.gitignore

@@ -1,2 +0,0 @@
-*.in
-*.ex*

day02.py

@@ -1,35 +0,0 @@
-import fileinput
-from functools import reduce
-
-def main():
-    part1 = 0
-    part2 = 0
-
-    for i, line in enumerate(fileinput.input()):
-        line = line.strip()
-        subsets = line.split(": ")[1].split("; ")
-
-        maxes = {}
-
-        part1_possible = True
-        for subset in subsets:
-            for balls in subset.split(", "):
-                count, color = balls.split()
-                count = int(count)
-                maxes[color] = max(maxes.get(color, 0), count)
-                part1_possible = (
-                    part1_possible
-                    and (color != "red" or count <= 12)
-                    and (color != "green" or count <= 13)
-                    and (color != "blue" or count <= 14)
-                )
-
-        if part1_possible:
-            part1 += i + 1
-
-        power = reduce(lambda x, y: x * y, maxes.values())
-        part2 += power
-
-    print(part1, part2)
-
-main()

day04.py

@@ -1,27 +1,24 @@
 import fileinput
 
-def main():
+#
-    #
+# Part 1
-    # Part 1
+#
-    #
+cards = []
-    cards = []
+part1 = 0
-    part1 = 0
+for i, line in enumerate(fileinput.input()):
-    for line in fileinput.input():
+    card = line.rstrip().split(": ")[1]
-        card = line.split(": ", 1)[1]
+    (winning, owned) = ({int(i) for i in h.split()} for h in card.split(" | "))
-        (winning, owned) = ({int(i) for i in h.split()} for h in card.split(" | ", 1))
+    count = len(winning & owned)
-        count = len(winning & owned)
+    cards.append(count)
-        cards.append(count)
+    part1 += 1 << count - 1 if count else 0
-        part1 += 1 << count - 1 if count else 0
 
-    #
+#
-    # Part 2
+# Part 2
-    #
+#
-    dp = [0] * len(cards)
+dp = [0] * len(cards)
-    part2 = 0
+part2 = 0
-    for i in range(len(cards)):
+for i in range(len(cards)):
-        dp[i] = 1 + sum(dp[i - cards[-i - 1] : i])
+    dp[i] = 1 + sum(dp[i - cards[-i - 1] : i])
-        part2 += dp[i]
+    part2 += dp[i]
 
-    print(part1, part2)
+print(part1, part2)
-
-main()