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kemi4

Untitled

Sep 20th, 2019
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  1. n = int(input())
  2. square = 0
  3. s = 1
  4. for i in range(2*n-1):
  5. if i > 0 and i <= n:
  6. square += s
  7. s += 2
  8. print(square)
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