Chef and Enemies

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Chef has N enemies. Chef knows that his enemies will come one after another at positive integral minutes Ai (Ais are in strictly increasing order) after midnight. Now Chef has an infinite storage of machine guns, each machine gun fires continuously for R minutes and then stops, however he needs to spend 1 minute to set up a machine gun before he can fire it. However he needs to fire at least K m

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solution.cppC++17

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