Is 2D range sum work for this problem,How?

Revision en1, by whuuiee, 2018-07-24 20:44:10

Hints me 5132-Coffe Central Or if range sum not works give me any better solution...... thank you.

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en1 English whuuiee 2018-07-24 20:44:10 241 Initial revision (published)