added extra long factorial solution#47

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ertosns wants to merge 5 commits intoBlakeBrown:masterfrom

Commits on Sep 8, 2021

application hint to non divisble subset added
mohab
committed
added extra long factorial problem
mohab
committed

Commits on Sep 9, 2021

added queen's attack II
mohab
committed
3d surface area solution
mohab
committed

Commits on Sep 14, 2021

added larry's array implementation
mohab
committed