Solve day2

day2/part1.py

@@ -0,0 +1,26 @@
+FILE = "input.txt"
+
+def main():
+    line = open(FILE).readlines()[0].strip()
+
+    ranges = [
+        [int(n) for n in l.split("-")]
+        for l in line.split(",")
+    ]
+
+    invalid_ids = [
+        id
+        for (start, end) in ranges
+        for id in range(start, end + 1)
+        if invalid(str(id))
+    ]
+
+    return sum(invalid_ids)
+
+def invalid(id):
+    if len(id) % 2 == 1: return False
+    a, b = id[:(len(id)//2)], id[(len(id)//2):]
+    return a == b
+
+if __name__ == "__main__":
+    print(main())