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];
Check if sorted
Distance walked 3D
Whether the input is vector?
Remove the two elements next to NaN value
Times 3 problem
RISK board game battle simulation
It's race time! Write a faster function than the test suite call of unique().
Determine the number of odd integers in a vector
Calculate the probability that at least two people in a group share the same birthday.
It's race time again! Write a function that is at least twice as fast as the test suite call of repmat().
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