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Jun 13th, 2021
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  1. def f(s,x):
  2. if s>x:
  3. return 0
  4. if s==x:
  5. return 1
  6. k=f(s,x-1)
  7. k+=f(s,x-2)
  8. return k
  9. print(f(11,23)*f(23,29)+f(11,17)*f(17,23)*f(23,29)+f(11,23)*f(23,29))
  10.  
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