At 3:15 , how come every element is updated by +v. In the previous lectures we were taught that only those elements are updated which satisfy this relation :- i+= (i&(-i)) ??
Updates in BIT trees
You are getting it wrong. You are not clear with How the nodes store elements. Please watch carefully again.
For eg.
BIT[6] doesn’t mean 6th node. BIT[8] doesn’t mean 8th node.
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