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![LeetCode 319. Bulb Switcher - Math Trick Fully Explained [Coding Interview Question]](/_next/image?url=https%3A%2F%2Fi.ytimg.com%2Fvi%2FlyZhLR292yY%2Fhq720.jpg%3Fsqp%3D-oaymwEXCNAFEJQDSFryq4qpAwkIARUAAIhCGAE%3D%26rs%3DAOn4CLDUz3yzu8hMmqB_Mi80slJx4UtoUA&w=256&q=75)
