diff --git a/2020/08/input.txt b/2020/08/input.txt
new file mode 100644
index 0000000..283b8eb
--- /dev/null
+++ b/2020/08/input.txt
@@ -0,0 +1,683 @@
+acc +42
+acc -12
+nop +112
+acc +47
+jmp +600
+acc +21
+jmp +1
+acc +0
+acc +50
+jmp +16
+acc +10
+jmp +56
+acc -5
+nop +179
+nop +36
+jmp +341
+acc -12
+nop +580
+acc -9
+jmp +112
+acc +12
+acc +6
+acc +40
+acc +1
+jmp +237
+acc +50
+jmp +61
+nop +542
+jmp +644
+nop +598
+nop +280
+acc +34
+acc +10
+jmp +486
+acc +34
+nop +152
+acc +35
+jmp +629
+acc +37
+jmp +447
+acc +50
+nop +522
+acc +43
+jmp +271
+jmp +451
+acc +27
+jmp +1
+acc +24
+nop +532
+jmp +494
+acc +39
+acc -10
+acc +42
+acc -9
+jmp +54
+acc +36
+jmp +236
+acc +34
+acc +47
+nop +613
+acc +27
+jmp +561
+acc +3
+acc -5
+acc +11
+acc +19
+jmp +111
+acc +32
+nop -52
+jmp +108
+acc -16
+acc +40
+jmp +207
+nop -44
+acc +47
+jmp +159
+nop +150
+acc +43
+acc +7
+jmp +200
+nop +141
+acc +2
+jmp +487
+acc +27
+nop +122
+nop +519
+jmp +22
+nop +27
+nop +251
+acc -2
+jmp +171
+acc -11
+jmp +242
+acc +14
+acc -11
+jmp +540
+acc -5
+acc +47
+acc +14
+jmp +252
+acc +34
+acc +28
+acc +1
+jmp +311
+jmp +1
+acc +28
+acc +0
+jmp +321
+acc +23
+acc +8
+acc +26
+acc +0
+jmp +202
+jmp +541
+acc +21
+acc -9
+acc +7
+jmp +81
+acc +5
+acc +31
+acc -16
+jmp +56
+acc -1
+acc +21
+acc +45
+acc -7
+jmp +278
+acc +0
+acc +2
+acc -4
+jmp +514
+acc -1
+acc -16
+acc +32
+jmp +248
+acc +25
+jmp +333
+acc -18
+acc +0
+acc +25
+acc +43
+jmp +416
+acc +18
+nop -127
+acc +37
+acc -4
+jmp +495
+nop +16
+jmp +1
+jmp +320
+acc +22
+jmp +453
+acc -3
+nop +519
+nop +49
+jmp +32
+jmp -89
+acc +11
+acc +31
+jmp +454
+acc +12
+acc +32
+jmp +283
+acc -2
+nop +411
+jmp -65
+acc +0
+nop +25
+acc +5
+acc +0
+jmp +284
+acc -15
+jmp +1
+jmp +166
+acc +27
+acc +50
+jmp +91
+jmp -104
+nop +71
+jmp +358
+acc +15
+acc +1
+jmp -60
+acc +20
+acc +6
+acc +10
+jmp +228
+acc -3
+jmp +316
+acc +5
+acc +11
+jmp +254
+acc -3
+acc +20
+jmp +194
+acc +9
+acc -8
+jmp +6
+acc +30
+jmp +376
+acc -19
+acc -8
+jmp -122
+jmp +3
+nop -41
+jmp -68
+jmp -119
+nop +434
+acc -16
+nop -199
+acc +37
+jmp +68
+acc +3
+acc +18
+acc +38
+acc -8
+jmp +327
+nop +110
+acc +9
+acc +31
+jmp -8
+jmp +130
+acc +20
+acc -1
+nop +16
+jmp +24
+nop +14
+nop -40
+nop -57
+acc +10
+jmp +239
+nop +164
+nop +196
+jmp -208
+acc -12
+jmp +284
+acc +10
+acc +27
+jmp +1
+jmp -195
+acc +1
+acc +10
+acc +25
+acc -17
+jmp +25
+acc +42
+acc +1
+acc -3
+jmp -148
+jmp -28
+acc +34
+nop -222
+acc +3
+acc +15
+jmp +115
+acc +26
+acc +36
+acc +33
+jmp -248
+acc -14
+jmp -89
+acc +19
+acc -14
+acc +34
+jmp +380
+jmp +1
+jmp -5
+jmp +187
+jmp +236
+acc -4
+acc +47
+jmp +2
+jmp +232
+jmp +1
+acc -8
+jmp +397
+acc +7
+acc +2
+jmp +136
+jmp +325
+acc +11
+acc -17
+acc -4
+jmp -43
+acc +20
+acc -9
+jmp +60
+acc +36
+acc +49
+nop +333
+acc +38
+jmp -169
+acc +2
+acc +8
+jmp +82
+acc +6
+jmp -159
+acc +25
+acc +23
+acc +18
+acc +41
+jmp -138
+jmp -145
+acc +49
+acc +37
+jmp +123
+acc +2
+nop +179
+acc -19
+jmp -152
+jmp -294
+acc +50
+acc +50
+jmp -46
+acc +17
+jmp -158
+acc -11
+acc +5
+acc -6
+jmp +278
+acc +3
+acc +26
+acc +27
+acc +24
+jmp -69
+acc +22
+jmp +204
+acc +15
+acc +49
+acc +1
+acc +22
