From 1cbe4112643e15860130ef919fa387813713eb7f Mon Sep 17 00:00:00 2001
From: Gasser Thibaud <thibaud.gasser@externe.e-i.com>
Date: Tue, 8 Dec 2020 09:24:46 +0100
Subject: [PATCH] day 8 challenge

---
 day8/day8.py   |  49 ++++
 day8/input.txt | 608 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 657 insertions(+)
 create mode 100644 day8/day8.py
 create mode 100644 day8/input.txt

diff --git a/day8/day8.py b/day8/day8.py
new file mode 100644
index 0000000..81ed6f0
--- /dev/null
+++ b/day8/day8.py
@@ -0,0 +1,49 @@
+#! /usr/bin/env python3
+
+
+def part1(instructions):
+    instruction_pointer = 0
+    accumulator = 0
+    visited_instructions = set()
+    while instruction_pointer not in visited_instructions:  # return before executing any instruction a second time
+        if instruction_pointer >= len(instructions):  # stop the program when ip is out of bounds
+            break
+        visited_instructions.add(instruction_pointer)
+        instruction, argument = instructions[instruction_pointer].split(" ")
+        if instruction == "acc":
+            accumulator += int(argument)
+            instruction_pointer += 1
+        elif instruction == "jmp":
+            value = int(argument)
+            instruction_pointer += value
+        else:
+            instruction_pointer += 1
+    return instruction_pointer, accumulator
+
+
+def part2(instructions):
+    for index, line in enumerate(instructions):
+        permutation = generate_permutation(instructions, line, index)
+        if permutation is None:
+            continue
+        instruction_pointer, accumulator = part1(permutation)
+        if instruction_pointer == len(permutation):
+            return accumulator
+
+
+def generate_permutation(instructions, line, index):
+    permutation = instructions[:]
+    instruction, arg = line.split(" ")
+    if instruction == "acc":  # don't replace acc operations
+        return
+    elif instruction == "nop":
+        permutation[index] = f"jmp {arg}"
+    elif instruction == "jmp":
+        permutation[index] = f"nop {arg}"
+    return permutation
+
+
+if __name__ == "__main__":
+    instructions = [line.rstrip() for line in open("input.txt")]
+    print("Part 1 : (ip, acc) ", part1(instructions)[1])
+    print("Part 2 : (ip, acc) ", part2(instructions))
diff --git a/day8/input.txt b/day8/input.txt
new file mode 100644
index 0000000..5b247e0
--- /dev/null
+++ b/day8/input.txt
@@ -0,0 +1,608 @@
+jmp +232
+acc +21
+nop +120
+jmp +239
+acc +18
+acc +41
+jmp +72
+acc +47
+jmp +314
+jmp +1
+acc +47
+nop +175
+acc +33
+jmp +115
+nop -5
+acc +37
+acc +25
+acc +18
+jmp +304
+acc +0
+acc +16
+jmp +77
+acc +9
+acc -3
