Completed day 18

This commit is contained in:
Tyler Hallada 2020-12-19 18:20:09 -05:00
parent 0f038ae1dd
commit 77b0b1901b
4 changed files with 711 additions and 0 deletions

170
day18/Cargo.lock generated Normal file
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# It is not intended for manual editing.
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[package]
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authors = ["Tyler Hallada <tyler@hallada.net>"]
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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7 + 8 * ((9 + 8 * 6) * 8 * (4 * 2 + 3 * 7 * 9 + 6) * 2)
(8 + (2 * 8 + 6 * 9 * 6 * 4) * (5 + 5) + 6) + 7 * 8 * 8 + 5 * ((5 * 3 * 7 * 2) * 5 + 4 + (2 * 6 + 6 + 2 + 2) * 4 * 2)
6 + (9 + 8 + 5 + 7) + 3 * (7 * 6 * 5 * (2 * 8 * 7 * 5) + 3 * 5) + 3
9 * (6 * (8 + 4 * 8) + 4)
(9 + (5 * 7 * 7 * 8 + 9) + 5 + 5 * (8 * 7 + 2 + 9 + 9) * (9 + 6)) * 3 * ((8 + 3) + 8 * 4 + 2 * (8 + 6 + 4) * 4) + ((8 + 3 + 8 + 7) + 7 * 8 * (7 * 7) + 5) + 9
((3 * 4 * 9) + 2 + 8 + 5 + 2 + 3) * (6 * 8 * 8 + 6 + (4 + 6 + 8)) * 2 * 6 + 5 + 9
2 + 2 + (9 * (2 + 5 * 8 + 2 * 5 * 5) * 3)
(6 * (2 * 8 + 6 * 4 * 9 + 9) + 8) + 3 + (3 + 2 + 2 + 8 * (3 + 4 + 8 * 9 + 2 + 5)) + 3 * 7 + 5
(2 + 5) * (2 + 5) * 3 * (2 + 7 + 8) + 2 + 8
3 + 8 + (7 * 2 + (9 + 2 + 8 * 4) + 8 * 8) + 4 * (5 + (6 * 5 * 8) + 7 * 8 + 9 + 8)
9 + 4 * (4 + (5 * 3 + 7 + 8 + 7 * 4) * 6 + 8 + 9 + 9) * ((4 * 6 + 8) * 9 * 9 * 6)
8 + 7 + ((3 * 6 + 2) + (8 * 2) + 3) + 7
(6 + 4) * 9 + 9
6 * ((8 + 5) + 7 * 3 * 8 * 5 * 5) * 4 + 4
7 + ((4 + 7 * 3 * 3 + 8) * 5 * (8 + 2) * (2 + 6 + 5 * 7 * 4 * 8) + (7 + 5 + 2) + 8)
9 + 7 + (7 * 8 + 9) + 3 * 6 + 6
(5 * 9) + 5 * 2 + 8
(9 + 4 + 7) * ((9 * 7) + 9) + (3 * 9) + ((7 * 5 * 2) * (6 + 9 * 8 * 2 + 5 * 6) + 8 + 9 * 8 + (4 * 9 * 2)) + 6
4 * 8 + 7 * ((6 + 9 * 2) * (4 * 7)) + 9
8 + ((2 + 2 * 6) * 6 + 2 + 4 + 9 + 5) * 3
8 + 7
3 + 7 + (9 + 4 + (8 * 4 * 7 + 7 * 3 + 5) + (9 + 7 + 2) + 9) + 5 + 5 * 2
6 * 7 + (3 + (3 * 3) + 4 + (2 * 7 * 2 * 3) * 7 + 6)
