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![[Leetcode Weekly 305] Number of Arithmetic Triplet](/_next/image?url=https%3A%2F%2Fi.ytimg.com%2Fvi%2FsCsBuE2xCh0%2Fhq720.jpg%3Fsqp%3D-oaymwExCNAFEJQDSFryq4qpAyMIARUAAIhCGAHwAQH4Af4IgALQBYoCDAgAEAEYZSBlKGUwDw%3D%3D%26rs%3DAOn4CLB3Z4juRTce4nASSe4Hl7dPnTmVfQ&w=256&q=75)
