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5 lines solution in Creative category for Multiple Lightbulbs by CDG.Axel
# Taken from mission Lightbulb End Watching
from datetime import datetime
from typing import List, Optional, Union, Tuple
def sum_light(els: List[Union[datetime, Tuple[datetime, int]]],
start_watching: Optional[datetime] = None,
end_watching: Optional[datetime] = None) -> int:
"""
how long the light bulb has been turned on
"""
ew, switch, on = end_watching or datetime(9999,12,31), [False] * 10, []
for idx, e in enumerate(e if type(e) is tuple else (e, 0) for e in els):
switch[e[1]] = not switch[e[1]]
els[idx], _ = min(ew, max(e[0], start_watching or datetime(1,1,1))), on.append(any(switch))
return sum(on[i] * (e[1] - e[0]).total_seconds() for i, e in enumerate(zip(els, els[1:]+[ew])))
"""
# my first solution
# replace elements with no bulb index
els = [(e, 0) if type(e) is datetime else e for e in els]
sw = start_watching if start_watching else els[0][0]
ew = end_watching if end_watching else els[-1][0]
# determine what intervals any lamp is on
on, switch = [], [False] * 10
for e in els:
switch[e[1]] = not switch[e[1]]
on.append(any(switch))
# then sum all intervals where any lamp is on
els += [(ew, 0)]
return sum(on[i] * (min(ew, max(els[i+1][0], sw)) - min(ew, max(els[i][0], sw))).total_seconds()
for i in range(len(on)))
"""
if __name__ == '__main__':
print("Example:")
print(sum_light(els=[
(datetime(2015, 1, 12, 10, 0, 10), 3),
datetime(2015, 1, 12, 10, 0, 20),
(datetime(2015, 1, 12, 10, 0, 30), 3),
(datetime(2015, 1, 12, 10, 0, 30), 2),
datetime(2015, 1, 12, 10, 0, 40),
(datetime(2015, 1, 12, 10, 0, 50), 2),
], start_watching=datetime(2015, 1, 12, 10, 0, 0), end_watching=datetime(2015, 1, 12, 10, 1, 0)))
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
(datetime(2015, 1, 12, 10, 0, 0), 2),
datetime(2015, 1, 12, 10, 0, 10),
(datetime(2015, 1, 12, 10, 1, 0), 2),
]) == 60
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 0, 10),
(datetime(2015, 1, 12, 11, 0, 0), 2),
(datetime(2015, 1, 12, 11, 1, 0), 2),
]) == 70
assert sum_light([
datetime(2015, 1, 12, 10, 0, 20),
(datetime(2015, 1, 12, 10, 0, 30), 2),
datetime(2015, 1, 12, 10, 0, 40),
(datetime(2015, 1, 12, 10, 0, 50), 2),
]) == 30
assert sum_light([
(datetime(2015, 1, 12, 10, 0, 10), 3),
datetime(2015, 1, 12, 10, 0, 20),
(datetime(2015, 1, 12, 10, 0, 30), 3),
(datetime(2015, 1, 12, 10, 0, 30), 2),
datetime(2015, 1, 12, 10, 0, 40),
(datetime(2015, 1, 12, 10, 0, 50), 2),
]) == 40
assert sum_light([
(datetime(2015, 1, 12, 10, 0, 10), 3),
datetime(2015, 1, 12, 10, 0, 20),
(datetime(2015, 1, 12, 10, 0, 30), 3),
(datetime(2015, 1, 12, 10, 0, 30), 2),
datetime(2015, 1, 12, 10, 0, 40),
(datetime(2015, 1, 12, 10, 0, 50), 2),
(datetime(2015, 1, 12, 10, 1, 0), 3),
(datetime(2015, 1, 12, 10, 1, 20), 3),
]) == 60
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
(datetime(2015, 1, 12, 10, 0, 0), 2),
datetime(2015, 1, 12, 10, 0, 10),
(datetime(2015, 1, 12, 10, 1, 0), 2),
], datetime(2015, 1, 12, 10, 0, 50)) == 10
assert sum_light([
datetime(2015, 1, 12, 10, 0, 20),
(datetime(2015, 1, 12, 10, 0, 30), 2),
datetime(2015, 1, 12, 10, 0, 40),
(datetime(2015, 1, 12, 10, 0, 50), 2),
], datetime(2015, 1, 12, 10, 0, 30)) == 20
assert sum_light([
datetime(2015, 1, 12, 10, 0, 20),
(datetime(2015, 1, 12, 10, 0, 30), 2),
datetime(2015, 1, 12, 10, 0, 40),
(datetime(2015, 1, 12, 10, 0, 50), 2),
], datetime(2015, 1, 12, 10, 0, 20)) == 30
assert sum_light([
datetime(2015, 1, 12, 10, 0, 20),
(datetime(2015, 1, 12, 10, 0, 30), 2),
datetime(2015, 1, 12, 10, 0, 40),
(datetime(2015, 1, 12, 10, 0, 50), 2),
], datetime(2015, 1, 12, 10, 0, 10)) == 30
assert sum_light([
datetime(2015, 1, 12, 10, 0, 20),
