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  1. main = readLn >>= \kolvo -> let
  2.     reshenie = najdiNuljEpt (\x -> 2*x*(x+1)*(x+2) - 12*kolvo) 1
  3.     in print (floor reshenie)
  4.  
  5. najdiNuljEpt f = (!!56) . iterate (\xi -> xi - f xi/dfdx f xi)
  6.  
  7. dfdx f x = (f (x+h) - f x)/h
  8. h = 1/10^6
Success #stdin #stdout 0s 6320KB
comments (?)
stdin 
1488
stdout 
19
https://ideone.com/000gUS
language:
Haskell (ghc 8.4.4)
created:
9 years ago
visibility:
public

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