There are N children in AtCoder Kindergarten. Mr. Evi 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?
x = int(input())
y = (x + 1)*x/2
print(y)
x = int(input())
y = (x + 1)*x
print(int(y/2))