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# Sum square difference
# Problem 6
#
# The sum of the squares of the first ten natural numbers is,
# $$1^2 + 2^2 + ... + 10^2 = 385$$
# The square of the sum of the first ten natural numbers is,
# $$(1 + 2 + ... + 10)^2 = 55^2 = 3025$$
# Hence the difference between the sum of the squares of the first ten natural numbers and
# the square of the sum is $3025 - 385 = 2640$.
# Find the difference between the sum of the squares of the first one hundred natural
# numbers and the square of the sum.
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const COUNT = 100
result = sum(1:COUNT) ^ 2 - sum(x ^ 2 for x in 1:COUNT)
println(result)