Subtract (1/2) from 2001, then subtract the remaining (1/3), then subtract the remaining (1/4), and then subtract the remaining (1/5), (1/6 ), ... and so on until the last remaining (1/2001), then how much is the final result.
2001减去它的(1/2)，再减去余下的(1/3)，再减去余下的(1/4)，以后每次减去余下的(1/5)、(1/6)，…以此类推，一直减到最后余下的(1/2001)，那么最后得多少．
<result>1</result>