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comprehension solution in Clear category for Lightbulb End Watching by kurosawa4434
from datetime import datetime
from typing import List, Optional
def sum_light(els: List[datetime], start_watching: Optional[datetime] = None, end_watching: Optional[datetime] = None) -> int:
if len(els) % 2:
els.append(datetime.max)
sw = start_watching or els[0]
ew = end_watching or datetime.max
return int(sum((min(ew, els[i + 1]) - max(sw, els[i])).total_seconds()
for i in range(0, len(els), 2) if sw <= els[i + 1] and ew >= els[i]))
Nov. 17, 2020
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