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![LeetCode 1026. [Medium] Maximum Difference Between Node and Ancestor](/_next/image?url=https%3A%2F%2Fi.ytimg.com%2Fvi%2FhPQ5AKQANEA%2Fhq720.jpg%3Fsqp%3D-oaymwExCNAFEJQDSFryq4qpAyMIARUAAIhCGAHwAQH4Af4JgALQBYoCDAgAEAEYUiBiKGUwDw%3D%3D%26rs%3DAOn4CLDvrvWOZ6xKnpTcjR82SIMVmBVzHw&w=256&q=75)
