Sir , i got only 1 test case correct , but could not get the reason behind it?

#1

It is the code , please help me out , what is the problem with the code

#2

Hey @aryan_007
https://www.quora.com/Permutations-and-Combinations-In-how-many-ways-can-we-divide-n-distinct-objects-into-r-distinct-groups-of-equal-or-unequal-sizes-having-at-least-1-object-each
This is the question and explanation for the answer
The question is basically selecting N object from K groups

If your doubt is resolved please mark it as closed.

#3

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