start 2018

2018/01.py

@@ -0,0 +1,17 @@
+from collections import deque
+
+
+with open('data/01.txt') as f:
+    data = deque([int(r) for r in f])
+
+print(f'Part 1:\n{sum(data)}\n')
+
+seen = set()
+total = 0
+while True: 
+    total += data[0]
+    if total in seen:
+        print(f'Part 2:\n{total}')
+        break
+    seen.add(total)
+    data.rotate(-1)

2018/02.py

@@ -0,0 +1,29 @@
+from collections import Counter
+from itertools import combinations
+
+
+with open('data/02.txt') as f:
+    data = [r.strip() for r in f]
+
+totals = {2: 0, 3: 0}
+for item in data:
+    counter = Counter(item)
+    for n in 2, 3:
+        if n in counter.values():
+            totals[n] += 1
+
+print(f'Part 1:\n{totals[2] * totals[3]}\n')
+
+
+def compare(a, b):
+    different = 0
+    for charA, charB in zip(a, b):
+        if charA != charB:
+            different += 1
+        if different > 1:
+            return False
+    return True
+
+for a, b in combinations(data, 2):
+    if compare(a, b):
+        print(''.join(c for c, d in zip(a, b) if c == d))

2018/data/01.txt

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2018/data/02.txt

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