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#!/usr/bin/env python3
import aoc20
import sys
from collections import deque
def intify(_in):
return list(int(n.strip()) for n in _in)
def first_invalid(nums):
valid = []
for i in range(25):
for j in range(i+1, 25):
valid.append(nums[i] + nums[j])
for i in range(25, len(nums)):
if nums[i] not in valid:
return nums[i]
valid = valid[24:]
offset = 0
for j in range(1, 25)[::-1]:
valid.insert(offset, nums[i - j] + nums[i])
offset += j
def pt1(_in):
return first_invalid(intify(_in))
def pt2(_in):
_in = intify(_in)
invalid = first_invalid(_in)
i, s, nums = 0, 0, deque()
while s != invalid:
if s < invalid:
# add
s += _in[i]
nums.append(_in[i])
i += 1
else:
# pop
s -= nums[0]
nums.popleft()
return min(nums) + max(nums)
if __name__ == "__main__":
input = aoc20.read_input(sys.argv[1:], 9)
print(pt1(input))
print(pt2(input))
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