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zip_longest, min max solution in Clear category for Lightbulb End Watching by kudinov.feodor
# Taken from mission Lightbulb Start Watching
from datetime import datetime
from typing import List, Optional
from itertools import zip_longest
def sum_light(els: List[datetime],
start_watching: Optional[datetime] = None,
end_watching: Optional[datetime] = None) -> int:
"""
how long the light bulb has been turned on
"""
total = 0
for (s, e) in zip_longest(els[::2], els[1::2], fillvalue=end_watching):
s = max(s, start_watching) if start_watching else s
e = min(e, end_watching) if end_watching else e
total += (e - s).total_seconds() if e > s else 0
return total
if __name__ == '__main__':
print("Example:")
print(sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
datetime(2015, 1, 12, 11, 0, 0),
datetime(2015, 1, 12, 11, 10, 10),
]))
# These "asserts" are used for self-checking and not for an auto-testing
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
]) == 610
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
datetime(2015, 1, 12, 11, 0, 0),
datetime(2015, 1, 12, 11, 10, 10),
]) == 1220
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
datetime(2015, 1, 12, 11, 0, 0),
datetime(2015, 1, 12, 11, 10, 10),
datetime(2015, 1, 12, 11, 10, 10),
datetime(2015, 1, 12, 12, 10, 10),
]) == 4820
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 0, 1),
]) == 1
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 0, 10),
datetime(2015, 1, 12, 11, 0, 0),
datetime(2015, 1, 13, 11, 0, 0),
]) == 86410
print("The first mission in series is completed? Click 'Check' to earn cool rewards!")
print("Example:")
print(sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 0, 10),
],
datetime(2015, 1, 12, 10, 0, 5)))
assert sum_light(els=[
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 0, 10),
],
start_watching=datetime(2015, 1, 12, 10, 0, 5)) == 5
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 0, 10),
], datetime(2015, 1, 12, 10, 0, 0)) == 10
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
datetime(2015, 1, 12, 11, 0, 0),
datetime(2015, 1, 12, 11, 10, 10),
], datetime(2015, 1, 12, 11, 0, 0)) == 610
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
datetime(2015, 1, 12, 11, 0, 0),
datetime(2015, 1, 12, 11, 10, 10),
], datetime(2015, 1, 12, 11, 0, 10)) == 600
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
datetime(2015, 1, 12, 11, 0, 0),
datetime(2015, 1, 12, 11, 10, 10),
], datetime(2015, 1, 12, 10, 10, 0)) == 620
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
datetime(2015, 1, 12, 11, 0, 0),
datetime(2015, 1, 12, 11, 10, 10),
datetime(2015, 1, 12, 11, 10, 11),
datetime(2015, 1, 12, 12, 10, 11),
], datetime(2015, 1, 12, 12, 10, 11)) == 0
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
datetime(2015, 1, 12, 11, 0, 0),
datetime(2015, 1, 12, 11, 10, 10),
datetime(2015, 1, 12, 11, 10, 11),
datetime(2015, 1, 12, 12, 10, 11),
], datetime(2015, 1, 12, 12, 9, 11)) == 60
# test if start watching is before light is on
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
datetime(2015, 1, 12, 11, 0, 0),
datetime(2015, 1, 12, 11, 10, 10),
], datetime(2015, 1, 12, 9, 0, 0)) == 1220
print("The second mission in series is done? Click 'Check' to earn cool rewards!")
print(
sum_light(
[
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 0, 10),
],
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 0, 10),
)
)
assert (
sum_light(
els=[
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 0, 10),
],
start_watching=datetime(2015, 1, 12, 10, 0, 0),
end_watching=datetime(2015, 1, 12, 10, 0, 10),
)
== 10
)
assert (
sum_light(
[
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 0, 10),
],
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 0, 7),
)
== 7
)
assert (
sum_light(
[
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 0, 10),
],
datetime(2015, 1, 12, 10, 0, 3),
datetime(2015, 1, 12, 10, 0, 10),
)
== 7
)
assert (
sum_light(
[
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 0, 10),
],
datetime(2015, 1, 12, 10, 0, 10),
datetime(2015, 1, 12, 10, 0, 20),
)
== 0
)
assert (
sum_light(
[
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
datetime(2015, 1, 12, 11, 0, 0),
datetime(2015, 1, 12, 11, 10, 10),
],
datetime(2015, 1, 12, 10, 30, 0),
datetime(2015, 1, 12, 11, 0, 0),
)
== 0
)
assert (
sum_light(
[
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
datetime(2015, 1, 12, 11, 0, 0),
datetime(2015, 1, 12, 11, 10, 10),
],
datetime(2015, 1, 12, 10, 10, 0),
datetime(2015, 1, 12, 11, 0, 0),
)
== 10
)
assert (
sum_light(
[
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
datetime(2015, 1, 12, 11, 0, 0),
datetime(2015, 1, 12, 11, 10, 10),
],
datetime(2015, 1, 12, 10, 10, 0),
datetime(2015, 1, 12, 11, 0, 10),
)
== 20
)
assert (
sum_light(
[
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
datetime(2015, 1, 12, 11, 0, 0),
datetime(2015, 1, 12, 11, 10, 10),
],
datetime(2015, 1, 12, 9, 50, 0),
datetime(2015, 1, 12, 10, 0, 10),
)
== 10
)
assert (
sum_light(
[
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
datetime(2015, 1, 12, 11, 0, 0),
datetime(2015, 1, 12, 11, 10, 10),
],
datetime(2015, 1, 12, 9, 0, 0),
datetime(2015, 1, 12, 10, 5, 0),
)
== 300
)
assert (
sum_light(
[
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
datetime(2015, 1, 12, 11, 0, 0),
datetime(2015, 1, 12, 11, 10, 10),
],
datetime(2015, 1, 12, 11, 5, 0),
datetime(2015, 1, 12, 12, 0, 0),
)
== 310
)
assert (
sum_light(
[
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
datetime(2015, 1, 12, 11, 0, 0),
],
datetime(2015, 1, 12, 11, 5, 0),
datetime(2015, 1, 12, 11, 10, 0),
)
== 300
)
assert (
sum_light(
[
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
datetime(2015, 1, 12, 11, 0, 0),
],
datetime(2015, 1, 12, 10, 10, 0),
datetime(2015, 1, 12, 11, 0, 10),
)
== 20
)
assert (
sum_light(
[
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 10, 10),
datetime(2015, 1, 12, 11, 0, 0),
],
datetime(2015, 1, 12, 9, 10, 0),
datetime(2015, 1, 12, 10, 20, 20),
)
== 610
)
assert (
sum_light(
[
datetime(2015, 1, 12, 10, 0, 0),
],
datetime(2015, 1, 12, 9, 10, 0),
datetime(2015, 1, 12, 10, 20, 20),
)
== 1220
)
assert (
sum_light(
[
datetime(2015, 1, 12, 10, 0, 0),
],
datetime(2015, 1, 12, 9, 9, 0),
datetime(2015, 1, 12, 10, 0, 0),
)
== 0
)
assert (
sum_light(
[
datetime(2015, 1, 12, 10, 0, 0),
],
datetime(2015, 1, 12, 9, 9, 0),
datetime(2015, 1, 12, 10, 0, 10),
)
== 10
)
print(
"The third mission in series is completed? Click 'Check' to earn cool rewards!"
)
March 13, 2023