Completed day 8
This commit is contained in:
parent
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day08/Cargo.lock
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day08/Cargo.lock
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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[[package]]
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name = "anyhow"
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version = "1.0.35"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "2c0df63cb2955042487fad3aefd2c6e3ae7389ac5dc1beb28921de0b69f779d4"
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[[package]]
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name = "day08"
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version = "0.1.0"
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dependencies = [
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"anyhow",
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]
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10
day08/Cargo.toml
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day08/Cargo.toml
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[package]
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name = "day08"
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version = "0.1.0"
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authors = ["Tyler Hallada <tyler@hallada.net>"]
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edition = "2018"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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anyhow = "1.0"
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633
day08/input/input.txt
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633
day08/input/input.txt
Executable file
@ -0,0 +1,633 @@
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acc +33
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acc -7
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acc +39
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jmp +214
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jmp +250
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jmp +51
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acc +29
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acc +6
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acc +20
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jmp +489
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nop +181
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acc +4
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jmp +187
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nop +454
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acc -10
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acc +44
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jmp +343
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acc +14
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acc +24
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acc +37
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acc -12
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jmp +596
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acc +21
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acc +39
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jmp +601
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acc -15
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jmp +304
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acc -7
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jmp +302
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acc +38
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jmp +148
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acc -6
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jmp +235
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acc +6
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nop +429
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acc +49
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acc +3
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jmp +255
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acc +2
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jmp +10
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acc +27
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acc +0
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acc -3
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acc +28
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jmp +565
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acc -16
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acc +39
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acc -5
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jmp +513
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acc +43
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acc +24
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jmp +26
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nop +19
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nop +71
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nop +182
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jmp +477
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acc +42
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jmp +535
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acc +38
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acc +29
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acc +1
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jmp +1
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jmp +72
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acc +25
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acc +43
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acc +6
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jmp +1
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jmp +111
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acc +43
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acc +13
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jmp +30
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acc +4
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acc +24
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acc +20
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acc -14
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jmp +161
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jmp +73
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nop +108
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jmp +547
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nop +273
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acc -8
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nop +358
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nop +284
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jmp +526
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acc +50
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jmp +274
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jmp +486
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nop +167
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acc -13
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jmp +11
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acc +10
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jmp +508
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acc -11
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acc +46
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acc +44
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jmp +335
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jmp +1
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acc -16
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acc +30
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jmp +289
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acc +15
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nop +265
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jmp +1
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nop +68
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jmp +107
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acc -15
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jmp -101
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acc +28
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acc -13
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jmp +17
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acc +21
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acc +46
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acc +19
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acc -8
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jmp +274
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nop +237
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jmp -111
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nop +419
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acc +28
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acc +26
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jmp +275
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acc -4
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jmp +483
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jmp +1
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jmp +201
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jmp +234
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acc +26
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acc +21
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acc +18
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jmp +149
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acc +0
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acc +11
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jmp -41
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nop +111
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nop +212
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jmp +172
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acc +31
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acc +17
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acc +6
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jmp -40
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acc +7
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acc +44
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acc +41
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acc +4
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jmp -74
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acc -16
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acc +37
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jmp +119
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acc -13
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acc +44
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acc +21
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acc +38
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jmp +92
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acc +30
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jmp +444
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jmp +35
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acc +3
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acc +11
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acc +31
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jmp -104
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acc -10
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acc +5
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acc +8
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acc +31
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jmp +127
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nop +168
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acc +16
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acc +6
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acc +0
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jmp +455
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acc +15
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acc -1
