/127A.py

https://bitbucket.org/alculquicondor/codeforces · Python · 13 lines · 11 code · 2 blank · 0 comment · 4 complexity · 3080f5ebe04db82ec4e5edb0aba263c1 MD5 · raw file 

    

  1. from math import sqrt
    2. 

  2. 

  3. def dist(a,b):
    4. 

  4. 	return sqrt((a[0]-b[0])**2+(a[1]-b[1])**2)
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  5. 

  6. n,k=[int(x) for x in raw_input().split()]
    7. 

  7. ini=[int(x) for x in raw_input().split()]
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  8. ans=0
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  9. for i in range(n-1):
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  10. 	t=[int(x) for x in raw_input().split()]
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  11. 	ans+=dist(ini,t)
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  12. 	ini=t
    13. 

  13. print ans*k/50.0
    14.