dim i as integer, j as integer, k as integer, r as integer

k = 1
r = 0
for i = 1 to 1000
for j = 1 to k
r = r + 1
if r = 1004 then
exit for
end if
next j

if r = 1004 then
exit for
end if
k = k + 1
next i

k 就是最后的结果