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  1. import Control.Arrow
  2. sub = uncurry (***) . ((-) *** (-))
  3. tov = uncurry (***) . (sub *** sub) 
  4. main = print $ sub (1, 2) (3, 4)
Success #stdin #stdout 0.02s 3592KB
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Standard input is empty
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(-2,-2)
https://ideone.com/0rtEr
language:
Haskell (ghc 8.4.4)
created:
14 years ago
visibility:
public

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