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Nov 17th, 2019
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Python 0.16 KB | None | 0 0
  1. a = []
  2. k = 0
  3. N = 2016
  4.  
  5. for i in range(0, N):
  6.  
  7.   a.append(int(input()))
  8.   for i in range(0,N-2):
  9.         if a[i]*2 == (a[i+1] + a[i+2]):
  10.             k+=1
  11.  
  12. print (k)
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