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  1. lowerbound, upperbound = map(int, raw_input().split())
  2. c = 0
  3. for i in range(len(bin(lowerbound))-2, len(bin(upperbound))-1):
  4.     s = ['1'] * i
  5.     for j in range(len(s)-1):
  6.         k = s[:]
  7.         k[len(k)-1-j] = '0'
  8.         k = int(''.join(k), 2)
  9.         if (k<=upperbound) and (k>=lowerbound):
  10.             c += 1
  11. print c
Success #stdin #stdout 0.01s 8976KB
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stdin
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72057594000000000 72057595000000000
stdout
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26
https://ideone.com/xbsZ9A
language:
Python (cpython 2.7.16)
created:
8 years ago
visibility:
public

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