换个思路，用刚学的set.

s = set([])

x = 0

for x in range(0, 100):

    x+=1

    y=x*x

    s.add(y)

print sum(s)

L = []

x=1

while x<=100:

    L.append(x*x)

    x=x+1

print sum(L)

L = []

x=1

while x<=100:

    y=x*x

    L.append(y)

    x=x+1

print sum(L)

L = []

x=1

while x<=100:

    y=x*x

    L.append(y)

    x=x+1

print sum(L)