+jmp +93
+acc +16
+acc -15
+jmp +110
+jmp +76
+acc +36
+acc +11
+acc -3
+jmp +258
+jmp +241
+acc +42
+jmp +514
+nop +103
+acc +36
+acc -18
+jmp +47
+acc +5
+acc +37
+jmp +480
+acc -16
+jmp +1
+nop +498
+jmp +1
+jmp +12
+acc +0
+acc +35
+jmp +437
+jmp +326
+acc -15
+acc -7
+nop -2
+jmp +548
+jmp -4
+jmp +395
+jmp +258
+acc +37
+acc +17
+acc -18
+jmp +345
+acc -18
+acc +37
+acc +36
+jmp +217
+acc -4
+acc +39
+jmp -35
+jmp +252
+jmp +1
+nop +91
+jmp +402
+nop -40
+jmp +371
+jmp -72
+jmp +9
+acc +41
+jmp +95
+nop +252
+nop +30
+jmp +240
+nop +266
+jmp +462
+jmp +137
+acc -14
+jmp +203
+jmp +1
+acc +45
+acc -14
+acc -6
+jmp -9
+acc -15
+acc +6
+nop +298
+jmp -56
+jmp +14
+acc +32
+jmp +40
+acc +17
+nop +62
+acc +14
+jmp +119
+acc +49
+jmp -29
+acc +27
+acc -12
+acc +14
+acc +19
+jmp +253
+acc +19
+jmp +345
+acc -17
+acc +39
+jmp +1
+jmp +133
+jmp +268
+acc -14
+acc -16
+acc +45
+jmp +373
+jmp +116
+jmp +245
+acc -19
+acc +32
+jmp -22
+jmp +105
+acc -9
+acc +27
+acc +16
+nop +397
+jmp +110
+acc +13
+acc -10
+acc +10
+jmp -69
+jmp +29
+jmp +94
+acc +38
+acc +49
+acc +40
+jmp +261
+acc +43
+acc -13
+jmp +214
+acc -10
+nop -80
+acc +15
+jmp +228
+acc +0
+jmp +275
+jmp -69
+acc +46
+acc +4
+acc +24
+acc +6
+jmp +279
+acc -9
+nop +281
+jmp +286
+acc -4
+jmp +306
+jmp +342
+acc -14
+jmp +357
+acc -10
+nop -9
+acc +10
+acc +40
+jmp +427
+acc +0
+acc +32
+jmp +405
+acc +45
+acc +34
+nop +281
+acc +34
+jmp +394
+acc +41
+acc +20
+jmp -98
+jmp -60
+acc -3
+acc +17
+jmp +19
+acc +6
+nop +168
+acc +35
+jmp -141
+nop -62
+acc +8
+acc +16
+jmp +117
+acc +34
+acc -8
+acc +35
+acc -15
+jmp +85
+acc +2
+acc -9
+acc -4
+acc +49
+jmp +394
+nop -145
+acc +47
+jmp +16
+acc +10
+acc +0
+jmp +87
+nop -88
+acc -9
+acc -16
+acc +45
+jmp +374
+acc +28
+acc +38
+jmp -139
+acc -13
+acc +13
+jmp +143
+jmp -135
+jmp -4
+jmp -130
+acc +5
+nop -196
+jmp +48
+acc -10
+jmp +149
+acc -14
+jmp +210
+jmp +325
+acc +45
+acc +11
+acc -15
+jmp +97
+nop +107
+jmp -98
+acc -7
+acc -18
+jmp -181
+jmp +122
+acc -15
+jmp -49
+jmp +1
+acc +36
+acc -10
+jmp +1
+jmp +62
+acc +39
+jmp +105
+acc +19
+nop +253
+acc -11
+acc -9
+jmp +77
+acc +50
+acc +3
+acc -18
+acc +17
+jmp +56
+nop -209
+nop +272
+acc -13
+jmp +270
+nop +229
+acc +12
+jmp +1
+jmp -44
+acc -13
+jmp +1
+nop +275
+acc +45
+jmp -254
+acc -2
+acc -2
+nop -148
+jmp -91
+acc +2
+nop -30
+acc -8
+acc +0
+jmp -96
+nop +1
+jmp -74
+acc -19
+acc +10
+acc +26
+acc +30
+jmp -280
+acc +46
+acc -2
+acc -8
+jmp +277
+acc -9
+jmp +205
+acc -13
+acc +10
+jmp +1
+jmp +219
+acc +38
+acc +24
+acc +11
+jmp -129
+jmp -86
+jmp +1
+acc +0
+jmp +1
+acc +46
+jmp -135
+nop +218
+acc -14
+acc +0
+jmp +55
+acc +24
+jmp +213
+acc +19
+acc +16
