blob: 3ec1ff5c88427c18d0ef8bd1abe29f82b2abf634 (
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width = 1001
max_level = (width-1)/2
last = sum = 1
for level in range(1, max_level+1):
add = 2*level
sum += (last+add) + (last+2*add) + (last+3*add) + (last+4*add)
last = last+4*add
print sum
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