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  1. # your code goes here
  2.  
  3. def esPrimo(n):
  4. 	if(n==2): return True
  5. 	if(n%2==0): return False
  6. 	return esPrimoAux(3, n)
  7.  
  8. def esPrimoAux(i, n):
  9. 	if(i*i > n): return True
  10. 	if(n%i==0): return False
  11. 	return esPrimoAux(i*2, n)
  12.  
  13. def pfr(a,b):
  14. 	return pfrAux(a,b,0)
  15.  
  16. def pfrAux(a,b,cont):
  17. 	for i in range(a,b):
  18. 		if(esPrimo(i)):
  19. 			if(i%10==7):
  20. 				cont +=1
  21. 	return cont
  22.  
  23. print(pfr(7,17))
Success #stdin #stdout 0.03s 9568KB
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https://ideone.com/xftslJ
language:
Python 3 (python  3.9.5)
created:
1 year ago
visibility:
public

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