HARRY AND HIS CONTEST

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Harry organized a contest and want you to participate in it and give the answer of the question: A boy while surfing on internet opens a sequence of N number of tabs, one after the other & then closes them in the reverse order. The browser takes 10 seconds, in opening/closing a tab completely. After opening or before closing a tab, he reads each tab for 20 seconds. What is the average lifetime o

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solution.cppC++17

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