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البرز

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May 31st, 2015
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Python 0.12 KB | None | 0 0
  1. n=int(input())
  2. s=n
  3. d=0
  4. while s!=0:
  5.     d=d+1
  6.     s=s//10
  7. e=9
  8. for i in range(1,d):
  9.     e=e+9*(10**i)
  10. print((e-n)+1)
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