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  1. n = int(input())
  2. p = 0
  3. last = 0
  4. for i in range(0,n):
  5.  
  6.     m = int(input())
  7.  
  8.     p = p + abs(m-last)
  9.     last = m
  10. p = p + last + n*2
  11. print(p)
  12. # your code goes here
Success #stdin #stdout 0.02s 9364KB
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stdin
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4
30
87
88
31
stdout
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184
https://ideone.com/QJO3u3
language:
Python 3 (python  3.9.5)
created:
4 years ago
visibility:
public

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