Your solution is fastest so far.
Good job, Athi.
@Athi, your solution contains many "magic" constant variables that I don't know how you got.
William's solution is much easier to understood, although it is slower than yours.
Thanks li haitao.
Inner product of two vectors
Project Euler: Problem 6, Natural numbers, squares and sums.
Back to basics 26 - Keywords
Set the array elements whose value is 13 to 0
Integer Sequence - II : New Fibonacci
Word Distance - Sum
Large Sum (inspired by Project Euler 13)
Lights Out 7 - 5x5, x moves
Stress-Strain Properties - 2
Lights Out 8 - 5x5, light-only solution? I
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