Day 03 (glamorized)

day03/part1.py

@@ -1,13 +1,10 @@
 #!/usr/bin/env python3
+from collections import Counter
 
-lines = (x.strip() for x in open("input.txt"))
+lines = [x.strip() for x in open("input.txt")]
 
-cnt = [0] * 12
+most_common = (Counter(column).most_common(1)[0][0] for column in zip(*lines))
+gamma = int("".join(most_common), 2)
+epsilon = 2**12-1 ^ gamma
 
-for line in lines:
-    cnt = [x+(int(char)*2-1) for x, char in zip(cnt, line)]
-
-gamma = int(''.join(['1' if x > 0 else '0' for x in cnt]), 2)
-epsilon = int(''.join(['1' if x < 0 else '0' for x in cnt]), 2)
-
-print(gamma * epsilon)
+print(gamma * epsilon)