5 * (4 + (7 * 7 + 4 * 5 * 2 + 6) * 3 + 5 + (4 * 3 + 3 + 6 * 6) * 7) + 3 + ((2 * 8 * 4 + 8) + 6 + (5 * 9 + 2 * 7) + 4 * 8) * ((3 * 5 * 3 * 9 * 7) + 5 + (3 + 9 + 9 + 2 + 5)) + (3 * 7 + 9)
(3 * 7) + 5
(2 * 5 * 6 + 6) * 2 * (9 + 3 + 6)
2 * 2 + (6 + (4 + 2) + 4 + 9 * 9) + ((9 + 3 + 6) + 2 * 3 * 5 + 3 * 3) * 8 * (2 + (6 + 3 + 2 + 9 * 6 * 6))
8 + (6 + 8 * 8 + 3 + (4 * 7 + 6 * 3 + 6 * 8) * 6)
(8 * 8 * 4) * 5 * 9 * 9 * ((9 * 2 * 8 * 2) * 4 + (2 + 2) + 8 + 9) * 4
(6 * 3 + (8 + 5 * 9 + 2 + 8) * 3 * 7 * 2) + 9 + 8 + 2
(2 * 4 * 3) * 4 + 6 + ((5 * 7 * 4) + 7 + 4 + 5)
(8 + 5 * 2 + 5 * 3 * 9) * 8 + 8 * 2 * 8 + 5
4 + (6 + 6 * 9 * 5) * (4 + 5 * 6 + 8) + 8 + 8
6 + (5 + 7) * 3 + (7 + 2 + 4 * 5 + 2 * 4) + (6 + 4 * 5 * 7 + 4 + 5) * (5 + 6 + 8 + 8 + 9)
(5 * 7) * 6 * 8 * 9 * 6 * 6
6 + 8 + 7 + 3 * (2 + 9 * 7)
3 + ((8 * 5 + 8 * 8 * 9 + 8) * 2 + 6) * 2 + (2 + 6)
6 + 6 + (3 * 7 * 8 * (3 * 4 + 2 + 2 + 3)) + ((6 * 3 + 9 + 2 + 5 * 9) * 9 + 2 * 7 * 2 + 4) + 9 + 4
9 * 8 + ((6 + 8 * 2 + 7 * 6 * 4) + 4 + 3 + 7 + 5)
((2 + 9 + 2 * 9 + 3 * 5) * 3 + 3 * 4) * 4 + 4
6 * (8 + 7 * 5 * 8 + 2 * 2) + (4 * 4 + 8 + 3) + 3 * 5
7 + (8 * 3 * (5 + 7 + 6) + (9 + 9 * 9 * 6 + 4 * 7)) * 7 + 9 + 4
6 * (9 + 7 * 6 * 5 * 8) + 5
2 * 6 * (4 + (4 * 7 * 2 + 9 * 9) * 5 + 2) + ((5 + 6) * 3) + 8 + 2
5 + 4 * 9 + (5 * (8 * 9 + 2 + 3) * 6) * 3 * 5
5 + 9 + 9 + (5 + 2 + 8) * 3 * (7 + 6 + (7 * 7 + 7 + 7) * 6 + 7 + 2)
(2 + 6 * 4 + 9 * 2 + 2) + ((3 * 8 * 6) + 2 * (9 * 5))
5 + 3 * (3 * 5 * 3 * (7 + 6 * 9 + 3 + 8 + 4) * 9) + 2 + 7 * (6 * 8 * 7)
(4 + (9 * 5 + 3 + 4 * 5) * 6 + 9 * 6) * 5 * 9
4 * (2 + 4 * 4 + (2 + 6 + 8 * 2 * 8 * 8)) * 4 * 6 + 9 + 3
(8 + 9 + 4) + 2 + ((5 * 7 * 3 * 9 + 3) * 6 + 4) * 3 + (2 * 5 * 3 * 3) + (7 + 2 * 9)
8 + (6 + 4 * 8 * (9 + 6) + 5 * (5 * 8 + 9)) + 2 * 5
7 * 5
(4 * 3 * 3) + 7 * (8 * 4 + 3 + 9 + 5 + (6 + 4 * 8 + 3 + 7)) * 6 * 9
9 * 2 * (9 * 9 + 4 + 2 * 9) * (3 + 5 + 8)
3 + (3 + 6 + 8 + 3 * 7) + 6 + (8 + 7 + 5 + (4 + 8 + 5 + 4)) * 6
7 * 2 + 3 + 8 + 2
