finished day20, skipped 19 for now

day20-2.py

@@ -0,0 +1,34 @@
+with open('input20.txt','r') as f:
+    inp = f.read().splitlines(keepends=False)
+
+sequence = []
+decryptionKey = 811589153
+
+for i in range(len(inp)):
+    if int(inp[i]) == 0:
+        zero = (i, int(inp[i]))
+    sequence.append((i, int(inp[i]) * decryptionKey))
+numbers = sequence.copy()
+
+for number in sequence:
+    if sequence.count(number) > 1:
+        print('!')
+
+for i in range(10):
+    for number in numbers:
+        index = sequence.index(number)
+        _number = number[1]
+        newIndex = index + _number
+        sequence.pop(index)
+        newIndex %= len(sequence)
+        sequence.insert(newIndex, number)
+
+number = sequence.index(zero) + 1000
+_sum = 0
+for i in range(3):
+    number %= len(sequence)
+    #print(sequence[number])
+    _sum += sequence[number][1]
+    number += 1000
+
+print(_sum)