Given an input element x, and the dimensions, (m, n) return a matrix of size m x n filled with element x.
Input: repl_mat(2, 2, 5)
Output: [2, 2, 2, 2, 2; 2, 2, 2, 2, 2];
radius of a spherical planet
Is it an Armstrong number?
Perfect Square or not
RISK board game battle simulation
Penny flipping - calculate winning probability (easy)
It's race time! Write a faster function than the test suite call of unique().
It's race time again! Write a function that is at least twice as fast as the test suite call of repmat().
Determine the number of odd integers in a vector
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