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![[Leetcode] 1137. N-th Tribonacci Number](/_next/image?url=https%3A%2F%2Fi.ytimg.com%2Fvi%2FjMSa3QnnsCY%2Fhq720.jpg%3Fsqp%3D-oaymwExCNAFEJQDSFryq4qpAyMIARUAAIhCGAHwAQH4Af4JgAKuBYoCDAgAEAEYYyBjKGMwDw%3D%3D%26rs%3DAOn4CLD1A7NQH8KsSS2boAzSuEpx-Qx7sg&w=256&q=75)