Day 04

day04/part1.py

@@ -0,0 +1,13 @@
+#!/usr/bin/env python3
+
+lines = (x.strip() for x in open("input.txt"))
+result = 0
+
+for line in lines:
+    winnings = set(int(x.strip()) for x in line[line.find(":")+1:line.find("|")].split(" ") if len(x))
+    you_have = set(int(x.strip()) for x in line[line.find("|")+1:].split(" ") if len(x))
+    num_overlap = len(you_have.intersection(winnings))
+    if num_overlap > 0:
+        result += 2**(num_overlap-1)
+
+print(result)