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jmp +191
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acc +16
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jmp +56
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acc -12
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acc +40
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nop -140
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acc +44
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jmp +138
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acc +44
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jmp +237
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acc +15
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acc +40
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jmp +360
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acc +14
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acc +14
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jmp +185
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nop +211
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acc +27
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acc -8
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acc +17
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jmp +247
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acc +50
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acc -2
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acc +37
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jmp +330
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acc +14
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acc +44
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acc +15
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nop -43
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jmp +382
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jmp -45
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acc +46
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acc -11
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acc +47
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jmp +61
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nop +252
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acc +44
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acc -13
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jmp +292
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acc -6
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jmp +199
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acc +44
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acc +28
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acc +17
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acc +31
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jmp -158
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nop +306
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acc +40
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acc +33
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jmp -169
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acc +8
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jmp -135
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acc +20
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acc -14
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acc -15
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nop +370
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jmp +20
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nop +51
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acc -4
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jmp -158
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jmp -169
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nop +225
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jmp +273
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jmp +293
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jmp -71
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acc -3
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acc +30
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jmp +105
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acc +18
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jmp +109
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jmp -188
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nop -70
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acc -2
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acc +0
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jmp +195
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acc +15
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acc +49
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acc +28
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jmp -18
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nop +120
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jmp +91
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acc -15
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acc +15
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acc +30
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jmp +39
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acc +46
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nop +250
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acc +49
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jmp -250
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acc -10
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acc +0
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acc +39
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jmp -254
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nop +55
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acc -4
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acc -3
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jmp +88
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jmp +35
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acc +47
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nop -154
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acc -16
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jmp +271
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nop +253
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jmp -199
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acc +5
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acc +35
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jmp +1
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acc +49
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jmp +234
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acc +27
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acc +33
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acc -3
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jmp -138
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jmp -107
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acc -11
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acc +47
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acc +14
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jmp -288
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jmp -205
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acc +0
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jmp +191
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acc -15
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jmp -116
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acc +35
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nop +121
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acc +2
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acc -14
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jmp +223
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acc +33
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acc -10
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acc +24
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jmp +73
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acc +19
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jmp -16
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nop +1
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jmp -177
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nop +107
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nop -194
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jmp +260
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acc -16
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acc -12
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jmp -148
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acc +11
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acc +18
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acc +33
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jmp +84
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acc +27
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acc -13
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acc +36
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acc +26
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jmp +100
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nop -110
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jmp -98
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acc -2
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acc +29
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acc +25
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acc -8
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jmp +128
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acc +16
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acc +1
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acc +7
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jmp -290
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acc +18
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nop -235
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acc +0
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jmp -127
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acc -18
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acc +38
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jmp -297
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acc +19
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acc -8
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acc +20
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acc +3
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jmp -230
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jmp -67
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jmp +124
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acc -15
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acc +26
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acc -19
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jmp +120
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jmp +173
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jmp -338
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acc -15
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jmp -309
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acc +19
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acc +26
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acc +18
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acc +8
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jmp -6
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acc -7
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acc +10
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jmp -375
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acc +5
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acc -16
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acc +18
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acc +46
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jmp -309
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acc +48
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||||
acc +40
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nop -227
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jmp -380
