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project euler 6, haskell
--http://www.haskell.org/haskellwiki/Euler_problems/1_to_10 --The sum of the squares of the first ten natural numbers is, --12 + 22 + ... + 102 = 385 --The square of the sum of the first ten natural numbers is, --(1 + 2 + ... + 10)2 = 552 = 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. problem_6 = (sum [1..100])^2 - sum (map (^2) [1..100]) main = print $ problem_6
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