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justinvoss/pyramid.py

Created November 23, 2011 17:21
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Tennis Ball Pyramid Part Deux
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pyramid.py
def pyramid(level):
total = 0
for x in range(1, level+1):
total += (x * x)
return total
assert pyramid(1) == 1
assert pyramid(2) == 5
assert pyramid(3) == 14
print "Tennis balls in a 10,000-level pyramid: %d" % pyramid(10000)
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