please fix the description
Filled with "5" not "4".
Given an unsigned integer x, find the largest y by rearranging the bits in x
Symmetry of vector
Union of two set decreasing order
first element of matrix
If you have matrix A, create matrix B using matrix A as an "element"
ASCII code of a leter.
Area of a circle
Square root of a number
Corresponding letter to ASCII code.
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