Updating doc of fenwick tree
Updating doc of fenwick tree

TheKingSlayer/interview,hackerFarmaan/interview,UseOnly/interview,lsingal/interview,chinmayakelkar/interview,mission-peace/interview,Shekharrajak/interview,rtkasodariya/interview,harshul1610/interview,onlymilap/interview,prabasn/interview,aman-iitj/interview,mdtareque/interview,priyatransbit/interview,Chrisgcy/interview,saviaga/interview,Shekharrajak/interview,welcomenilesh/interview,manish211/interview-1,saibimajdi/interview,rtkasodariya/interview,chiranjeevjain/interview,kumargauravtiwary/interview,mission-peace/interview,pankajbhanu/interview,nadeembhati/interview,mission-peace/interview,rootmonty/interview,cvasani/interview,allwinsr/interview,sazibislam/codeAlgorithom,sonamsh/interview