+jmp -266
+acc +24
+acc +15
+jmp +158
+acc +3
+jmp -94
+acc +16
+acc +24
+acc +42
+jmp +201
+jmp -32
+acc +34
+nop -321
+jmp +212
+acc +12
+acc +41
+jmp -212
+acc +32
+jmp +236
+acc +45
+nop +253
+jmp +129
+nop -3
+acc +38
+jmp +35
+acc -15
+acc +21
+acc -7
+acc -6
+jmp +46
+jmp -5
+acc +5
+acc +4
+acc +42
+jmp +142
+acc +36
+jmp -180
+acc +23
+jmp -46
+acc +12
+jmp +5
+jmp +201
+acc +36
+acc -14
+jmp -30
+jmp -338
+acc +12
+acc +34
+acc +2
+jmp -310
+acc -15
+jmp -104
+jmp -148
+jmp +108
+acc +37
+acc -6
+acc +0
+acc +13
+jmp -324
+acc +49
+acc +37
+acc +37
+jmp +131
+acc +2
+acc +30
+acc +12
+jmp -238
+acc -12
+acc +4
+jmp -155
+acc +45
+acc -10
+nop -168
+nop +114
+jmp +113
+acc +15
+acc +41
+acc +6
+acc +34
+jmp +25
+acc +46
+acc +28
+acc +44
+acc -3
+jmp -70
+acc +2
+acc +37
+jmp -101
+jmp +51
+acc +45
+nop -399
+nop -60
+jmp -391
+acc +41
+jmp -57
+jmp -54
+acc +46
+jmp +90
+acc +6
+jmp +83
+acc +37
+jmp +1
+acc -6
+jmp -189
+acc +0
+jmp -241
+acc +35
+jmp -396
+acc +35
+acc +42
+acc +37
+acc +20
+jmp -81
+nop +74
+acc +41
+acc +23
+jmp +1
+jmp -349
+jmp -232
+acc +37
+acc +24
+jmp +121
+jmp -144
+acc +35
+acc +39
+acc -12
+acc +14
+jmp -113
+acc +2
+acc +29
+acc -6
+acc +0
+jmp -326
+jmp -426
+acc +18
+acc +39
+acc +22
+jmp +79
+jmp +23
+acc -17
+nop +42
+acc -8
+jmp -47
+acc -12
+jmp -276
+jmp -126
+acc +20
+acc +3
+acc +41
+jmp -31
+acc -1
+jmp +1
+jmp -241
+acc +9
+acc +12
+acc +0
+jmp +26
+acc +30
+nop +46
+jmp -134
+jmp -361
+acc +50
+nop -1
+nop -225
+jmp -226
+acc +42
+acc +0
+jmp +1
+jmp -170
+acc +14
+acc +19
+jmp -199
+nop +15
+acc -11
+acc +20
+jmp -161
+nop -348
+acc -6
+acc +49
+jmp -468
+acc +11
+jmp -413
+acc -11
+acc -1
+acc +45
+jmp -181
+jmp -380
+nop -128
+acc +40
+jmp -179
+acc -9
+acc +24
+jmp -358
+acc +50
+acc +13
+acc -15
+jmp +14
+acc +4
+acc +12
+jmp -365
+nop -269
+jmp -443
+nop -224
+jmp -108
+acc +46
+acc -11
+jmp -515
+acc -8
+nop -284
+jmp -444
+acc +15
+nop -11
+jmp -288
+acc +28
+acc +35
+jmp -416
+acc +27
+acc -8
+acc -10
+acc +0
+jmp -167
+acc -9
+acc +42
+acc +20
+jmp -63
+jmp -107
+acc -6
+jmp -335
+jmp -460
+acc -2
+jmp -420
+acc +27
+acc +6
+jmp -458
+acc +31
+nop +19
+nop -396
+jmp -479
+nop -234
+acc +42
+jmp -142
+jmp -511
+nop +28
+acc -9
+acc +36
+acc +38
+jmp +27
+acc -3
+acc +9
+acc -19
+acc +3
+jmp -133
+jmp -503
+jmp -267
+acc +40
+acc +41
+acc +13
+nop -492
+jmp -327
+jmp -339
+acc +17
+acc +4
+acc +45
+acc +13
+jmp -419
+acc +31
+acc +0
+acc +37
+acc -13
+jmp -210
+jmp -517
+acc -15
+jmp -47
+acc -16
+jmp -129
+acc +16
+nop -455
+nop -263
+jmp -74
+acc +5
+acc +20
+acc +45
+acc +23
+jmp -490
+jmp -53
+acc +40
+jmp +1
+acc -14
+acc -1
+jmp +1
\ No newline at end of file