Move Day 5 to its own crate
This commit is contained in:
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commit
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4 changed files with 27 additions and 12 deletions
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[M] [Z] [V]
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[Z] [P] [L] [Z] [J]
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[S] [D] [W] [W] [H] [Q]
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[P] [V] [N] [D] [P] [C] [V]
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[H] [B] [J] [V] [B] [M] [N] [P]
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[V] [F] [L] [Z] [C] [S] [P] [S] [G]
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[F] [J] [M] [G] [R] [R] [H] [R] [L]
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[G] [G] [G] [N] [V] [V] [T] [Q] [F]
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1 2 3 4 5 6 7 8 9
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move 6 from 9 to 3
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move 3 from 7 to 2
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move 10 from 3 to 5
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move 4 from 4 to 6
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move 2 from 7 to 6
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move 2 from 6 to 9
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move 8 from 1 to 9
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move 1 from 1 to 2
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move 1 from 2 to 7
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move 6 from 6 to 3
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move 7 from 3 to 5
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move 14 from 5 to 6
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move 2 from 1 to 3
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move 5 from 5 to 8
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move 5 from 8 to 1
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move 2 from 7 to 1
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move 5 from 6 to 9
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move 8 from 9 to 3
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move 13 from 9 to 3
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move 7 from 1 to 4
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move 6 from 4 to 1
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move 22 from 3 to 1
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move 1 from 9 to 3
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move 2 from 6 to 1
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move 1 from 3 to 4
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move 7 from 9 to 8
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move 2 from 1 to 7
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move 2 from 3 to 2
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move 2 from 6 to 9
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move 2 from 7 to 8
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move 1 from 3 to 6
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move 9 from 8 to 6
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move 1 from 2 to 4
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move 8 from 1 to 2
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move 1 from 9 to 4
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move 3 from 4 to 1
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move 1 from 4 to 6
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move 10 from 6 to 5
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move 5 from 2 to 9
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move 6 from 9 to 3
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move 2 from 5 to 3
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move 2 from 9 to 7
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move 7 from 5 to 8
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move 5 from 6 to 2
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move 3 from 3 to 7
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move 3 from 3 to 5
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move 4 from 5 to 8
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move 1 from 3 to 5
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move 6 from 6 to 8
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move 1 from 5 to 7
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move 9 from 8 to 9
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move 1 from 3 to 1
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move 7 from 2 to 7
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move 9 from 7 to 6
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move 2 from 2 to 3
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move 7 from 9 to 3
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move 9 from 6 to 8
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move 7 from 3 to 4
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move 2 from 7 to 6
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move 4 from 4 to 5
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move 3 from 5 to 6
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move 2 from 7 to 4
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move 5 from 4 to 7
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move 13 from 8 to 4
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move 2 from 9 to 4
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move 2 from 8 to 7
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move 6 from 7 to 5
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move 6 from 4 to 2
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move 1 from 7 to 5
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move 3 from 2 to 7
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move 1 from 7 to 8
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move 3 from 2 to 4
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move 2 from 3 to 9
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move 2 from 7 to 2
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move 6 from 5 to 4
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move 3 from 6 to 2
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move 2 from 6 to 9
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move 5 from 2 to 9
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move 12 from 4 to 8
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move 3 from 9 to 2
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move 12 from 1 to 5
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move 4 from 4 to 6
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move 12 from 8 to 9
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move 2 from 6 to 5
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move 1 from 4 to 8
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move 1 from 4 to 1
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move 3 from 2 to 1
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move 2 from 6 to 7
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move 1 from 5 to 9
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move 2 from 1 to 4
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move 10 from 5 to 1
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move 2 from 7 to 3
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move 18 from 9 to 7
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move 8 from 7 to 2
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move 1 from 9 to 6
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move 1 from 6 to 7
