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Bone!
Sum of arithmetic sequence formula :)
Fada lawd...
#11b34/3qa:0z:vV
fascinating solution
No mames!
Damn...i forgot about the mathematical way to calculate the sum.Nice one!
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I have the gauss formula in my mind but it wasn't enough because I am so stup88 :C
Speedvice and memoryvice this is the best solution, since it is independent of how big is the input. It doesnt need to iterate over integers, or store anything.
https://math.stackexchange.com/questions/2547122/sum-of-cells-in-chessboard
Hey i am unable to undestand it can you give a reference link or something like that.?
it's ten times faster than sum returns
Actually it's the Gauss sum formula...
This comment is hidden because it contains spoiler information about the solution
This comment is hidden because it contains spoiler information about the solution
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