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||||
jmp -290
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acc +46
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acc +5
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jmp -154
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acc -9
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acc +15
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||||
jmp -187
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acc -10
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||||
acc +0
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acc +28
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acc +30
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jmp -284
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acc +43
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acc +25
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acc +14
|
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jmp -205
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acc -13
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acc +1
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nop -340
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jmp -326
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jmp +1
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acc +9
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acc +17
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acc +1
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jmp -346
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jmp -158
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acc +23
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jmp -26
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nop -257
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jmp +140
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acc +11
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acc +10
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acc +29
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acc +48
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jmp +177
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acc +28
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acc -12
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acc -19
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acc +37
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jmp +79
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acc -14
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jmp -184
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nop +153
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jmp -170
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acc -17
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acc +10
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acc -6
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nop -174
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jmp -391
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jmp +148
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acc +50
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acc -8
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jmp -426
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jmp +1
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acc +16
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jmp +20
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jmp +1
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jmp -217
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nop +84
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jmp +71
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acc +16
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acc -7
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acc +23
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acc +24
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jmp -329
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acc +9
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acc -7
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||||
acc -4
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nop +117
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jmp -16
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acc +30
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nop -222
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acc +32
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acc +9
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jmp -175
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acc +18
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acc +15
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||||
acc +41
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jmp -192
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acc -3
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acc +8
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acc -13
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acc +24
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jmp -210
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acc +17
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acc -7
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||||
acc -19
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jmp +76
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||||
acc +26
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||||
acc +2
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||||
acc +4
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||||
jmp +27
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||||
jmp -104
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||||
acc +38
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||||
acc +46
|
||||
nop -67
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||||
nop +37
|
||||
jmp -186
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jmp +5
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||||
acc +37
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||||
acc +8
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||||
acc +30
|
||||
jmp -409
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||||
acc +44
|
||||
acc +4
|
||||
jmp +109
|
||||
nop -8
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jmp -395
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acc +20
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acc +12
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||||
acc +16
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acc +9
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jmp -87
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nop -406
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acc -8
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jmp -209
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jmp -137
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jmp -179
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acc +44
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jmp -399
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nop -141
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jmp +18
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jmp +1
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nop +55
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||||
jmp +39
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acc +20
|
||||
acc +40
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||||
acc +44
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acc +45
|
||||
jmp +74
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acc -16
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jmp -170
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||||
jmp -48
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||||
jmp -537
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||||
acc -9
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||||
acc +6
|
||||
nop -101
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acc +2
|
||||
jmp -418
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jmp -81
|
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jmp +1
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jmp -338
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nop +43
|
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acc +20
|
||||
jmp -109
|
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acc -1
|
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jmp -343
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||||
acc +29
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acc +11
|
||||
nop -439
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jmp -310
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jmp -374
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||||
acc +33
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nop +25
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acc -16
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nop -333
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jmp -14
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jmp -5
|
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jmp -162
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nop -432
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acc +16
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acc +17
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jmp -87
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||||
acc -16
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nop -265
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acc +20
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jmp -356
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||||
acc +0
|
||||
jmp +5
|
||||
acc +39
|
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acc -15
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jmp -325
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||||
jmp -39
|
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nop -376
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||||
nop -116
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acc +38
|
||||
jmp -175
|
||||
jmp -450
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||||
jmp +1
|
||||
acc +19
|
||||
jmp -58
|
||||
nop -39
|
||||
acc +40
|
||||
acc +42
|
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jmp -232
|
||||
acc -14
|
||||
jmp -17
|
||||
acc +4
|
||||
acc -9
|
||||
acc +45
|
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jmp -229
|
||||
jmp -18
|
||||
acc +13
|
||||
acc +17
|
||||
jmp -591
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jmp -604
|
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jmp -356
|
||||
acc +1
|
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acc +18
|
||||
nop -52
|
||||
acc +39
|
||||
jmp -361
|
||||
jmp -303
|
||||
acc +8
|
||||
nop -477
|
||||
acc +3
|
||||
acc -8
|
||||
jmp -404
|
||||
acc +24
|
||||
acc +5
|
||||
jmp -88
|
||||
acc +27
|
||||
jmp -54
|
||||
jmp -18
|
||||
acc +31
|
||||
acc +40
|
||||
acc +18
|
||||
acc -16
|
||||
jmp +1
|
||||
9
day08/input/test.txt
Normal file
9
day08/input/test.txt
Normal file
@ -0,0 +1,9 @@
|
||||
nop +0
|
||||
acc +1
|
||||
jmp +4
|
||||
acc +3
|
||||
jmp -3
|
||||
acc -99
|
||||
acc +1
|
||||
jmp -4
|
||||
acc +6
|
||||
156
day08/src/main.rs
Normal file
156
day08/src/main.rs
Normal file
@ -0,0 +1,156 @@
|
||||
use anyhow::{anyhow, Context, Error, Result};
|
||||
|
||||
use std::collections::HashSet;
|
||||
use std::fs::File;
|
||||
use std::io::prelude::*;
|
||||
use std::io::BufReader;
|
||||
use std::str::FromStr;
|
||||
|
||||
const INPUT: &str = "input/input.txt";
|
||||
|
||||
#[derive(Debug, PartialEq)]
|
||||
enum Operation {
|
||||
Nop(i32),
|
||||
Acc(i32),
|
||||
Jmp(i32),
|
||||
}
|
||||
|
||||
impl FromStr for Operation {
|
||||
type Err = Error;
|
||||
|
||||
fn from_str(s: &str) -> Result<Self> {
|
||||
let mut instruction = s.split(" ");
|
||||
let op = instruction.next().context("Failed to parse operation")?;
|
||||
let offset: i32 = instruction
|
||||
.next()
|
||||
.context("Failed to parse operation offset")?
