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def shellSort(items):
inc = len(items) / 2
while inc:
for i in xrange(len(items)):
j = i
temp = items[i]
while j >= inc and items[j-inc] > temp:
items[j] = items[j - inc]
j -= inc
items[j] = temp
inc = inc/2 if inc/2 else (0 if inc==1 else 1)
a = [35, -8, 11, 1, 68, 0, 3];
shellSort(a)
print a # [-8, 0, 1, 3, 11, 35, 68]