Create test.hs

test.hs

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+-- Haskell
+
+gcd :: Integer -> Integer -> Integer
+gcd a b = if b > 0 then gcd b (mod a b) else a
+
+main = do
+    putStrLn "test"
+    let n = 1000
+    let a = [0..n-1]
+    print $ foldl (+) 0 (map (\i -> foldl (+) 0 (map (`gcd` i) a)) a)