Recently I was going through the prefix sums topic in silver and i really loved the material
and I also remember there was interesting problem in the bottom which was computation of
sums of this form 1a[i] +2a[i+1] + 3*a[i+2]+…
. I am unable to find it now so I think there must be an update and why its missing now?
It got removed since it isn’t really relevant to USACO.
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It was moved into the solution for:
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