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Goblet Of Fire

Goblet of Fire was the event name Professor Dumbledore announced for the the triwizard-tournament. This event had only task, and if one wrong answer is made contestant is out of the tournament. There are three contestant Harry Potter, Cedric digory and Viktor Krum. The task is to solve the series -3, -4, -6, -8, -12, -14... and so on. Harry needs your help to solve the series. Input First line

HINT LADDERno hints yet
L1 Observation
L2 Technique
L3 Approach
L4 Pseudo-code
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L5 Full solution
L5 unlocks only if you insist twice
solution.cppC++17

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