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move 10 from 7 to 9
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move 1 from 4 to 2
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move 19 from 1 to 5
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move 8 from 5 to 9
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move 3 from 8 to 4
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move 2 from 5 to 2
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move 2 from 3 to 6
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move 10 from 5 to 2
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move 4 from 1 to 2
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move 2 from 9 to 2
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move 1 from 1 to 6
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move 2 from 5 to 6
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move 1 from 8 to 7
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move 1 from 5 to 8
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move 1 from 5 to 6
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move 18 from 2 to 5
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move 5 from 2 to 1
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move 6 from 5 to 8
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move 1 from 8 to 9
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move 2 from 2 to 4
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move 1 from 2 to 6
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move 2 from 7 to 6
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move 1 from 4 to 1
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move 4 from 8 to 5
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move 1 from 2 to 9
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move 2 from 8 to 3
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move 1 from 3 to 6
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move 1 from 4 to 8
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move 1 from 8 to 9
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move 10 from 5 to 7
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move 5 from 5 to 1
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move 2 from 4 to 1
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move 3 from 7 to 6
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move 12 from 1 to 4
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move 8 from 9 to 5
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move 6 from 7 to 4
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move 1 from 7 to 9
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move 4 from 4 to 3
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move 1 from 1 to 7
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move 3 from 9 to 5
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move 2 from 3 to 1
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move 1 from 7 to 6
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move 8 from 4 to 7
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move 1 from 7 to 6
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move 7 from 6 to 4
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move 2 from 1 to 3
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move 1 from 7 to 1
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move 1 from 3 to 7
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move 1 from 1 to 6
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move 4 from 9 to 3
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move 5 from 4 to 6
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move 12 from 6 to 2
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move 3 from 9 to 4
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move 8 from 2 to 6
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move 2 from 9 to 6
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move 8 from 5 to 6
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move 4 from 5 to 8
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move 14 from 6 to 3
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move 11 from 4 to 9
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move 2 from 2 to 7
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move 8 from 3 to 9
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move 11 from 3 to 6
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move 14 from 9 to 1
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move 7 from 1 to 3
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move 2 from 9 to 5
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move 2 from 2 to 8
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move 6 from 7 to 5
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move 1 from 9 to 8
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move 13 from 6 to 3
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move 4 from 6 to 8
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move 3 from 1 to 6
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move 5 from 5 to 8
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move 7 from 8 to 7
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move 2 from 1 to 8
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move 1 from 4 to 1
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move 4 from 8 to 9
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move 8 from 7 to 5
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move 1 from 8 to 1
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move 4 from 9 to 3
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move 1 from 4 to 5
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move 5 from 5 to 2
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move 1 from 8 to 9
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move 1 from 8 to 6
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move 2 from 6 to 2
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move 4 from 8 to 6
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move 4 from 1 to 8
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move 4 from 8 to 5
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move 1 from 9 to 8
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move 1 from 2 to 3
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move 4 from 6 to 1
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move 1 from 8 to 2
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move 3 from 5 to 4
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move 4 from 2 to 5
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move 1 from 7 to 9
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move 1 from 2 to 6
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move 3 from 1 to 8
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move 2 from 4 to 5
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move 2 from 6 to 1
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move 3 from 8 to 9
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move 4 from 9 to 2
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move 1 from 7 to 1
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move 1 from 6 to 7
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move 4 from 1 to 6
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move 1 from 7 to 4
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move 6 from 2 to 8
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move 2 from 4 to 8
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move 1 from 9 to 5
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move 3 from 6 to 2
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move 1 from 6 to 4
