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Generator & sum of subset solution in Clear category for The Square Chest by Sim0000
def checkio(lines_list):
pos = lambda y, x: 4 * y + x + 1
def g(size):
"square generator"
for y in range(4 - size):
for x in range(4 - size):
lines = set()
for d in range(size):
lines.add(frozenset((pos(y, x + d), pos(y, x + d + 1))))
lines.add(frozenset((pos(y + d, x), pos(y + d + 1, x))))
lines.add(frozenset((pos(y + size, x + d), pos(y + size, x + d + 1))))
lines.add(frozenset((pos(y + d, x + size), pos(y + d + 1, x + size))))
yield lines
data = set(map(frozenset, lines_list))
return sum(square <= data for size in range(1, 4) for square in g(size))
if __name__ == '__main__':
assert (checkio([[1, 2], [3, 4], [1, 5], [2, 6], [4, 8], [5, 6], [6, 7],
[7, 8], [6, 10], [7, 11], [8, 12], [10, 11],
[10, 14], [12, 16], [14, 15], [15, 16]]) == 3), "First, from description"
assert (checkio([[1, 2], [2, 3], [3, 4], [1, 5], [4, 8],
[6, 7], [5, 9], [6, 10], [7, 11], [8, 12],
[9, 13], [10, 11], [12, 16], [13, 14], [14, 15], [15, 16]]) == 2), "Second, from description"
assert (checkio([[1, 2], [1, 5], [2, 6], [5, 6]]) == 1), "Third, one small square"
assert (checkio([[1, 2], [1, 5], [2, 6], [5, 9], [6, 10], [9, 10]]) == 0), "Fourth, it's not square"
assert (checkio([[16, 15], [16, 12], [15, 11], [11, 10],
[10, 14], [14, 13], [13, 9]]) == 0), "Fifth, snake"
Nov. 28, 2017
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