::arith_equal_precedence(line).unwrap()
    });
    let p2 = data.lines().fold(0, |sum, line| {
        sum + arithmetic_parser::arith_addition_precedence(line).unwrap()
    });

    assert_eq!(p1, answers[0]);
    assert_eq!(p2, answers[1]);
    Ok((p1, p2))
}


M src/main.rs => src/main.rs +1 -8
@@ 16,16 16,9 @@ mod day13;
mod day14;
mod day15;
mod day16;
mod day18;
mod utils;

// TODO
// ====
// * clean up error handling (move to `?` inside closures)
// * templatize read_i64s()
// * build out a bit of a harness for the runner
// * add criterion benchmarking
// * figure out nicer way to organize into modules

// ==== main()

fn main() -> Result<()> {