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#!/usr/bin/env python
from collections import deque
pairs = {
"(" : ")",
"[" : "]",
"{" : "}",
"<" : ">"
}
scores = {
")": 3,
"]": 57,
"}": 1197,
">": 25137
}
scores2 = {
")": 1,
"]": 2,
"}": 3,
">": 4
}
# part 1
score = 0
completion_scores = []
with open("day10.txt") as data:
for line in data:
stack = deque()
invalid = False
for char in line.strip():
if char in pairs.keys():
stack.append(char)
if char in pairs.values():
if len(stack) == 0 or pairs[stack[-1]] != char:
score += scores[char]
invalid = True
break
elif pairs[stack[-1]] == char:
stack.pop()
# part 2
if not invalid:
total = 0
while stack:
total = (5 * total) + scores2[pairs[stack.pop()]]
completion_scores.append(total)
print(score)
completion_scores.sort()
print(completion_scores[(len(completion_scores) - 1) // 2])
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