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Oct 13th, 2015
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  1.  
  2. (define digito-f-verd
  3.   (lambda (d-f)
  4.     (cond ((= d-f 0) 0)
  5.           ((= d-f 2) 1)
  6.           ((= d-f 4) 2)
  7.           ((= d-f 6) 3)
  8.           ((= d-f 8) 4)
  9.           ((= d-f 1) 5)
  10.           ((= d-f 3) 6)
  11.           ((= d-f 5) 7)
  12.           ((= d-f 7) 8)
  13.           ((= d-f 9) 9))))
  14.  
  15. (define falso->verdadeiro
  16.   (lambda (num-falso)
  17.     (letrec ( f->v
  18.               (lambda (f x)
  19.                 (if (< f 10)
  20.                     (digito-f-verd f)
  21.                     (falso->verdadeiro (quotient num-falso 10)))))
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