change the signs of the even index entries of the reversed vector
vec = [4 -1 -2 9]
ans = [9 2 -1 -4]
vec = [-4 -1 -2 -9]
ans = [-9 2 -1 4]
The test suite has been expanded.
Which doors are open?
Calculate the area of a triangle between three points
Max index of 3D array
find radius of cone
What number has this problem?
Moving average (variable kernel length)
Duplicate a character
Symmetry of vector
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