diff options
Diffstat (limited to '5/2.py')
-rw-r--r-- | 5/2.py | 24 |
1 files changed, 24 insertions, 0 deletions
@@ -0,0 +1,24 @@ +from collections import defaultdict +def check(w): + pairs = defaultdict(list) + rep = False + last2 = (None, None) + for i, c in enumerate(w): + if last2[1] is not None: + pairs[(last2[1], c)].append(i) + if not rep and last2[0] == c: + rep = True + last2 = (last2[1], c) + if not rep: + return False + for _, p in pairs.items(): + if len(p) < 2: + continue + if len(p) > 2: + break + if p[1] - p[0] > 1: + break + else: + return False + return True +print(len([w for w in open('input') if check(w)])) |