Given n, you should return an n-by-n unit matrix.
Example:
If input is n=2 then
A = [ 1 0
0 1 ]If input is n=4 then
A = [ 1 0 0 0
0 1 0 0
0 0 1 0
0 0 0 1 ]
This user (ALBERT ALEXANDER STONIER) appears to have gamed the system, with fraudulent "likes" of this unremarkable solution submitted by 'sock-puppet' accounts. —DIV
improve test suite
Extract leading non-zero digit
896 Solvers
How long is the longest prime diagonal?
260 Solvers
419 Solvers
289 Solvers
195 Solvers
Solution 1817260
You need multiple tests to check a variety of situations.