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Mar 30th, 2020
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  1. #Sa se inverse un sir de caractere
  2. #Indicatie: Pentru a inversa un sir de caractere se poate folosi o structura de tip Stiva. Caracterele sunt
  3. #citite de la stanga la dreapta si sunt introduse in stiva apoi sunt extrase intr-un nou sir.
  4.  
  5. from stivat import StivaT
  6.  
  7. #sirul initial
  8. sir = input('Sir de caractere')
  9. stv = StivaT(len(sir))
  10.  
  11. #se introduc caracterele in stiva
  12. #de la stanga la dreapta
  13.  
  14. for c in sir:
  15. stv.push(c)
  16.  
  17.  
  18. #sirul inversat
  19. ris = ''
  20.  
  21. #se extrag caracterele din stiva
  22. while not stv.isEmpty():
  23. ris += stv.pop()
  24.  
  25. print ('Sirul inversat:',ris)
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