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?
n = int(input())
kazu = 0
for i in range(n):
  kazu += i
print(kazu)
n = int(input())
kazu = 0
for i in range(n + 1):
  kazu += i
print(kazu)