There are exactly one thousand boxes, numbered from 1-1000, as well as one thousand persons also numbered from 1-1000. All have to open or close the box as the following instructions
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590,000
625,000
6% off
1,499
2,499
40% off
13,000
18,000
28% off
590,000
625,000
6% off
13,000
18,000
28% off
3,999
5,499
27% off
999
1,499
33% off
590,000
0.0
5.0
13,000
5.0
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