Count OF Candy

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There are $N$ children in CodeChef kindergarten. Chef will arrange the children in a line, then give 1 candy to the first child in the line, 2 candies to the second child, ..., N candies to the N-th child. How many candies will be necessary in total? ### Input - Only a single line which consists of $N$, the total number of children ### Output - Print the necessary number of candies in total. ##

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solution.cppC++17

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