in Combinatory recategorized by
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in Combinatory recategorized by
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minal i'm stuck with gen functions too, i solved it by calculating number of non negative integral solutions

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are you getting  my ans?
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utkarsh ans is 126 only , i did calculation mistake

24c4-5c1*18c4 + 5c2*12c4 - 5c3*6c2 = 10626+4950-15300-150 = 126
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