9 * 6 * 5 * 9 * (3 * (8 + 9 + 5) * (5 + 3 + 8) + 5) + 5
6 + 6 + ((6 + 2 * 7 + 5 + 3) + 4 * (8 * 4 * 2 * 2 + 7)) + 8 + 5 + 3
9 + (2 * 7 * 4 * 5 + 6 + 4) * 5 * 2
7 + ((2 * 4 + 2 + 4 + 3 + 3) * 9 + 5 + 6)
2 * 9 * 8 * (5 + (4 + 5 + 2 + 7))
2 * 6 * 4
(8 * (9 * 6 * 9 * 2 + 4) * 6 + 7 * 6) * 6
8 * (3 * 3 * 4 + 8) * 8 * 7
(8 * 3 * 8 * 8 + 4 + 8) + 4 * (9 * 3) * 7
((8 * 9 + 2 * 4) * (4 + 3 + 8 + 9 + 8) * (3 * 8 + 7) + 6 * 3) + 5
2 + (8 * 9 * (7 + 6) * (4 + 7 + 7 + 7))
4 + (8 + 6 + (8 + 6 * 6 + 7 * 9) + (3 + 6 * 5 * 6)) + 5 * 8 * 7 * 9
(7 * 7 + 8 * 4 + 4) * 3 + 2 * 4 + 5 * (4 * 7)
((4 + 2 * 6 * 8 * 9) + (8 * 5 + 8) * 9) * 9 + 7 * 7 + 9
6 + 3 + ((5 + 6 * 6 * 4 * 3 * 6) + 4) + 4 + (6 * 7 * 4 * 7 + 4 * 5) * 4
3 * 2 + (4 * 4 * 3)
9 + 7 + (8 + 4 * 5 * 7 + 3) * 9 * 6 + 4
(3 * 8 + 9 + 8 + 5) + (2 * 6 * (2 * 4)) * 7 + (7 + 9 * (4 + 9 * 2 * 9 * 9) * 2) + (4 * 2 * 3 * 9)
2 + 3 * 4 * 6 + 6
8 * 4 * 8 + (2 * (5 + 9) * 3) * 6 * 4
8 + (5 + 3 * 3) * 8 * (9 * 9 + 3 * (9 + 9 * 5 + 8 * 4 + 4) + 9) * ((5 * 7 * 7) * (9 + 6) * 6)
2 + 5 + 7 + 8 * (4 + 9 * 4) + 7
(7 + 9 + 7 + 2 * (5 + 3 * 6 * 5) * 4) + 5 + 8 * 3
8 * 7 + (4 * 8 * 9 * 7 * 7 * 7) * 5 + 6 * 4
((8 + 6 * 9 + 7 + 3) + (8 * 2 + 9 + 6) * 3 * 8 + 9 * 5) + (3 * 8 * 2 * 9 * 5) * 3 + (7 + (7 + 4 + 3) + 3) * (9 + 9 + 6 * 9 + 2 * 9)
(9 * 3 + 2 + 5 * 9) * 5 + 6
(3 * 6 + 5 * 9 + 2 * 6) + 2 * ((9 * 3) * 2 + (9 + 7) * 4 + (2 * 8 + 2 * 4 * 9) + 7) + 9 * (5 * (6 * 8 * 9) * 4 * 6 + 2) + 2
2 + 9 + 6 + (6 + 6) * ((4 * 7 * 6 * 8 + 3 + 3) + 9 + 7) + ((2 * 2 * 6) + (9 + 2 + 6 + 2 + 8) + 4 * 7 * (7 + 4 + 4 * 5 + 8) * 4)
7 * 4 + 9 + (5 + 9 + 9 + 4)
2 * 8 * 2 + (4 * 9)
7 * 3 + (5 + 8 * 4 * (9 + 6 * 8 + 2 * 3 + 9) + 2 * 9) * 9 * 5 + 9
2 * (5 * 6 + 8 * 2 + 6) * 3 * 3 + 7
(6 * 5) + 8 * 3 + 9 * (7 * 4 * (2 * 6 * 6 * 2)) + 6
6 * 5 * 2 * 8 + 8 + (6 * 5 + (7 * 7) + 3 * (9 * 8 * 2 * 5 + 4 + 5))
2 + 3 + 7 + (8 * 2 * 2)
6 + 3 * ((9 + 7 * 4 + 4 * 3 * 6) + (3 * 5 + 8 + 3 * 3 + 4) * 5 + 5 * 5) * ((4 + 2) + 9 * 4 * 9 * 5)
8 + 7 + 6 * 2 * ((8 * 3) * 3) * (2 + 5 * 5 + 5 * 8 + 8)
