Code is trying to go down stairs from his building to ground floor.
He can go 3 ways:
1. Walk 1 step at a time.
2. Extend his legs and go 2 steps at a time.
3. Jump down 3 steps at a time.
Given n steps, calculate the number of possible ways to reach the ground floor, provided he can jump 3 steps at most once during this process.
That is, he can jump down 3 steps only once, but at any time, if he wishes, while walking down the stairs.
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I can't understand.......
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0
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don't no
Explanation:
mark as brainlist
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