(datetime(2015, 1, 12, 10, 0, 30), 2),
datetime(2015, 1, 12, 10, 0, 40),
(datetime(2015, 1, 12, 10, 0, 50), 2),
], datetime(2015, 1, 12, 10, 0, 50)) == 0
assert sum_light([
(datetime(2015, 1, 12, 10, 0, 10), 3),
datetime(2015, 1, 12, 10, 0, 20),
(datetime(2015, 1, 12, 10, 0, 30), 3),
(datetime(2015, 1, 12, 10, 0, 30), 2),
datetime(2015, 1, 12, 10, 0, 40),
(datetime(2015, 1, 12, 10, 0, 50), 2),
], datetime(2015, 1, 12, 10, 0, 30)) == 20
assert sum_light([
(datetime(2015, 1, 12, 10, 0, 10), 3),
datetime(2015, 1, 12, 10, 0, 20),
(datetime(2015, 1, 12, 10, 0, 30), 3),
(datetime(2015, 1, 12, 10, 0, 30), 2),
datetime(2015, 1, 12, 10, 0, 40),
(datetime(2015, 1, 12, 10, 0, 50), 2),
], datetime(2015, 1, 12, 10, 0, 20)) == 30
assert sum_light([
(datetime(2015, 1, 12, 10, 0, 10), 3),
datetime(2015, 1, 12, 10, 0, 20),
(datetime(2015, 1, 12, 10, 0, 30), 3),
(datetime(2015, 1, 12, 10, 0, 30), 2),
datetime(2015, 1, 12, 10, 0, 40),
(datetime(2015, 1, 12, 10, 0, 50), 2),
(datetime(2015, 1, 12, 10, 1, 20), 2),
(datetime(2015, 1, 12, 10, 1, 40), 2),
], datetime(2015, 1, 12, 10, 0, 20)) == 50
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
(datetime(2015, 1, 12, 10, 0, 0), 2),
datetime(2015, 1, 12, 10, 0, 10),
(datetime(2015, 1, 12, 10, 1, 0), 2),
], datetime(2015, 1, 12, 10, 0, 30), datetime(2015, 1, 12, 10, 1, 0)) == 30
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
(datetime(2015, 1, 12, 10, 0, 0), 2),
datetime(2015, 1, 12, 10, 0, 10),
(datetime(2015, 1, 12, 10, 1, 0), 2),
], datetime(2015, 1, 12, 10, 0, 20), datetime(2015, 1, 12, 10, 1, 0)) == 40
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
(datetime(2015, 1, 12, 10, 0, 0), 2),
datetime(2015, 1, 12, 10, 0, 10),
], datetime(2015, 1, 12, 10, 0, 0), datetime(2015, 1, 12, 10, 0, 30)) == 30
assert sum_light([
(datetime(2015, 1, 12, 10, 0, 10), 3),
datetime(2015, 1, 12, 10, 0, 20),
(datetime(2015, 1, 12, 10, 0, 30), 3),
(datetime(2015, 1, 12, 10, 0, 30), 2),
datetime(2015, 1, 12, 10, 0, 40),
(datetime(2015, 1, 12, 10, 0, 50), 2),
], datetime(2015, 1, 12, 10, 0, 0), datetime(2015, 1, 12, 10, 1, 0)) == 40
assert sum_light([
(datetime(2015, 1, 12, 10, 0, 10), 3),
datetime(2015, 1, 12, 10, 0, 20),
(datetime(2015, 1, 12, 10, 0, 30), 3),
(datetime(2015, 1, 12, 10, 0, 30), 2),
datetime(2015, 1, 12, 10, 0, 40),
(datetime(2015, 1, 12, 10, 0, 50), 2),
], datetime(2015, 1, 12, 10, 0, 0), datetime(2015, 1, 12, 10, 0, 10)) == 0
assert sum_light([
(datetime(2015, 1, 12, 10, 0, 10), 3),
datetime(2015, 1, 12, 10, 0, 20),
(datetime(2015, 1, 12, 10, 0, 30), 3),
(datetime(2015, 1, 12, 10, 0, 30), 2),
datetime(2015, 1, 12, 10, 0, 40),
(datetime(2015, 1, 12, 10, 0, 50), 2),
], datetime(2015, 1, 12, 10, 0, 10), datetime(2015, 1, 12, 10, 0, 20)) == 10
assert sum_light([
(datetime(2015, 1, 12, 10, 0, 10), 3),
datetime(2015, 1, 12, 10, 0, 20),
(datetime(2015, 1, 12, 10, 0, 30), 3),
(datetime(2015, 1, 12, 10, 0, 30), 2),
], datetime(2015, 1, 12, 10, 0, 10), datetime(2015, 1, 12, 10, 0, 20)) == 10
assert sum_light([
(datetime(2015, 1, 12, 10, 0, 10), 3),
datetime(2015, 1, 12, 10, 0, 20),
(datetime(2015, 1, 12, 10, 0, 30), 3),
(datetime(2015, 1, 12, 10, 0, 30), 2),
], datetime(2015, 1, 12, 10, 0, 10), datetime(2015, 1, 12, 10, 0, 30)) == 20
assert sum_light(els=[
(datetime(2015, 1, 11, 0, 0, 0), 3),
datetime(2015, 1, 12, 0, 0, 0),
(datetime(2015, 1, 13, 0, 0, 0), 3),
(datetime(2015, 1, 13, 0, 0, 0), 2),
datetime(2015, 1, 14, 0, 0, 0),
(datetime(2015, 1, 15, 0, 0, 0), 2),
], start_watching=datetime(2015, 1, 10, 0, 0, 0), end_watching=datetime(2015, 1, 16, 0, 0, 0)) == 345600
print("The forth mission in series is completed? Click 'Check' to earn cool rewards!")
Oct. 12, 2021
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