5 * 2 * 8 * 4 * 7 * 2
4 * 9 + 8 * ((9 * 5) + 5 * 2 * (6 * 4 + 2) * (2 + 8 * 8 + 8 * 2))
3 * 2 + ((8 * 8) * 2 + 8 + 5 * 8 + 9) * ((4 * 7 * 4 + 5 + 6) * 6 * 3)
(3 * (3 + 3) * 2 * 3 * (4 * 2 + 9 + 3 * 5 * 3)) * (2 * 2) * 3 + (5 * 5 * 6 + 2 + 2 * 3) + 7 * 2
4 * (3 + 2)
3 * 9 * 2 + (5 * 7 * 5 + 7 * 5 * 9) + 9
2 + (5 * 7) + 3 + 7 * 8 * 8
((4 * 6 * 8 + 4 + 4) * (2 + 3 + 5 * 2)) + (2 * 5) + 3
9 + (5 * (3 + 8 * 7) + 8 + 4 + 8 * (6 * 2 * 7))
9 + 6 + 6 * 3 * (2 + 7 + (5 + 7 + 4) + 3 * 2) + 5
7 + (5 * 5 + (4 * 5 + 7 * 4 + 3 + 3) * 4 + 7)
9 + 5 + 3 + ((7 + 7 + 2) + (6 + 9 + 7 + 4 * 5 + 7)) + 6 * 6
5 * 8 * 2 + ((6 + 6 * 3 + 6 * 8 * 6) + 6 * 3) + 3 * 2
(5 + 5 * 5 * (3 * 7 * 3 + 2) + 6 + 6) + 7 * 4 + (6 * (8 * 8 + 5) * 9 * 8 * 8 + 4) + 6
(7 + 3 + 6 + 2 * 8 + 5) * 6 * (2 * (3 + 7 + 9 + 6) + 5 + 2) + 8
((7 + 4) * 6 * 9) + 5
2 * 7 + 5 + 4 + 7
9 * (2 * 2 * 7 + 4 * (4 * 6 * 5 * 8))
5 * 9 + 8
6 * 2 * 8 + (5 + 3 + (8 + 9 + 6))
3 * 5 + 9 * (4 + 2 + 9 + (5 * 3) * 3 + 6) * 5
4 * 8 + (3 + 9 * 6) * 7 * (7 * 3 * 9 + 8 + 6 + (9 * 9 + 7 + 4)) + 8
(2 * 9) * (6 * 8 * 6 + 5)
9 * 2 * 3
(6 + 2 * 9 + 5) * 6
(8 + 3 + 2 * (2 + 8 * 2 + 6 * 2 + 2)) * 2
(4 + 8 * 6) * 3 * 6 + 4 * (3 * 2 * 5 + 9 + 9) + 8
3 + (9 * (8 + 6 + 8 * 7) * 8 * 7 + 7) * 7 + 8 + (2 + 3 + 6 * 6 + (2 + 4 + 6 + 5 * 3)) * 5
((5 + 2) + (7 * 4 * 9 + 3) * (4 + 5 * 8 + 6 * 6) + (9 + 2) * 4) + 6 + 9 * 3 * 4 * 5
2 + (7 * 5) + 4 + 3 + (3 * (7 + 2 * 6 * 7 + 6)) + 4
2 + 6 + (3 + 2 + (2 + 3) + 7 * 4 * (8 * 7 * 2 * 4 + 8 * 5))
4 * 3 + 6 + 5 * (9 + (2 * 4 * 8 * 8 + 8) + 2 + 4) + 9
4 * 6 + (9 * 8 * 9 * 5 * 9 + 7) + 7
(4 + (9 + 5 + 2 + 4 * 4 + 6) * 5 + 8) + (2 + 8 + (6 + 5 * 8 * 7) + (7 * 5)) + 5
3 + 2 + (6 * 9 + 9 * 2) * (7 * (5 * 8) + 9 + 6 * (7 + 7 * 9 + 2 + 4) * 7) * 9
5 + 9 * 7 * (8 * (6 + 4 * 5 + 3 * 2 * 4) + (5 + 2) * (6 * 3 * 7 * 6 + 8 + 3))
5 * 7 * 2 + 7 * 6 + (2 * 7 + 5 * 5 * (6 + 7 + 5 + 7))
4 + 7 * 2
9 + ((6 * 7) + (9 + 7 + 7)) * 4
5 + 6 * (3 * (8 * 8 * 3 + 4 * 5) + 4 + (2 + 7 + 3))
(2 + 7 + 6) + 5 + 7 * 6 * 8 * 9
