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  1. n=int(input("introducir n: "))
  2. a=-1
  3. b=1
  4. for i in range(n):
  5. c=a+b
  6. a=b
  7. b=c
  8. print(c)
  9.  
Success #stdin #stdout 0.01s 7292KB
stdin
6
stdout
introducir n: 0
1
1
2
3
5