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move 7 from 3 to 5
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move 2 from 8 to 1
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move 3 from 2 to 8
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move 6 from 8 to 5
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move 17 from 5 to 3
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move 2 from 1 to 6
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move 3 from 8 to 3
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move 1 from 9 to 5
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move 11 from 5 to 2
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move 40 from 3 to 5
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move 11 from 2 to 7
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move 4 from 7 to 8
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move 1 from 8 to 9
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move 1 from 3 to 5
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move 1 from 4 to 8
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move 19 from 5 to 8
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move 7 from 7 to 8
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move 16 from 5 to 2
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move 6 from 5 to 8
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move 1 from 5 to 8
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move 1 from 9 to 4
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move 1 from 6 to 1
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move 1 from 4 to 7
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move 1 from 6 to 9
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move 1 from 1 to 7
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move 1 from 7 to 3
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move 1 from 7 to 2
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move 1 from 9 to 8
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move 1 from 3 to 4
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move 1 from 4 to 6
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move 14 from 2 to 9
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move 24 from 8 to 4
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move 8 from 8 to 3
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move 1 from 6 to 3
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move 16 from 4 to 1
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move 3 from 8 to 4
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move 3 from 3 to 8
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move 4 from 3 to 4
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move 1 from 3 to 9
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move 13 from 9 to 4
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move 16 from 1 to 8
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move 8 from 8 to 1
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move 3 from 1 to 7
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move 1 from 8 to 6
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move 1 from 3 to 8
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move 10 from 8 to 5
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move 5 from 5 to 2
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move 1 from 8 to 9
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move 1 from 4 to 5
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move 3 from 5 to 2
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move 1 from 6 to 1
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move 5 from 1 to 5
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move 2 from 3 to 2
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move 5 from 9 to 5
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move 2 from 7 to 9
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move 2 from 9 to 8
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move 5 from 3 to 5
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move 2 from 1 to 8
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move 2 from 8 to 6
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move 1 from 8 to 7
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move 2 from 9 to 6
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move 3 from 5 to 7
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move 3 from 2 to 5
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move 10 from 5 to 8
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move 7 from 5 to 4
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move 8 from 8 to 5
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move 5 from 7 to 5
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move 1 from 8 to 2
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move 6 from 5 to 1
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move 7 from 4 to 2
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move 4 from 1 to 5
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move 1 from 7 to 9
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move 1 from 8 to 6
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move 1 from 7 to 8
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move 10 from 5 to 9
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move 8 from 5 to 2
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move 1 from 6 to 8
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move 13 from 9 to 3
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move 8 from 1 to 2
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move 5 from 1 to 3
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move 10 from 2 to 1
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move 7 from 2 to 5
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move 3 from 5 to 7
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move 4 from 1 to 3
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move 1 from 2 to 3
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move 3 from 1 to 2
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move 1 from 8 to 6
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move 2 from 7 to 5
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move 6 from 5 to 4
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move 2 from 2 to 1
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move 1 from 2 to 9
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move 5 from 5 to 9
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move 1 from 6 to 8
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move 1 from 5 to 1
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move 5 from 2 to 4
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move 3 from 1 to 6
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move 2 from 4 to 7
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move 1 from 8 to 4
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move 2 from 4 to 3
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move 2 from 1 to 5
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move 1 from 6 to 7
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move 6 from 3 to 7
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move 1 from 2 to 4
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move 8 from 7 to 3
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move 1 from 4 to 5
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move 1 from 7 to 9
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move 5 from 3 to 6
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move 1 from 8 to 4
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move 4 from 3 to 2
