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Painting with Unions solution in 3rd party category for Painting Wall by PythonWithPI
def checkio(required, operations):
from sympy import Union, Interval
from itertools import accumulate,starmap
for num,u in enumerate(accumulate(starmap(Interval,operations),Union)):
if u.measure>=required-1:
return num+1
return -1
if __name__ == '__main__':
#These "asserts" using only for self-checking and not necessary for auto-testing
assert checkio(5, [[1, 5], [11, 15], [2, 14], [21, 25]]) == 1, "1st"
assert checkio(6, [[1, 5], [11, 15], [2, 14], [21, 25]]) == 2, "2nd"
assert checkio(11, [[1, 5], [11, 15], [2, 14], [21, 25]]) == 3, "3rd"
assert checkio(16, [[1, 5], [11, 15], [2, 14], [21, 25]]) == 4, "4th"
assert checkio(21, [[1, 5], [11, 15], [2, 14], [21, 25]]) == -1, "not enough"
assert checkio(1000000011, [[1, 1000000000], [11, 1000000010]]) == -1, "large"
Sept. 13, 2016