2 * (6 + 9) * 8 * (9 + 4) + 7 + 8
5 + 3 * 6 * 9 + (4 * 8 + 3 * 2)
9 * (2 + 5 * 5) * 9 + (8 + 2 * (5 + 2 * 7 + 7 + 4 * 9) + 3 * 6 + 9) + 8
8 + 4 + (2 + (9 * 2) * 5 * (5 * 8)) * 8 * 7
5 * (3 * 5 + 6 * 4) + (7 * 5 * (6 + 6 * 7 * 8 * 6) + 8)
5 + (4 * 6) + 6 * 5 + 6
7 * 9 + ((6 + 3 + 6 * 4 * 4 * 6) + 7 + (6 + 4 * 7 * 3 + 9 * 6) + 4 + 9) + 6
(8 * 6) + (3 * (3 + 2 * 7 * 9 + 9 + 9) * 3 + (2 + 8 * 5))
3 * 4 * 6 * 4 * ((2 + 3 * 6) * 9)
5 * ((8 * 5 + 7) + 4 + 7 + 6 * (9 * 6 * 3 + 9 * 7 + 2) + (4 + 4)) + 8 * (7 * (2 * 8 * 6) + 8 + 9 + 6) + 7
2 * 8 * 5 * ((9 * 4 * 9 + 5 + 2) + (3 * 9) + (6 + 9 * 4 * 9 * 2) * 5 + 5) * 9
5 + (7 * 8 + 7) + 2 * 5
4 * (7 + 4 + 5 + (6 * 2 + 3)) * (7 * 3 * 7 * 8 * 7) * 2 * 2 + 2
(4 + (5 + 5 * 8) + (5 * 5 + 3 * 5) + 6) + 6
6 + (8 + 6 * 4 + 8 + (7 * 6) * 6) + 2 + 3
(6 + 3) + ((8 * 7 * 6 * 6 + 6 * 7) * 4 * 6 * (3 + 3 * 2)) + 6
4 * 2 * 3 * 3 * 7 + 9
3 * 4 * 8 * (6 * 6 * 3 + (3 * 9 * 3 * 3 + 6)) + 5 + 4
((7 * 2 + 7) + 9) * 2 * 8 * 3 + 3 * 3
2 * 3 + ((2 * 5) + 8 * 7 * 5 + (8 * 2 * 4) * 8) * 3 + 7 * 8
9 + (4 + 6) * 3
(9 + 5) * 3 * 2 * 7 * (6 * 4 * 3)
(3 * 3 * (3 * 3 * 5)) * 7 * 8 + (6 * 7 + 4) * 2 * 2
(2 + 4 * (9 + 9 * 7 * 9) + 4) + 4 + 3
(9 + 4 + 3) * 9 * 3 + 7 * 3
6 + 4 + (6 + 2 + 4) + (9 + 7 * 8)
7 + 9 + 5 * (3 + 9 * 7 + (5 + 8 + 9 * 4 + 6) * 5 * 8) + 9 * 6
(3 * 7 * 7 * 3 + 7) + 4 * 3 + 5
(8 + 7 * 2 + 5) * 4 + 7 * 2 + 5 + 3
9 * 5 * ((5 * 8 + 2) * 7) + 2
8 * 4 * 9 + 2
4 + (3 + 5 * 7 * 3 * 8 + 5) * 6 + (3 + 2 + 9) * 5
(3 * 5 + 8 * 8 * (7 * 6 + 2 * 6 + 9 * 7) * 9) * 7 * 9 + 9 + 3
5 * 9 + 6
6 * (8 + 3 + 4)
2 + 5 + (4 + 5 + 8 * (8 + 6 * 9 * 8 + 3) * (3 + 9 * 3) + 3) + 7 + 2
9 * (6 + 4) * 9 * 4 * 2 * ((4 + 3 + 2 * 9) + 6 + 5 + 8 * 7 + (7 * 7 + 6 + 2 + 8))
(7 * 2 * (4 + 2 + 7 * 5 * 6 * 5) * (3 * 4 + 2) + 6) + 9 + 5 + 3
4 * 5 * ((5 + 9 * 7 + 2) + 4 * 7 + 9) + 9 + 7
7 * 2 * 6 + 9 + 5 * 6
3 + 3 * 7 * ((3 * 3 + 2 + 7 * 5 + 2) + 7 * 6 * 2 * 5 * 9) + (4 * 5) + 7
9 + ((5 + 5 * 7) + 7 * 2) + 7 + 6
4 * 9 * 9 + ((9 + 3 + 7 * 4) * 4 + 2 + 9 + 8 + 6) * 6