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move 32 from 9 to 3
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move 3 from 6 to 7
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move 5 from 9 to 3
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move 1 from 9 to 7
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move 2 from 9 to 2
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move 2 from 4 to 3
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move 2 from 5 to 4
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move 5 from 3 to 2
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move 3 from 7 to 8
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move 1 from 7 to 2
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move 1 from 8 to 5
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move 1 from 3 to 4
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move 5 from 4 to 5
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move 4 from 5 to 2
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move 3 from 5 to 7
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move 1 from 7 to 5
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move 1 from 6 to 5
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move 2 from 8 to 5
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move 15 from 2 to 4
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move 3 from 5 to 6
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move 4 from 6 to 5
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move 2 from 5 to 2
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move 1 from 2 to 4
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move 25 from 3 to 9
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move 2 from 5 to 2
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move 11 from 9 to 2
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move 13 from 2 to 1
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move 4 from 4 to 7
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move 12 from 9 to 8
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move 6 from 7 to 8
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move 7 from 4 to 7
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move 7 from 7 to 8
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move 1 from 5 to 1
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move 5 from 4 to 3
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move 2 from 2 to 1
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move 2 from 9 to 5
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move 7 from 1 to 7
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move 1 from 1 to 4
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move 12 from 3 to 2
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move 1 from 3 to 9
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move 1 from 1 to 3
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move 1 from 9 to 1
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move 7 from 7 to 2
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move 1 from 4 to 7
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move 2 from 8 to 7
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move 7 from 1 to 2
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move 1 from 3 to 4
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move 26 from 2 to 1
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move 4 from 8 to 1
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move 3 from 1 to 6
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move 1 from 6 to 3
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move 1 from 6 to 9
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move 1 from 3 to 8
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move 20 from 1 to 3
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move 1 from 9 to 7
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move 4 from 7 to 1
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move 1 from 5 to 3
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move 4 from 3 to 5
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move 1 from 6 to 2
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move 6 from 3 to 2
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move 8 from 1 to 4
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move 1 from 1 to 5
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move 3 from 1 to 4
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move 7 from 2 to 4
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move 10 from 3 to 8
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move 4 from 4 to 3
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move 12 from 4 to 7
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move 3 from 3 to 1
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move 2 from 4 to 3
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move 2 from 8 to 1
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move 6 from 8 to 9
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move 5 from 9 to 6
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move 1 from 9 to 3
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move 3 from 8 to 7
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move 10 from 8 to 5
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move 4 from 8 to 7
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move 9 from 7 to 9
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move 4 from 8 to 4
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move 2 from 4 to 3
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move 3 from 1 to 7
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move 11 from 7 to 4
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move 6 from 4 to 8
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move 1 from 7 to 3
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move 4 from 5 to 1
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move 5 from 3 to 6
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move 5 from 9 to 4
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move 1 from 9 to 8
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move 10 from 4 to 8
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move 5 from 1 to 2
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move 1 from 7 to 6
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move 9 from 6 to 3
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move 7 from 8 to 7
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move 3 from 4 to 1
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move 2 from 2 to 1
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move 9 from 8 to 3
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move 10 from 5 to 8
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move 18 from 3 to 9
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move 1 from 7 to 8
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move 1 from 5 to 3
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move 4 from 8 to 3
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move 2 from 6 to 3
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move 6 from 7 to 2
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move 1 from 5 to 3
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move 1 from 1 to 9
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move 10 from 3 to 9
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move 4 from 1 to 8
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move 13 from 8 to 1
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move 3 from 1 to 8
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move 3 from 2 to 4