+jmp +149
+acc +31
+jmp +131
+jmp -309
+acc +40
+acc +39
+acc +44
+jmp -216
+acc +15
+acc +17
+jmp +54
+nop +157
+acc +24
+acc +18
+jmp -111
+acc -6
+jmp +22
+acc +17
+acc -3
+jmp -228
+acc -2
+acc +41
+jmp +235
+nop +234
+jmp -82
+nop -83
+acc +44
+acc +39
+nop +216
+jmp -180
+jmp -163
+acc +13
+acc +0
+jmp +1
+jmp +301
+acc +14
+nop -187
+jmp -181
+acc +48
+nop +169
+acc +27
+jmp -334
+nop -226
+acc +3
+jmp -61
+jmp +1
+acc -15
+jmp -175
+acc +9
+acc +19
+jmp +223
+acc +20
+acc +39
+acc +50
+acc +13
+jmp -119
+jmp +240
+acc +50
+acc +40
+acc -14
+jmp +236
+acc +0
+acc +0
+jmp +34
+acc +20
+acc -3
+nop -136
+acc +4
+jmp -370
+acc +38
+acc +25
+acc +9
+jmp -240
+jmp +1
+acc -10
+acc +21
+acc +46
+jmp +118
+acc -8
+acc +12
+nop +64
+acc +0
+jmp +253
+acc +32
+acc -6
+acc +44
+jmp +115
+acc +36
+acc +23
+acc +21
+nop +88
+jmp -275
+acc +8
+jmp -127
+acc +5
+acc +42
+jmp +82
+acc +41
+acc +31
+acc +45
+acc +20
+jmp +131
+acc +21
+acc +7
+jmp +97
+acc +12
+acc +0
+nop +61
+acc +36
+jmp -106
+acc +20
+acc -1
+acc -14
+jmp -210
+acc -12
+acc -19
+acc -19
+jmp -25
+acc -11
+nop -247
+acc +0
+acc +7
+jmp -290
+acc +36
+acc +43
+acc +8
+nop -154
+jmp -102
+acc +8
+acc +31
+acc +44
+acc -5
+jmp -184
+jmp -252
+acc +50
+acc +18
+acc +5
+jmp -141
+jmp -159
+acc -4
+acc +8
+acc +4
+acc -5
+jmp +56
+acc +19
+acc +46
+jmp +53
+acc +45
+jmp -316
+acc -5
+acc -1
+nop +98
+jmp +195
+jmp +1
+jmp +58
+acc +15
+nop -471
+acc +14
+jmp +48
+nop -269
+nop +8
+nop -223
+acc +24
+jmp -288
+jmp +85
+nop -1
+jmp +1
+jmp +45
+acc +48
+nop -490
+acc +0
+jmp +37
+jmp +132
+acc +5
+jmp -256
+acc +12
+acc +22
+jmp -479
+acc +15
+nop -56
+acc -18
+acc -6
+jmp -157
+nop +16
+acc +5
+acc +26
+acc +42
+jmp -172
+acc -13
+acc -2
+jmp -237
+acc +9
+acc -10
+acc -16
+jmp +32
+acc +11
+acc +3
+jmp -208
+jmp -449
+jmp -383
+jmp +96
+acc -9
+acc -14
+jmp -30
+nop -36
+jmp +21
+jmp +117
+jmp -169
+jmp -387
+acc -5
+acc -9
+jmp -344
+acc +13
+acc +4
+acc +45
+jmp -219
+acc +9
+acc +44
+acc +31
+acc +16
+jmp -71
+jmp -77
+acc -1
+acc +40
+acc +31
+jmp -385
+acc +1
+jmp -255
+nop -20
+acc +0
+acc +29
+jmp -180
+acc +13
+acc +5
+nop -292
+jmp -204
+acc +30
+jmp -265
+acc +19
+acc +31
+jmp -457
+acc +16
+acc +27
+jmp +67
+jmp +88
+acc +20
+acc +44
+acc +27
+jmp -40
+acc +26
+acc +48
+acc +28
+acc -12
+jmp -120
+acc -9
+acc +42
+jmp -543
+acc +4
+nop +83
+acc +41
+jmp -28
+acc +40
+acc -17
+acc +14
+acc -6
+jmp -70
+nop -294
+acc -10
+acc +9
+acc +7
+jmp -322
+jmp +1
+jmp -46
+acc +0
+acc +38
+acc +6
+jmp -381
+acc +49
+acc -16
+acc +35
+acc +45
+jmp -184
+acc -6
+acc -13
+acc +9
+jmp -180
+acc +18
+acc +49
+acc -4
+nop -197
+jmp -395
+nop -266
+jmp -530
+acc +16
+acc +9
+jmp -117
+acc -4
+acc -7
+acc +44
+acc +35
+jmp -122
+acc +31
+acc -5
+jmp -503
+jmp -555
+acc +19
+acc +25
+acc -10
+acc +50
+jmp -493
+jmp -591
+acc +40
+jmp -491
+nop +28
+nop -48
+acc +11
+nop -25
+jmp -591
+jmp +1
+acc -15
+acc +21
+acc +46
+jmp -199
+jmp +1
+acc +42
+acc +10
+acc -11
+jmp -213
+acc -8
+acc +2
+acc +36
+jmp -470
+acc +37
+jmp -195
+jmp -38
+acc +17
+jmp -26
+nop -376
+acc +27
+acc +11
+jmp -185
+acc +44
+acc +12
+acc +9
+acc +14
+jmp -626
+jmp -89
+acc +45
+acc +23
