Subtract (1/2) of it from 1993, then subtract the remaining (1/3), then subtract the remaining (1/4)…, and so on, until finally subtract the remaining (1/1993) , what is the last remaining number.
1993减去它的(1/2)，再减去余下的(1/3)，再减去余下的(1/4)…，依此类推，一直到最后减去余下的(1/1993)，最后剩下的数是多少．
<result>1</result>