From 4cc675c580ec24d67c66d2b5a65266b7c036a312 Mon Sep 17 00:00:00 2001
From: npc-strider <npc.strider@gmail.com>
Date: Tue, 8 Dec 2020 16:06:47 +0800
Subject: [PATCH] advent of code day 8

---
 8/a.py | 22 ++++++++++++++++++++++
 8/b.py | 41 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 63 insertions(+)
 create mode 100644 8/a.py
 create mode 100644 8/b.py

diff --git a/8/a.py b/8/a.py
new file mode 100644
index 0000000..4c5ce26
--- /dev/null
+++ b/8/a.py
@@ -0,0 +1,22 @@
+
+ACC = 0
+INDEX = 0
+
+indices = []
+
+lines = [ [y[0],int(y[1])] for x in open('input').read().splitlines() if (y := x.split(' ')) ]
+
+while INDEX not in indices:
+    instruction = lines[INDEX][0]
+    arg0 = lines[INDEX][1]
+    print(instruction + '       ' + str(arg0) + '       ' + str(ACC) + '        ' + str(INDEX) )
+    if instruction == 'nop':
+        True
+    elif instruction == 'acc':
+        ACC += arg0
+    elif instruction == 'jmp':
+        INDEX += arg0 - 1
+    indices.append(INDEX)
+    INDEX += 1
+
+    
\ No newline at end of file
diff --git a/8/b.py b/8/b.py
new file mode 100644
index 0000000..2d2ca99
--- /dev/null
+++ b/8/b.py
@@ -0,0 +1,41 @@
+import copy
+
+instructions = [ [y[0],int(y[1])] for x in open('input').read().splitlines() if (y := x.split(' ')) ]
+
+def interpreter(instructions):    
+    ACC = 0
+    INDEX = 0
+    indices = []
+    while True:
+        if INDEX in indices:
+            return False
+        elif INDEX == len(instructions):
+            return ACC
+            # return True
+        else:
+            instruction = instructions[INDEX][0]
+            arg0 = instructions[INDEX][1]
+            # print(instruction + '       ' + str(arg0) + '       ' + str(ACC) + '        ' + str(INDEX) )
+            if instruction == 'nop':
+                True
+            elif instruction == 'acc':
+                ACC += arg0
+            elif instruction == 'jmp':
+                INDEX += arg0 - 1
+            indices.append(INDEX)
+            INDEX += 1
+
+for i in range(0,len(instructions)):
+    instructions_ = copy.deepcopy(instructions)
+    instruction = instructions_[i][0]
+    if instruction == 'jmp':
+        instructions_[i][0] = 'nop'
+        print('jmp -> nop   ' + str(i))
+    elif instruction == 'nop' and instructions_[i][1] != 0:
+        print('nop -> jmp   ' + str(i))
+        instructions_[i][0] = 'jmp'
+    
+    c = interpreter(instructions_)
+    if c != False:
+        print(c) #758???
+        break