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  1. t = int(input())
  2. for i in range(t):
  3. 	s = input().split()
  4. 	v1 = int(s[0])
  5. 	v2 = int(s[1])
  6. 	v = (2*v1*v2)/(v1+v2) # wzor ten jest przeksztalceniem wzoru V średnia = całkowita droga / całkowity czas
  7. 	print(int(v))
  8.  
Success #stdin #stdout 0.02s 27712KB
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https://ideone.com/zPh6u2
language:
Python 3 (python  3.9.5)
created:
5 years ago
visibility:
public

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