Save Parrots

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Bobby has decided to hunt some Parrots. There are n horizontal branch of trees aligned parallel to each other. Branches are numbered 1 to n from top to bottom. On each branch there are some parrots sitting next to each other. Supposed there are $a[i]$ parrots sitting on the $ i-th$ branch. Sometimes Bobby shots one of the parrot and the parrot dies (suppose that this parrots sat at the $i-t

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solution.cppC++17

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