In two-dimensional space, a ring can be constructed by using two concentric circles. Determine the area of a ring which has r1 as the inner radius and r2 as the outer radius.
Find the longest sequence of 1's in a binary sequence.
Swap the input arguments
The sum of the numbers in the vector
Sort the vector with the given index
Rotate Matrix @180 degree
Volume of Spherical Shell
Perimeter of a quadrilateral
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