+acc +13
+acc +19
+jmp +1
diff --git a/2020/08/python.py b/2020/08/python.py
new file mode 100644
index 0000000..eec5d39
--- /dev/null
+++ b/2020/08/python.py
@@ -0,0 +1,92 @@
+import re
+# from typing import Tuple
+
+from aocd import submit
+
+with open("input.txt") as f:
+    # List of tuples
+    # [('nop', '+0'), ...]
+    bootcode = [ tuple(line.strip().split()) for line in f.readlines() ]
+
+
+ran_indexes = []  # List of bootcode indexes that have been run
+
+def runcode(i: int = 0, acc: int = 0, reset: bool = False, flip_index: int = -1) -> tuple[int, bool]:
+    """Run the boot code, return final acc value, and whether it properly terminates
+
+    Parameters:
+        i          (int)   index
+        acc        (int)   acc value
+        reset      (bool)  whether to reset the list of indexes of codes already ran
+        flip_index (int)   the index of bootcode to which should flip nop/jmp
+                           (set to -1 or under for none). The actual left operand of the
+                           bootcode at index flip_index does not need to actually be nop/jmp
+
+    Returns: Tuple of the final acc value, and whether it loops infinitely.
+    """
+    global ran_indexes
+    # Success means, pointer have reached end of boot code, hence it terminates successfully
+    if i == len(bootcode):
+        return acc, False
+    if reset: ran_indexes = []
+
+    # It's an infinite loop as the current line of boot code has already been run before
+    if i in ran_indexes:
+        return acc, True
+
+    # Begin runnign the current bootcode line
+    ran_indexes.append(i)
+    op, arg = bootcode[i]
+    arg = int(arg)
+
+    # Flip nop/jmp
+    # if (op in (nj:=('nop', 'jmp'))) and i == flip_index:
+    #     op = nj[(nj.index(op)+1)%2]
+    op = nj[(nj.index(op)+1)%2] if op in (nj := ('nop', 'jmp')) and i == flip_index else op
+
+    # Finally, parse the code.
+    # Possible op codes:
+    # - acc: add arg to the acc
+    # - jmp: jump arg lines in the boot code to run another instruction
+    # - nop: no operation
+    if    op == 'acc':  acc += arg
+    elif  op == 'jmp':  return runcode(i+arg, acc, flip_index=flip_index)
+    # Proceed to next line (for acc and nop)
+    return runcode(i+1, acc, flip_index=flip_index)
+
+
+# False as ran_indexes was newly initiated - avoid extra assignment of new list object
+print(a := runcode()[0])
+submit(a, "a", 8, 2020)
+
+inf = True; i = 0
+while inf:
+    if i == len(bootcode):
+        print("FAIL"); break
+    a, inf = runcode(reset=True, flip_index=i)
+    i += 1
+
+print(a)
+submit(a, "b", 8, 2020)
+
+
+# Old impl
+
+# part 2
+# one of the nop instructions changed to jmp, or vice verse, so that the program terminates without infinite looping
+# oldcode = bootcode.copy()
+# i = -1
+# while not term:
+#     bootcode[i] = oldcode[i]
+#     i += 1
+#     if i == len(bootcode):
+#         print("FAIL")
+#         break
+#     op, arg = bootcode[i]
+#     if op != 'acc':
+#         bootcode[i] = ('jmp' if op == 'nop' else 'nop', arg)
+#     else:
+#         old = tuple()
+#         continue
+#     ran_indexes = []
+#     a, term = runcode2(0, 0)