Lightbulb Operating Lightbulb Operating
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Since you are here, it means that you’ve already solved 4 missions of the series. Your function can already adopt more than one light bulb in the date array to determine if the room is lit or not. And with the second and third elements the period we want to observe can be defined.

In the 5th mission, a fourth argument is added - the operating time of the light bulbs. By analogy with the previous missions - if it’s not passed, then the bulb works indefinitely.

The operating time argument is passed as a timedelta object. It shows how long the light bulb can work when it’s on. It has no cooling, which means that if our bulb can work for only one hour, then...

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