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December 18, 2015 08:59
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| """ | |
| For a +ve integer n, print numbers from 0 to 2^n-1 such that numbers next to each other differ in exactly 1 bit. | |
| """ | |
| n = 3 | |
| gray = lambda x : (x >> 1) ^ x | |
| pad_left = lambda s,l: ''.join(['0']*(l-len(s))) + s | |
| for i in xrange(1 << n): | |
| print i,pad_left(bin(gray(i))[2:],n) |
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