Project Euler: Problem 6, Natural numbers, squares and sums.
Getting the absolute index from a matrix
Number of Horns on a unicorn!
The length of the equal sides of an isoceles triangle is 'a'.For all the possible (integer) values of the remaining side,find the associated angles between the two equal sides.
find nth even fibonacci number
Rotate a matrix without using rot90
remove numbers from a string
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