(6 * 2 * 5 + 4 + 5) + (8 + (8 * 5 + 7 * 7 + 6 * 2) * 6 + 6) + 4 * 8
(5 + 6 * 2) * 5 * 6 * (5 * 5) + 9
(7 + (9 * 4)) * ((4 + 3 + 5) + 7 * 5)
2 * 5 + ((9 * 6 * 3 * 6 + 4) * 9 * 4) * 2 * 3 * (8 + 6)
3 * 6 * 5 + 9 * (6 + 4 * 2 + 5 * 6)
((7 + 8) + 3 + 7 + (8 * 3 * 6 + 8) * 2) * ((3 * 5 * 9) + 5) * 8 + 8
((3 * 4 + 5 + 2) + 6 * 6) * 9
4 + 6 * (9 * 6 * 7 + (2 * 5 + 5 * 9 + 6)) * 8
4 * (2 + 2 + 9) + 5 + 5 * ((5 + 3) + 4 * 7)
6 + 8 * 3 + 4
2 + 8 + (8 + (7 + 5 * 3 * 8 * 7 + 2) * 6) + 3

156
day18/src/main.rs Normal file
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@ -0,0 +1,156 @@
extern crate nom;
use anyhow::Result;
use nom::{
branch::alt,
bytes::complete::tag,
character::complete::char,
character::complete::{digit1 as digit, space0 as space},
combinator::map_res,
multi::fold_many0,
sequence::{delimited, pair},
IResult,
};
use std::fs::File;
use std::io::{BufRead, BufReader};
use std::str::FromStr;
use std::time::Instant;
const INPUT: &str = "input/input.txt";
// From: https://github.com/Geal/nom/blob/master/tests/arithmetic.rs
fn flat_parens(i: &str) -> IResult<&str, i64> {
delimited(space, delimited(tag("("), flat_expr, tag(")")), space)(i)
}
fn flat_factor(i: &str) -> IResult<&str, i64> {
alt((
map_res(delimited(space, digit, space), FromStr::from_str),
flat_parens,
))(i)
}
fn flat_expr(i: &str) -> IResult<&str, i64> {
let (i, init) = flat_factor(i)?;
fold_many0(
pair(alt((char('+'), char('*'))), flat_factor),
init,
|acc, (op, val): (char, i64)| {
if op == '+' {
acc + val
} else if op == '*' {
acc * val
} else {
acc
}
},
)(i)
}
fn precedent_parens(i: &str) -> IResult<&str, i64> {
delimited(space, delimited(tag("("), precedent_expr, tag(")")), space)(i)
}
fn precedent_factor(i: &str) -> IResult<&str, i64> {
alt((
map_res(delimited(space, digit, space), FromStr::from_str),
precedent_parens,
))(i)
}
fn sum(i: &str) -> IResult<&str, i64> {
let (i, init) = precedent_factor(i)?;
fold_many0(
pair(char('+'), precedent_factor),
init,
