Fixed problem where set membership was shifted by one.
Fixed problem where set membership was shifted by one.

VCG/upset,VCG/upset,zhanghuijun-hello/test,XDATA-Year-3/UpSet,syrenio/powerset,XDATA-Year-3/UpSet,syrenio/powerset,syrenio/upset,XDATA-Year-3/UpSet,XDATA-Year-3/UpSet,VCG/upset,zhanghuijun-hello/test,VCG/upset,XDATA-Year-3/UpSet,syrenio/powerset,syrenio/upset,zhanghuijun-hello/test,syrenio/upset,syrenio/upset,zhanghuijun-hello/test,syrenio/powerset