计算)c0m7j;o5O+R5]
1000+999-998-997+996+995-994-993……+108+107-106-105+104+103-102-1011000+999-998-997+996+995-994-993+……+108+107-106-105+104+103-102-101)c0m7j;o5O+R5]
算式：提示.I*O+[*Y9B)c0m7j;o5O+R5]
=3q(I:P)c0m7j;o5O+R5]