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First solution in Clear category for The Square Chest by flpo
def checkio(lines):
points = ([1, 2, 3, 5, 6, 7, 9, 10, 11], [1, 2, 5, 6], [1])
lines = [set(line) for line in lines]
def has_square(start, n):
for off in 1, 4, -1, -4:
for step in range(n):
if {start, start + off} not in lines:
return False
start += off
return True
return sum(has_square(p, n+1) for n in range(3) for p in points[n])
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"
April 14, 2017
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