|
||||
.parse()?;
|
||||
match op {
|
||||
"nop" => Ok(Operation::Nop(offset)),
|
||||
"acc" => Ok(Operation::Acc(offset)),
|
||||
"jmp" => Ok(Operation::Jmp(offset)),
|
||||
_ => Err(anyhow!("Unrecognized operation: {}", op)),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn find_infinite_loop(program: &Vec<Operation>) -> i32 {
|
||||
let mut accumulator: i32 = 0;
|
||||
let mut pointer: i32 = 0;
|
||||
let mut visited = HashSet::new();
|
||||
while !visited.contains(&pointer) {
|
||||
visited.insert(pointer);
|
||||
match program[pointer as usize] {
|
||||
Operation::Nop(_) => pointer += 1,
|
||||
Operation::Acc(offset) => {
|
||||
accumulator += offset;
|
||||
pointer += 1;
|
||||
}
|
||||
Operation::Jmp(offset) => pointer += offset,
|
||||
}
|
||||
}
|
||||
accumulator
|
||||
}
|
||||
|
||||
fn find_terminated_value(program: &Vec<Operation>, flip_pointer: i32) -> Option<i32> {
|
||||
let mut accumulator: i32 = 0;
|
||||
let mut pointer: i32 = 0;
|
||||
let mut visited = HashSet::new();
|
||||
while !visited.contains(&pointer) {
|
||||
if pointer == program.len() as i32 {
|
||||
return Some(accumulator);
|
||||
} else if pointer >= program.len() as i32 || pointer < 0 {
|
||||
return None;
|
||||
}
|
||||
visited.insert(pointer);
|
||||
match program[pointer as usize] {
|
||||
Operation::Nop(offset) if flip_pointer == pointer => pointer += offset,
|
||||
Operation::Nop(_) => pointer += 1,
|
||||
Operation::Acc(offset) => {
|
||||
accumulator += offset;
|
||||
pointer += 1;
|
||||
}
|
||||
Operation::Jmp(_) if flip_pointer == pointer => pointer += 1,
|
||||
Operation::Jmp(offset) => pointer += offset,
|
||||
}
|
||||
}
|
||||
None
|
||||
}
|
||||
|
||||
fn solve_part1(input_path: &str) -> Result<i32> {
|
||||
let file = File::open(input_path)?;
|
||||
let reader = BufReader::new(file);
|
||||
let program: Vec<Operation> = reader
|
||||
.lines()
|
||||
.map(|line| Operation::from_str(&line.unwrap()).unwrap())
|
||||
.collect();
|
||||
Ok(find_infinite_loop(&program))
|
||||
}
|
||||
|
||||
fn solve_part2(input_path: &str) -> Result<i32> {
|
||||
let file = File::open(input_path)?;
|
||||
let reader = BufReader::new(file);
|
||||
|
||||
let program: Vec<Operation> = reader
|
||||
.lines()
|
||||
.map(|line| Operation::from_str(&line.unwrap()).unwrap())
|
||||
.collect();
|
||||
|
||||
let mut flip_pointer: i32 = 0;
|
||||
while flip_pointer < program.len() as i32 {
|
||||
if let Some(result) = find_terminated_value(&program, flip_pointer) {
|
||||
return Ok(result);
|
||||
} else {
|
||||
flip_pointer += 1;
|
||||
}
|
||||
}
|
||||
Err(anyhow!("No fix found"))
|
||||
}
|
||||
|
||||
fn main() {
|
||||
println!("Part 1: {}", solve_part1(INPUT).unwrap());
|
||||
println!("Part 2: {}", solve_part2(INPUT).unwrap());
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
const TEST_INPUT: &str = "input/test.txt";
|
||||
|
||||
#[test]
|
||||
fn parses_input() {
|
||||
let file = File::open(TEST_INPUT).unwrap();
|
||||
let reader = BufReader::new(file);
|
||||
|
||||
let instructions: Vec<Operation> = reader
|
||||
.lines()
|
||||
.map(|line| Operation::from_str(&line.unwrap()).unwrap())
|
||||
.collect();
|
||||
|
||||
assert_eq!(
|
||||
instructions,
|
||||
vec![
|
||||
Operation::Nop(0),
|
||||
Operation::Acc(1),
|
||||
Operation::Jmp(4),
|
||||
Operation::Acc(3),
|
||||
Operation::Jmp(-3),
|
||||
Operation::Acc(-99),
|
||||
Operation::Acc(1),
|
||||
Operation::Jmp(-4),
|
||||
Operation::Acc(6),
|
||||
]
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn solves_part1() {
|
||||
assert_eq!(solve_part1(TEST_INPUT).unwrap(), 5);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn solves_part2() {
|
||||
assert_eq!(solve_part2(TEST_INPUT).unwrap(), 8);
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user