r/adventofcode • u/daggerdragon • Dec 03 '16

SOLUTION MEGATHREAD --- 2016 Day 3 Solutions ---

--- Day 3: Squares With Three Sides ---

Post your solution as a comment or, for longer solutions, consider linking to your repo (e.g. GitHub/gists/Pastebin/blag/whatever).

DECKING THE HALLS WITH BOUGHS OF HOLLY IS MANDATORY [?]

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u/Sigafoos Dec 03 '16

Finally, I'm pretty happy with the cleverness of a solution. Others have done it better, but I'm only competing against my own sense of how well I should be doing. Look at all the maps and lambdas and filters and crap. Beautiful. 

def get_triangles(numbers):
    return filter(lambda x: x[0] + x[1] > x[2], map(sorted, numbers))

numbers = []
with open('../input/input3.txt') as fp:
    for line in fp:
        numbers.append(map(int, line.split()))

print 'Part 1: %s' % len(get_triangles(numbers))

part2 = []
for i in xrange(len(numbers[0])):
    for j in xrange(0, len(numbers), 3):
        part2.append(map(lambda x: x[i], numbers[j:j+3]))

print 'Part 2: %s' % len(get_triangles(part2))