Day 2

day02/part1.py

@@ -0,0 +1,15 @@
+import re
+
+#2-5 m: mfvxmmm
+regex = re.compile(r'(\d+)-(\d+) (\w): (\w+)', re.I)
+items = (re.match(regex, x).groups() for x in open("input.txt"))
+items = map(lambda x: [int(x[0]), int(x[1]), *x[2:]], items)
+
+
+def in_range(lower, upper, char, string):
+    cnt_range = sum(1 for s in string if char == s)
+    return lower <= cnt_range <= upper
+
+
+count = sum(1 for x in items if in_range(*x))
+print(count)

day02/part2.py

@@ -0,0 +1,15 @@
+import re
+
+#2-5 m: mfvxmmm
+regex = re.compile(r'(\d+)-(\d+) (\w): (\w+)', re.I)
+items = (re.match(regex, x).groups() for x in open("input.txt"))
+items = map(lambda x: [int(x[0]), int(x[1]), *x[2:]], items)
+
+
+def in_range(lower, upper, char, string):
+    cnt_range = sum(1 for s in string[lower-1]+string[upper-1] if char == s)
+    return cnt_range == 1
+
+
+count = sum(1 for x in items if in_range(*x))
+print(count)