c*****t
发帖数: 1879 | 1 re-write the problem this way:
6 boxes
_ _ _ _ _ _
Each box cannot have more than 9 donuts, fill the box so that
the total of donuts in the boxes are 37. | w**n
发帖数: 88 | 2 expand (1+t+t^2+t^3+...t^9)^6, add up all the coefficients with t^n(n<=37)
then add 1 for 1000000.
【在 c*****t 的大作中提到】
: re-write the problem this way:
: 6 boxes
: _ _ _ _ _ _
: Each box cannot have more than 9 donuts, fill the box so that
: the total of donuts in the boxes are 37.
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