/127A.py
Python | 13 lines | 11 code | 2 blank | 0 comment | 4 complexity | 3080f5ebe04db82ec4e5edb0aba263c1 MD5 | raw file
1from math import sqrt
2
3def dist(a,b):
4 return sqrt((a[0]-b[0])**2+(a[1]-b[1])**2)
5
6n,k=[int(x) for x in raw_input().split()]
7ini=[int(x) for x in raw_input().split()]
8ans=0
9for i in range(n-1):
10 t=[int(x) for x in raw_input().split()]
11 ans+=dist(ini,t)
12 ini=t
13print ans*k/50.0