Covering some basic topics I haven't seen elsewhere on Cody.
Given an input matrix, generate an output matrix that consists of the input matrix replicated in a 2 by 2 pattern Examples:
[1] -> [1 1
1 1]
[1 2 -> [1 2 1 2
3 4] 3 4 3 4
1 2 1 2
3 4 3 4]
16169 Solvers
Replace NaNs with the number that appears to its left in the row.
1622 Solvers
Find best placement for ordered dominoes (harder)
187 Solvers
179 Solvers
133 Solvers