|acc, (op, val): (char, i64)| {
if op == '+' {
acc + val
} else {
acc
}
},
)(i)
}
fn precedent_expr(i: &str) -> IResult<&str, i64> {
let (i, init) = sum(i)?;
fold_many0(pair(char('*'), sum), init, |acc, (op, val): (char, i64)| {
if op == '*' {
acc * val
} else {
acc
}
})(i)
}
fn solve_part1(input_path: &str) -> Result<i64> {
let file = File::open(input_path)?;
let reader = BufReader::new(file);
Ok(reader
.lines()
.map(|line| flat_expr(&line.unwrap()).unwrap().1)
.sum::<i64>())
}
fn solve_part2(input_path: &str) -> Result<i64> {
let file = File::open(input_path)?;
let reader = BufReader::new(file);
Ok(reader
.lines()
.map(|line| precedent_expr(&line.unwrap()).unwrap().1)
.sum::<i64>())
}
fn main() {
let mut now = Instant::now();
println!("Part 1: {}", solve_part1(INPUT).unwrap());
println!("(elapsed: {:?})", now.elapsed());
now = Instant::now();
println!("");
println!("Part 2: {}", solve_part2(INPUT).unwrap());
println!("(elapsed: {:?})", now.elapsed());
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn solves_part1() {
assert_eq!(flat_expr("1 + 2 * 3 + 4 * 5 + 6"), Ok(("", 71)));
assert_eq!(flat_expr("1 + (2 * 3) + (4 * (5 + 6))"), Ok(("", 51)));
assert_eq!(flat_expr("2 * 3 + (4 * 5)"), Ok(("", 26)));
assert_eq!(flat_expr("5 + (8 * 3 + 9 + 3 * 4 * 3)"), Ok(("", 437)));
assert_eq!(
flat_expr("5 * 9 * (7 * 3 * 3 + 9 * 3 + (8 + 6 * 4))"),
Ok(("", 12240))
);
assert_eq!(
flat_expr("((2 + 4 * 9) * (6 + 9 * 8 + 6) + 6) + 2 + 4 * 2"),
Ok(("", 13632))
);
}
#[test]
fn solves_part2() {
assert_eq!(precedent_expr("1 + 2 * 3 + 4 * 5 + 6"), Ok(("", 231)));
assert_eq!(precedent_expr("1 + (2 * 3) + (4 * (5 + 6))"), Ok(("", 51)));
assert_eq!(precedent_expr("2 * 3 + (4 * 5)"), Ok(("", 46)));
assert_eq!(
precedent_expr("5 + (8 * 3 + 9 + 3 * 4 * 3)"),
Ok(("", 1445))
);
assert_eq!(
precedent_expr("5 * 9 * (7 * 3 * 3 + 9 * 3 + (8 + 6 * 4))"),
Ok(("", 669060))
);
assert_eq!(
precedent_expr("((2 + 4 * 9) * (6 + 9 * 8 + 6) + 6) + 2 + 4 * 2"),
Ok(("", 23340))
);
}
}