2016/7

y2016/p06.py

@@ -0,0 +1,12 @@
+import sys
+from collections import Counter
+
+
+grid = sys.stdin.read().splitlines()
+transpose = list(zip(*grid))
+
+ans1 = ''.join(Counter(line).most_common()[0][0] for line in transpose)
+print(ans1)
+
+ans2 = ''.join(Counter(line).most_common()[-1][0] for line in transpose)
+print(ans2)

y2016/p07.py

@@ -0,0 +1,28 @@
+import re
+import sys
+
+
+def is_tls(line):
+    rx = re.compile(r'(\w)(\w)\2\1')
+    parts = re.split(r'\[(.+?)\]', line)
+    good = [m for p in parts[::2] for m in rx.findall(p) if m[0] != m[1]]
+    bad = [m for p in parts[1::2] for m in rx.findall(p) if m[0] != m[1]]
+    return bool(good and not bad)
+
+
+def is_ssl(line):
+    rx = re.compile(r'(?=(\w)(\w)\1)')
+    parts = re.split(r'\[(.+?)\]', line)
+    good = {m for p in parts[::2] for m in rx.findall(p) if m[0] != m[1]}
+    bad = {m[::-1] for p in parts[1::2] for m in rx.findall(p) if m[0] != m[1]}
+    return bool(good & bad)
+
+
+ans1 = 0
+ans2 = 0
+text = sys.stdin.read()
+for line in text.strip().splitlines():
+    ans1 += is_tls(line)
+    ans2 += is_ssl(line)
+print(ans1)
+print(ans2)