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move 5 from 2 to 6
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move 5 from 6 to 4
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move 28 from 9 to 2
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move 2 from 9 to 5
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move 2 from 5 to 2
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move 1 from 3 to 7
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move 2 from 1 to 4
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move 3 from 8 to 3
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move 1 from 9 to 4
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move 3 from 4 to 6
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move 2 from 3 to 7
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move 8 from 1 to 5
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move 3 from 7 to 6
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move 14 from 2 to 8
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move 1 from 9 to 1
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move 6 from 5 to 6
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move 4 from 2 to 5
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move 9 from 8 to 2
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move 4 from 8 to 4
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move 7 from 2 to 4
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move 12 from 4 to 3
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move 5 from 4 to 7
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move 5 from 7 to 4
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move 1 from 8 to 7
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move 1 from 4 to 5
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move 2 from 5 to 4
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move 1 from 5 to 8
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move 1 from 5 to 9
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@ -1,168 +0,0 @@
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use std::fmt;
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use std::io::Result;
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use crate::file::line_reader_for_file;
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#[derive(PartialEq)]
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enum State {
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StartingState,
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Instructions,
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}
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#[derive(Debug)]
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struct Stacks(Vec<Vec<String>>);
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impl Stacks {
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fn part1_perform(
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&mut self,
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instruction: &Instruction,
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) -> std::result::Result<(), &'static str> {
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for _ in 0..instruction.quantity {
|
||||
let item = self.0[instruction.from_stack].pop().unwrap();
|
||||
self.0[instruction.to_stack].push(item);
|
||||
}
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn part2_perform(
|
||||
&mut self,
|
||||
instruction: &Instruction,
|
||||
) -> std::result::Result<(), &'static str> {
|
||||
let from_stack_len: usize = self.0[instruction.from_stack].len();
|
||||
let index_of_last_n = from_stack_len - instruction.quantity;
|
||||
|
||||
let last_n = Vec::from(self.0[instruction.from_stack].split_at(index_of_last_n).1);
|
||||
self.0[instruction.to_stack].extend(last_n.into_iter());
|
||||
|
||||
let _ = self.0[instruction.from_stack].drain(index_of_last_n..);
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn tops(&self) -> impl Iterator<Item = &str> {
|
||||
self.0.iter().filter_map(|s| s.last()).map(|s| s.as_str())
|
||||
}
|
||||
}
|
||||
|
||||
impl fmt::Display for Stacks {
|
||||
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||||
write!(
|
||||
f,
|
||||
"{}",
|
||||
self.0
|
||||
.iter()
|
||||
.enumerate()
|
||||
.map(|(i, v)| format!("{}: {}", i, v.join(", ")))
|
||||
.collect::<Vec<String>>()
|
||||
.join("\n")
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
struct Instruction {
|
||||
quantity: usize,
|
||||
from_stack: usize,
|
||||
to_stack: usize,
|
||||
}
|
||||
|
||||
impl TryFrom<&str> for Instruction {
|
||||
type Error = &'static str;
|
||||
|
||||
fn try_from(s: &str) -> std::result::Result<Instruction, Self::Error> {
|
||||
let quantity: usize;
|
||||
let from_stack: usize;
|
||||
let to_stack: usize;
|
||||
|
||||
let mut split_str = s.split(" ");
|
||||
|
||||
if split_str.next() != Some("move") {
|
||||
return Err("Missing 'move'");
|
||||
}
|
||||
|
||||
match split_str.next().map(|s| usize::from_str_radix(s, 10)) {
|
||||
Some(Ok(parsed_quantity)) => quantity = parsed_quantity,
|
||||
_ => return Err("Missing quantity value"),
|
||||
}
|
||||
|
||||
if split_str.next() != Some("from") {
|
||||
return Err("Missing 'from'");
|
||||
}
|
||||
|
||||
match split_str.next().map(|s| usize::from_str_radix(s, 10)) {
|
||||
Some(Ok(parsed_from_stack)) => from_stack = parsed_from_stack - 1,
|
||||
_ => return Err("Missing from value"),
|
||||
}
|
||||
|
||||
if split_str.next() != Some("to") {
|
||||
return Err("Missing 'to'");
|
||||
}
|
||||
|
||||
match split_str.next().map(|s| usize::from_str_radix(s, 10)) {
|
||||
Some(Ok(parsed_to_stack)) => to_stack = parsed_to_stack - 1,
|
||||
_ => return Err("Missing to value"),
|
||||
}
|
||||
|
||||
Ok(Instruction {
|
||||
quantity: quantity,
|
||||
from_stack: from_stack,
|
||||
to_stack: to_stack,
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
pub fn main(filename: &str) -> Result<()> {
|
||||
let mut line_reader = line_reader_for_file(filename)?.peekable();
|
||||
|
||||
let first_line = line_reader.peek().unwrap().as_ref().unwrap();
|
||||
let number_of_stacks = (first_line.len() as f32 / 4.0).ceil() as usize;
|
||||
let mut part1_stacks = Stacks(vec![vec![]; number_of_stacks]);
|
||||
let mut part2_stacks = Stacks(vec![vec![]; number_of_stacks]);
|
||||
|
||||
let mut state = State::StartingState;
|
||||
|
||||
for line in line_reader {
|
||||
let line = line?;
|
||||
|
||||
if line.is_empty() {
|
||||
assert!(state == State::StartingState);
|
||||
state = State::Instructions;
|
||||
continue;
|
||||
}
|
||||
|
||||
match state {
|
||||
State::StartingState => {
|
||||
let mut chars = line.chars().peekable();
|
||||
let mut index_of_stack = 0;
|
||||
while chars.peek() != None {
|
||||
// Read the line in 4 character chunks.
|
||||
let stack: Vec<char> = chars.by_ref().take(4).collect();
|
||||
if stack[0] == '[' {
|
||||
part1_stacks.0[index_of_stack].insert(0, String::from(stack[1]));
|
||||
part2_stacks.0[index_of_stack].insert(0, String::from(stack[1]));
|
||||
}
|
||||
|
||||
index_of_stack += 1;
|
||||
}
|
||||
}
|
||||
State::Instructions => {
|
||||
let instruction = Instruction::try_from(line.as_str()).unwrap();
|
||||
let _ = part1_stacks.part1_perform(&instruction);
|
||||
let _ = part2_stacks.part2_perform(&instruction);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
println!("{}", part1_stacks);
|
||||
println!(
|
||||
"Part 1: tops of stacks: {}",
|
||||
part1_stacks.tops().collect::<Vec<&str>>().join("")
|
||||
);
|
||||
println!("{}", part2_stacks);
|
||||
println!(
|
||||
"Part 2: tops of stacks: {}",
|
||||
part2_stacks.tops().collect::<Vec<&str>>().join("")
|
||||
);
|
||||
|
||||
Ok(())
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue